Phosphonic acid dialkyl ester containing diols |
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| 申请号 | US3485897D | 申请日 | 1968-04-29 | 公开(公告)号 | US3485897A | 公开(公告)日 | 1969-12-23 |
| 申请人 | KALK CHEMISCHE FABRIK GMBH; | 发明人 | JENKNER HERBERT; | ||||
| 摘要 | Diols of formula where R is C1- 10 alkyl, bromoalkyl or chloro-alkyl (same or different) and n is 0 to about 2000, or isomers thereof in which one or more repeating units are reversed, are prepared by reacting with in a molar ratio of about 1:1 to 1:2001 in the presence of a Friedel-Crafts catalyst at 40-120 DEG C. while passing an inert gas through the mixture.ALSO:Polyethers of formula where R is C1- 10 alkyl, bromoalkyl or chloroalkyl (same or different) and n up to about 2000, or isomers thereof in which one or more repeating units are reversed, are prepared by reacting with in a molar ratio of about 1:1 to 1:2001 in the presence of a Friedel-Crafts catalyst at 40-120 DEG C. while passing an inert gas through the mixture. Diethyl epoxypropylphosphonate is prepared from triethyl phosphite and epibromohydrin and hydrolysed to diethyl dihydroxypropylphosphonate. | ||||||
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| 说明书全文 | |||||||
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