申请人:Takeda Chemical Industries, Ltd.
公开号:EP1266881A1
公开(公告)日:2002-12-18
A process suitable for safely mass-producing, through a short step, cyclic compounds useful in medicines, agricultural chemicals, foods, cosmetics, and chemical products or as intermediates therefor. The process, which is for producing a compound represented by the formula:
wherein Z represents an electron-attracting group; W represents optionally substituted ethylene or optionally substituted vinylene; R3 represents hydrogen or an optionally substituted hydrocarbon group; and X represents a divalent group [provided that when W represents optionally substituted vinylene, then -X-CH2 -Z is not -X1 -X2 -CH2 -Z (wherein X1 represents sulfur or optionally substituted nitrogen and X2 represents optionally substituted ethylene)]} or a salt thereof, is characterized by subjecting a compound represented by the formula (II) or a salt thereof:
(wherein the symbols have the same meanings as the above) to a ring closure reaction in a solvent containing a carbonic diester.
一种适用于通过短步骤安全地大量生产用于医药、农药、食品、化妆品和化学产品或其中间体的环状化合物的工艺。该工艺用于生产由式表示的化合物:
其中 Z 代表引电子基团;W 代表任选取代的乙烯或任选取代的乙烯基;R3 代表氢或任选取代的烃基;X 代表二价基团[但当 W 代表任选取代的乙烯时,则 -X-CH2 -Z 不是 -X1 -X2 -CH2 -Z(其中 X1 代表硫或任选取代的氮,X2 代表任选取代的乙烯)]}或其盐,其特征在于将式(II)代表的化合物或其盐:
(其中符号的含义与上述相同)在含有碳酸二酯的溶剂中进行闭环反应。