Preparation of furan derivative
专利汇可以提供Preparation of furan derivative专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the title compound, useful as a raw material for agricultural chemicals, medicines and various kinds of synthetic chemicals advantageously, by the reaction of a specific trithiocyclopropenium salt with a specific hydroxy compound, in the presence of a base according to the ring-enlargement reaction.
CONSTITUTION: The compound of formula I (R
1 is alkyl; X
- is anion) is reacted with preferably an equimolar amount of the compound of formula II (R
2 is acyl, e.g. acetyl or benzoyl) based on the compound of formula I, usually in a suitable solvent, in the presence of a base, e.g. a tertiary amine (diazabicycloundecene), or metal alkoxide (t-butoxy-potassium), at 0W100°C, in the neighborhood of room temperature, to obtain the object compound of formula III according to the ring- enlargement reaction of the compound of formula I. The compound of formula III is further treated with hydrogen in the presence of a metal catalyst, e.g. Raney nickel, to give the corresponding furan derivative by the removal of SR
1 groups.
COPYRIGHT: (C)1980,JPO&Japio，下面是Preparation of furan derivative专利的具体信息内容。
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