DETAILED EXPLANATION OF THE INVENTION

This invention relates to compositions useful against helminthiasis and more particularly concerns anthelmintic compositions containing thioallophanate as ingredient.

Helminthiasis, the infestation of the body of domestic animals such as sheep, cattle, horses, goats, pigs, poultry, dogs and cats, by various species of parasitic worms, is perhaps the most common, most serious and most widespread disease in the world. Although the economic significance of this disease has led to extensive research for new and more effective anthelmintics, most of countermeasures developed to date have not been entirely satisfactory for one or more reasons; e.g. poor therapeutic index, specificity of action, high cost, low activity, limited anthelmintic spectrum.

According to this invention, it has been found that the specific thioallophanate compounds herein described possess a significant anthelmintic activity and can be effectively employed in the treatment and/or prevention of helminthiasis.

It is one object of the present invention to provide compositions containing such substances as an active anthelmintic ingredient. It is an additional object to provide methods of using them for the purpose of controlling helminthiasis. Further objects of the invention will become apparent from the following discussion of the invention.

According to the present invention, it has been surprisingly discovered that the thioallophanate compound represented by the following general formula (1) has excellent anthelmintic activity: ##EQU4## wherein X is hydrogen, chlorine atom, nitro or methyl group: Z is a substituting group selected from the group consisting of ##EQU5## and ##EQU6## R₁ represents hydrogen atom or methyl group: R₂ represents alkyl having not more than 12 carbon atoms, alkyl having not more than 3 carbon atoms substituted with halogen, methoxy or phenyl group, alkenyl having 3 carbon atoms which may be substituted with halogen atom, methoxy or phenyl group, alkynyl having 3 carbon atoms and aryl having not more than 10 carbon atoms which may be substituted with halogen atom, nitro or methyl group: R₃ and R₄ represent hydrogen atom or lower alkyl group respectively: R₅ represents hydrogen atom, alkyl or cycloalkyl having not more than 4 carbon atoms, phenyl, alkoxy having not more than 4 carbon atoms, amino, alkylamino, 3,3-dimethyl-2-thioureido or 3,3-dimethylureido group: R₆ and R₇ represent hydrogen and chlorine atoms, methoxy, methyl or nitro group respectively: A represents inorganic acid or organic acid which is capable of forming a salt with an amino group: Y represents oxygen or sulfur atom: and n represents an integer of 0 - 3.

These compound can be prepared according to conventional processes. For example, the production process for the compound in which Z is ##EQU7## group was disclosed in the Patentblatt of German Pat. No. 1806123.9 issued on June 4, 1969 and the production process of other compounds were disclosed in the Patentblatt of German Pat. No. 1,930,540.9 issued on Jan. 8, 1970.

Typical examples of the thioallophanates which can be used in the present invention are listed in the Table 1.

                                                       Melting                                                  Point orNo. of                                                 DecomposionCompound Structural Formula               Chemical Name   Point (d)                                                  (°C)__________________________________________________________________________ SO ∥∥             2-(3-Methoxycarbonyl-2-1     C--NH--C--O--CH3            thioureido)-aniline                                                  184-185(d) SO ∥∥             2-(3-Ethoxycarbonyl-2-2     C--NH--C--O--C2 H5     thioureido)-aniline                                                  162-162.5(d) SO ∥∥CH3     2-(3-iso-Propoxy- C--NH--C--O--CH∠           carbonyl-2-thioureido)                                                  137-1383     CH3                         aniline SO                               1-(2-Amino-4-methyl- ∥∥             phenyl)-3-methoxy-                                                  167.5-168.5(d)4     C--NH--C--O--CH3            carbonyl-2-thiourea SO                               1-(2-Amino-5-chlorophenyl)- ∥∥             3-methoxycarbonyl-2-                                                  182-182.5(d) NH--C--NH--C--O--C2 H5 thiourea NH2 SO                               1-(2-Amino-5-nitrophenyl)- ∥∥             3-methoxycarbonyl-2-                                                  202-203(d)6     NH--C--NH--C--O--C2 H5 thiourea NH2 SO ∥∥             2-(3-Methoxycarbonyl-2- NH--C--NH--C--O--CH3        thioureido)-aniline                                                  153(d)e NH2.HNO3 SO ∥∥ NH--C--NH--C--O--CH3        2-(3-Methoxycarbonyl-2-8     NH2.COOH                    thioureido)-aniline                                                  151.5-152(d) | COOH SO                               2-(3-Ethoxycarboyl-2- ∥∥             thioureido)-aniline                                                  188(d)9     NH--C--NH--C--O--C2 H5 hydrochloride NH2.HCl SO ∥∥             2-(3-Ethoxycarbonyl-2-10    NH--C--NH--C--O--C2 H5 thioureido)-aniline                                                  140.2-140.3(d) SO                               2-(3-Ethoxycarbonyl- ∥∥             2-thioureido)-aniline                                                  140(d)11    NH--C--NH--C--O--C2 H5 oxalate SO                               2-(3-Ethoxycarbonyl- ∥∥             2-thioureido)-aniline                                                  174(d)12    NH--C--NH--C--O--C2 H5 para-toluenesulfonate SO                               2-(3-Ethoxycarbonyl- ∥∥             2-thioureido)-N-methyl-                                                  17113    C-- NH--C--O--C2 H5    aniline SO                               2-(3-Ethoxycarbonyl- ∥∥             2-thioureido)-N,N-                                                  111-11314    NH--C--NH--C--O--C2 H5 dimethylaniline CH3 N∠ CH3 SO                               2-(3-Ethoxycarbonyl-2- ∥∥             thioureido)-N,N-di-                                                  167-168)d)15    CH3                         methylaniline hydrochloride N∠. HCl CH3 S                                1-(3-Ethoxycarbonyl-2- ∥                       thioureido)2-N,N-dimethyl-                                                  170-171 NHCNHCOOC2 H5          aminobenzene oxalate16    CH3 COOH N∠. | CH3 COOH SO ∥∥             1-Formamido-2-(3- NH--C--NH--C--O--CH3        methoxycarbonyl-2-                                                  185(d)17                                     thioureido)-benzene NH--C--H ∥ O SO ∥∥             1-Acetamido-2-(3- NH--C--NH--C--O--CH3        methoxycarbonyl-2-                                                  192.5-193.518                                     thioureido)-benzene NH--C--CH3 ∥ O SO ∥∥             1-Propionamido-2-(3- NH--C--NH--C--O-- C2 H5                                  ethoxycarbonyl-2-                                                  170-171.519                                     thioureido)-benzene NH--C--C2 H5 ∥ O                                  1-Cyclopropancarbonamido-20                                     2-(3-methoxycarbonyl-2-                                                  191-192(d)                                  thioureido)-benzene                                  1-Benzamido-2-(3-21                                     ethoxycarbonyl-2-                                                  192-193                                  thioureido)-benzene SO ∥∥             1-Methoxycarbonamido-2- NH--C--NH--C--O--C2 H5 (3-ethoxycarbonyl-2-                                                  168-170(d)22                                     thioureido)-benzene NH--C--O--CH3 ∥ O SO ∥∥             1-Ethoxycarbonamido-2- NH--C--NH--C--O--CH3        (3-methoxycarbonyl-2-                                                  147-149(d)23                                     thioureido)-benzene NH--C--O--C2 H5 ∥ O SO ∥∥             1-(3-n-Propylureido)-2- NH--C--NH--C--O--CH3        (3-methoxycarbonyl-2-                                                  132.5-133.524                                     thioureido)-benzene NH--C--NH--C3 H7 ∥ O SO ∥∥             1-(3-n-Butylureido)-2- NH--C-- NH--C--O--CH3       (3-methoxycarbonyl-2-                                                  182-18325                                     thioureido)-benzene NH--C--NH--C4 H9 ∥ O SO ∥∥             1-(3-n-Butylureido)-2- NH--C--NH--C--O--C2 H5 (3-ethoxycarbonyl-2-                                                  18226                                     thioureido)-benzene NH--C--NH--C4 H9 ∥ O SO ∥∥             1-Thioformamido-2-(3- NH--C--NH--C--O--C2 H5 ethoxycarbonyl-2-                                                  17227                                     thioureido)-benzene NH--C--H ∥ O SO ∥∥             1-(2-Thiocarbamoyl- NH--C--NH--C--O--C2 H5 aminophenyl)-3-ethoxy-                                                  157(d)28                                     carbonylthiourea NH--C--NH2 ∥ S SO ∥∥             1-(3-Ethoxycarbonyl-2- NH--C--NH--C--O--C2 H5 thioureido)-2-(3-methyl-                                                  160-16129                                     2-thioureido)-benzene NH--C--NH--CH3 ∥ S SO ∥∥             1-(3-n-Propyl-2-thioureido)- NH--C--NH--C--O--C2 H5 2-(3-ethoxycarbonyl-2-                                                  132.5-133.5(d)30                                     thioureido)-benzene NH--C--NH--C3 H7 ∥ S S                                1-(3-N,N-Dimethylamino-2- ∥                       thiocarbonyl-2-thioureido)- NHCNHCOOCH3                 2-(3-methoxycarbonyl-2-                                                  149(d)31    CH3                         thioureido)-benzene NHCNH--C--N∠ ∥∥CH3 SS SO ∥∥             1-(3-N,N-Dimethylaminothio- NH--C--NH--C--O--C2 H5 carbonyl-2-thioureido)-2-32    CH3                         (3-ethoxycarbonyl-2-                                                  148-149(d) NH--C--NH--C--N∠           thioureido)-benzene ∥∥CH3 SS SO                               1-(3-N,N-Dimethylamino- ∥∥             carbonyl-2-thioureido)- NH--C--NH--C--O--CH3        2-(3-methoxycarbonyl-2-                                                  159-160(d)33    CH3                         thioureido)-benzene NH--C--NH--C--N∠ ∥∥CH3 SO                                  1-Benzylidenamino-2-34                                     (3-methoxycarbonyl-2-                                                  145-146                                  thioureido)-benzene                                  1-(4-Chlorobenzylidenamino)-35                                     2-(3-methoxycarbonyl-2-                                                  183-183.5(d)                                  thioureido)-benzene                                  1-(4-Methoxybenzyliden-36                                     amino)-2-(3-methoxycarbonyl-                                                  159-159.5(d)                                  2-thioureido)-benzene                                  1-(3-Nitrobenzyliden-37                                     amino-2-(3-ethoxycarbonyl-                                                  185(d)                                  2-thioureido)-benzene                                  1-Benzenesulfonicamido-2-38                                     (3-methoxycarbonyl-2-                                                  197-198(d)                                  thioureido)-benzene                                  1-(4-Toluenesulfonicamido)-39                                     2-(3-ethoxycarbonyl-2-                                                  179-180(d)                                  thioureido)-benzene                                  1-(4-Chlorobenzenesulfonic-40                                     amodo)-2-(3-methoxycarbonyl-                                                  192-193(d)                                  2-thioureido)-benzene S ∥                       2(3-Allyloxycarbonyl-2-41    CNHCOOCH2 CH=CH3       thioureido)-aniline                                                  138-139 SO ∥∥ NH--C--NH--C--O--CH3        1,2-Bis(3-methoxycarbonyl-42                                     2-thioureido)-benzene                                                  181.5-182.5(d)                                                  - NH--C--NH--C--O--                                                  CH3 ∥∥ SO SO ∥∥ NH--C--NH--C--O--C2 H5 1,2-Bis(3-ethoxycarbonyl-43                                     2-thioureido)-benzene                                                  195(d) NH--C--NH--C--O--C2 H5 ∥∥  SO SO ∥∥             1,2-Bis(3-isopropoxy- NH--C--NH--C--O--CH(CH3)2                                  carbonyl-2-thioureido)-                                                  205-206(d)44                                     benzene NH--C--NH--C--O--CH(CH3)2 ∥∥ SO SO ∥∥ NH--C--NH--C--O--CH2 CH(CH3)2                                  1,2-Bis(3-isobutoxycarbonyl-45                                     2-thioureido)-benzene                                                  197-198(d) NH--C--NH--C--O--CH2 CH(CH3)2 ∥∥ SO SO ∥∥             3,4-Bis(3-ethoxycarbonyl- NH--C--NH--C--O--C2 H5 2-thioureido) toluene                                                  175-176(d)46 NH--C--NH--C--O--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis(3-ethoxycarbonyl- NH--C--NH--C--O--C2 H5 2-thioureido)-4-                                                  170.5-171.5(d)47                                     chlorobenzene NH--C--NH--C--O--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis(3-ethoxycarbonyl- NH--C--NH--C--O--C2 H5 2-thioureido)-4-                                                  205-205.5(d)48                                     nitrobenzene NH--C--NH--C--O--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis(3-ethoxycarbonyl- NH--C--NH--C--O--C2 H5 2-thioureido)-4.5-                                                  206-207(d)49                                     dichlorobenzene NH--C--NH--C--O--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis(3-ethoxycarbonyl- NH--C--NH--C--O--C2 H5 2-thioureido)-3,4,6-                                                  180-18150                                     trichlorobenzen NH--C--NH--C--O--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis(3-benzyloxy- NH--C--NH--C--O--CH2        carbonyl-2-thioureido)-                                                  171-17251                                     benzene NH--C--NH--C--O--CH2 ∥∥ SO SO  ∥∥            1,2-Bis[3-(-β-Methoxy) NH--C--NH--C--O--CH2 CH2 OCH3                                  ethoxycarbonyl-2-thioureido]                                                  170.5-171.552                                     benzene NH--C--NH--C--O--CH2 CH2 OCH3 ∥∥ SO SO ∥∥             1,2-Bis[3-(β-chloroethoxy- NH--C--NH--C--C--C2 H4 Cl                                  carbonyl)-2-thioureido]                                                  181-182(d)53                                     benzene NH--C--NH--C--O--C2 H4 Cl ∥∥ SO SO ∥∥             1,2-Bis[(3-ethylthio)- NH--C--NH--C--S--C2 H5 carbonyl-2-thioureido]                                                  191-192(d)54                                     benzene NH--C--NH--C--S--C2 H5 ∥∥ SO SO ∥∥             1,2-Bis[3-dodecylthio) NH--C--NH--C--S--n-C12 H25                                  carbonyl]-thioureido-                                                  122-123.5(d)55                                     benzene NH--C--NH--C--S--n-C12 H25 ∥∥ SO SO ∥∥ NH--C--NH--C--O--CH2 CH=CH2                                  1,2-Bis(3-allyloxycarbonyl-56                                     2-thioureido) benzene                                                  166-167 NH--C--NH--C--O--CH2 CH=CH2 ∥∥ SO SO ∥∥             1,2-Bis[3-(2-Propynyloxy- NH--C--NH--C--O--CH2 --C.tbd.CH                                  carbonyl)-2-thioureido]                                                  172-173(d)57                                     benzene NH--C--NH--C--O--CH2 --C.tbd.CH ∥∥ SO SO ∥∥             1,2-Bis[3-(4-chlorophenoxy- NH--C--NH--C--O                  carbonyl)-2-thioureido]                                                  193(d)58                                     benzene NH--C--NH--C--O ∥∥ SO SO ∥∥             1,2-Bis[3-(4-nitrophenoxy- NH--C--NH--C--O                  carbonyl)-2-thioureido]                                                  186(d)59                                     benzene NH--C--NH--C--O ∥∥ SO SO ∥∥ NH--C--NH--C--O                  1,2-Bis[3-(4-methylphenoxy-60                                     carbonyl)-2-thioureido]-                                                  191-192(d) NH--C--NH--C--O                  4-chlorobenzene ∥∥ SO SO ∥∥ NH--C--NH--C--O--                3,4-Bis[3-(4-chlorophenoxy-61                                     carbonyl)-2-thioureido]-                                                  199-200(d) NH--C--NH--C--O--                toluene ∥∥ SO SO ∥∥             1,2-Bis[3-(2-naphthoxy- NH--C--NH--C--O                  carbonyl)-2-thioureido]                                                  191-192(d)62                                     benzene NH--C--NH--C--O ∥∥ SO SO ∥∥             1,2-Bis[3-(2-naphthoxy- NH--O--NH--C--O                  carbonyl)-2-thioureido]                                                  180(d)634'-nitrobenzene NH--O--NH--C--O ∥∥ SO                                  1-(3-Ethoxycarbonyl-2-                                  throureido)-2-(3-ethoxy-64                                     carbonyl-1-methyl-2-                                                  176-177(d)                                  throureido)-benzene                                  1,2-Bis(3-ethoxycarbonyl-1-65                                     methyl-2-thioureido)benzene SO                               1-(3-Ethoxycarbonyl-2- ∥∥             thioureido)-2-(3-methoxy- NH--C--NH--C--O--CH3        carbonyl-2-thioureido)-                                                  177-178(d)66                                     benzene NH--C--NH--C--O--C2 H5 ∥∥ SO__________________________________________________________________________ note: Symbol (d) means decomposition

The above compound may be used in connection with any carrier vehicle and in the form of a solution, capsule, tablet or bolus.

Among the compounds employed as an ingredient of this invention, the salts (e.g. compound 7 ˜ 12, 15, 16) have high solubility in water and then they can be added to the drinking water just before use, or a drench formulation can be prepared in advance which may be diluted up to the desired concentration. When the composition of the present invention is in the form of solution, liquid media, e.g. alcohols, acetone, dimethyl sulfoxide, dimethylformamide, dioxane and cyclohexanone can be used. In the drench or solution preparation, concentrations may be 10% - 40% wt/vol. The exact percentage used will depend upon the dosage level required and the limitation imposed on the volume to be administered.

When administered in powdered form, the anthelmintic ingredient may be dispersed in or admixed with standard elements of animal sustenance, such as feed, or other orally ingestible carriers, such as distiller's dried grains, corn meal, alfalfa, ground oyster shells, molasses solubles, or corn cob meal. This method is generally used when it is desired to administer the compounds either as therapeutic or prophylactic use over an extended period.

When the composition is used in the solid dosage forms such as a capsule, tablet, or bolus, the ingredient may be conveniently mixed with any other acceptable vehicles including diluents, fillers, binders and lubricants in the preparation of such forms, and preferably materials nutritionally suitable such as starch, lactose, magnesium stearate, vegetable gums, hydroxy alkyl cellulose and the like.

The proportion of the anthelmintic ingredients in the above forms of administration may vary widely depending upon the desired dosage sought to be administered to the infected host. Thus, tablets and boluses, whether enteric in nature or not, can incorporate, for example, in the ranges from 5%, to 80% of the anthelmintic ingredient by weight of the total composition. Although the dosage rate varies depending on the mode of treatment, the activity of the components, the size of the host and the severity of infection, when single unit dosage forms such as tablets, boluses, or drenches are desired to be administered to the animal, suitable results are obtained when the compositions contain enough of the anthelmintic ingredients of the present invention to provide a dosage level of from 0.1 ˜ 1000 and preferably 5 ˜ 500mg/Kg of animal body weight.

If desired, the course of treatment may be extended over a period of days in which case the optimum daily dose level is reduced.

The following examples are given for the purpose of illustration only.

EXAMPLE 1

A bolus having the following composition suitable for oral administration was prepared.

______________________________________Compound (I)     10       parts by weightDicalcium phosphate            3        "Starch           1.5      "Gum              0.3      "Talc             1        "Mg stearate      0.1      "______________________________________

The dicalcium phosphate was thoroughly mixed with the compound I and the mixture was pulverized to a particle size of less than 90 mesh. 1 part of starch was added to the mixture in the form of an aqueous starch paste and the resulting mixture was granulated in the usual manner. The granules were dried at 50°C. The guar gum and the balance of the starch were added and the mixture thoroughly blended. The remainder of the ingredients were then added and the whole completely mixed and compressed.

EXAMPLE 2.

A drench having the following composition

Compound 2       10       parts by weightPolyoxyethylenealkylphenol ether            0.1      "Silicone oil     0.02     "Starch           15.0     "

was prepared by blending the ingredients into dry mix and the resulting mixture was added to 300ml. of water gradually.

EXAMPLE 3.

A drench having the following composition was prepared by usual formulating methods.

______________________________________Compound 4       10       parts by weightSilicone oil     0.02     "Hydroxy propylcellulose        1.2      "Water            150      "______________________________________

EXAMPLE 4.

Tablets having the following composition were prepared by the conventional process.

______________________________________Compound 25      10       parts by weightCalcium phosphate            8        "Hydroxypropylcellulose        1.5      "Lactose          80       "______________________________________

Hydroxypropylcellulose was dissolved into alcohol and the resulting solution was sprayed to the dry mix of the ingredients. After removing the solvent, the mixture was granulated in the usual manner and compressed to tablets having 0.2g of weight.

EXAMPLE 5.

Feed supplements according to the following compositions were prepared by the conventional process.

______________________________________(1)  Compound 12     15Exoleated soybean                85(2)  Compound 42      5Wheat bran      95(3)  Compound 43     10Rice bran       90(4)  Compound 44     25Corn grain      75______________________________________

EXAMPLE 6.

50 parts of compound 66 was mixed with 50 parts of tricalcium phosphate. Then the resulting powder was subdivided and loaded into hard gelatin capsules in such a manner that each capsule contains the equivalent of 200mg of the active ingredient.

EXAMPLE 7.

The anthelmintic ingredients listed in Table 2 were mixed with the dog food consisting of imitation meat. The dogs naturally infected with toxocara canis were divided into groups consisting of three dogs and after checking the number of eggs in 1g of excrement of each dog, the above food was fed in such manner that the each dog received 50mg of the anthelmintic ingredient/Kg of body weight/day for 3 days. Egg counts were made on the third day following the last treatment. Results are tabulated below in Table 2.

              Table 2______________________________________          Eggs (average)Compound   Dosage       Before      After                Medication  Medication______________________________________1       50mg/Kg/day  3,960        02       "            4,110        04       "            4,120       1608       "            3,780        09       "            3,900        013      "            4,100       17516      "            3,970       20517      "            4,250        018      "            4,080        3520      "            3,890        521      "            4,040       12522      "            3,770        1025      "            3,810        5027      "            4,200        3529      "            4,190       14530      "            3,920       21031      "            3,750       19033      "            4,150       20534      "            4,130       18035      "            3,920        7536      "            4,030        6538      "            4,050        539      "            3,860        041      "            4,260        5542      "            5,200       17543      "            4,850        056      "            5,150       18566      "            4,920       155Piperazine   200mg/Kg/day 4,780       535Control None         4,860       4,800______________________________________

No secondary effect or change on excrement, blood and appetite was observed.

EXAMPLE 8.

Oral administration of the anthelmintic ingredients as a drench according to the composition of Example 2 to sheep which were naturally infected with gastrointeslinal nematodes was performed for three days at levels of 50mg of the anthelmintic ingredient /Kg of body weight/day. A dose of the same ingredients was given to a group consisting of three sheep and the results of the egg count before and after third day of treatment are tabulated below in Table 3.

              Table 3______________________________________          Eggs (average)Compound   Dosage       Before      After                Medication  Medication______________________________________1       50mg/Kg/day  2,410        02       "            2,940        03       "            2,500       1205       "            2,050        806       "            2,420       1057       "            2,770        408       "            2,490        09       "            2,130        010      "            2,640        011      "            2,280        012      "            1,960       12513      "            2,500       14014      "            3,450        7515      "            2,750       16017      "            2,120        018      "            2,850        8019      "            1,970       10522      "            2,300        5523      "            2,570       11524      "            1,980       18025      "            3,080        7026      "            1,910        027      "            2,570        4028      "            3,110        7529      "            2,640       20530      "            2,530        034      "            2,010       16037      "            2,530        040      "            2,900        041      "            2,370        6042      "            2,470        043      "            1,990        044      "            3,250       11545      "            2,400       18046      "            2,540       12048      "            1,900        4549      "            2,690       16050      "            2,540       12551      "            3,080        8052      "            2,130        5553      "            2,440        054      "            1,970       19055      "            2,750       18056      "            3,100       12557      "            2,500       10058      "            2,200        059      "            2,450        8560      "            1,910        061      "            2,760        062      "            2,070       19063      "            2,430        9064      "            3,400       12565      "            2,290        4066      "            2,850        0Control None         2,280       2310"       None         3,250       3010"       None         2,890       2960______________________________________

No secondary effect or change on excrement, blood and appetite was observed.