申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP0812846A1
公开(公告)日:1997-12-17
The invention is concerned with a new process for the preparation of compounds of formula
wherein
R1is trityl, acetyl, tetrahydropyranyl or cyclopentyl;
R2is hydrogen, hydroxy, lower alkyl, cycloalkyl, lower alkoxy, lower alkenyl, lower alkynyl, aryl, aryloxy, aryl-lower alkyl, aryl-lower alkoxy or heterocyclyl or heterocyclyl-lower alkyl; the lower alkyl, cycloalkyl, lower alkoxy, lower alkenyl, cycloalkenyl, lower alkynyl, aryl-lower alkyl, aryl, aryloxy, aryl-lower alkoxy, the heterocyclyl moieties being unsubstituted or substituted with at least one group selected from carboxy, amino, nitro, cyano, lower alkyl, lower alkoxy, hydroxy, halogen, -CONR21R22, -N(R22)COOR23, R22CO-, R22OCO- or R22COO-, wherein R21 is hydrogen, lower alkyl, or cycloalkyl; R22 is hydrogen or lower alkyl; R23 is lower alkyl, lower alkenyl or a carboxylic acid protecting group;
Yis -S- and Z is -CH2- or
Yis -CH2- and Z is -O-,
by acylation of a compound of formula
with an activated carboxylic acid derivative of formula
wherein R3 is lower alkyl, and R1, R2, X, Y, Z have the significance given above;
and it is further concerned with compounds of formula III.
本发明涉及一种制备式化合物的新工艺
式中
R1是三烷基、乙酰基、四氢吡喃基或环戊基;
R2是氢、羟基、低级烷基、环烷基、低级烷氧基、低级烯基、低级炔基、芳基、芳氧基、芳基-低级烷基、芳基-低级烷氧基或杂环基或杂环基-低级烷基;低级烷基、环烷基、低级烷氧基、低级烯基、环烯基、低级炔基、芳基-低级烷基、芳基、芳氧基、芳基-低级烷氧基、杂环烷基未被取代或被至少一个选自羧基的基团取代、氨基、硝基、氰基、低级烷基、低级烷氧基、羟基、卤素、-CONR21R22、-N(R22)COOR23、R22CO-、R22OCO- 或 R22COO-,其中 R21 为氢、低级烷基或环烷基;R22 是氢、低级烷基;R23 是低级烷基、低级烯基或羧酸保护基团;
Y 是-S-,Z 是-CH2- 或
Y为-CH2-,Z为-O-、
通过式化合物的酰化
与活化的式羧酸衍生物发生酰化反应
其中 R3 为低级烷基,R1、R2、X、Y、Z 具有上述含义;
进一步涉及式 III 的化合物。