申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0518439A2
公开(公告)日:1992-12-16
A process for the preparation of a compound of general formula
wherein X represents a cyano group, a group -COOH or a salt, ester or amido derivative thereof, R¹ represents a hydrogen atom or an optionally substituted alkyl group, R² represents an optionally substituted alkyl or phenyl group, Z represents an alkyl group or a halogen atom and n represents 0, 1, 2, 3 or 4, the process comprising reacting a compound of general formula
with a first reactant capable of both dehydrating the amide group of said compound of general formula IV, to form a group X wherein X represents a cyano group, and reacting with the carboxy group of said compound of general formula IV to form a group with which a compound of general formula R¹R²NH may react; subsequently reacting the resulting compound with a compound of general formula R¹R²NH to form a compound of general formula III wherein X represents a cyano group; and optionally derivatising that compound to form other compounds of general formula III, is disclosed.
一种通式化合物的制备方法
其中 X 代表氰基、基团-COOH 或其盐、酯或氨基衍生物,R¹ 代表氢原子或任选取代的烷基,R² 代表任选取代的烷基或苯基,Z 代表烷基或卤素原子,n 代表 0、1、2、3 或 4,该工艺包括使通式化合物发生反应
与能使通式 IV 所述化合物的酰胺基脱水以形成基团 X(其中 X 代表氰基)并与通式 IV 所述化合物的羧基反应以形成可与通式 R¹R²NH 的化合物反应的基团的第一反应物反应;随后将所得化合物与通式 R¹R²NH 的化合物反应以形成通式 III 的化合物(其中 X 代表氰基);并任选衍生该化合物以形成通式 III 的其他化合物。