The invention provides a process for the manufacture of substituted maleimides of the formula
wherein R1 represents alkyl, aryl or heteroaryl and R2 represents hydrogen, alkyl, alkoxycarbonyl, aryl or heteroaryl,
by reacting an activated glyoxylate of the formula
wherein R1 has the above significance and X represents a leaving atom or group, with an imidate of the formula
wherein R2 has the above significance, R3 represents alkyl,
aryl or trialkylsilyl and Y represents oxygen or sulphur, in the presence of a base and, after treating a reaction product obtained in which R2 represents hydrogen or alkyl with a strong base, hydrolyzing and dehydrating the resulting hydroxy - pyrrolinone of the formula
wherein R1, R2, R3 and Y have the above significance.
The substituted maleimides of formula I are pharmacologoically active, for example as protein kinase C inhibitors useful e.g. in the treatment and prophylaxis of inflammatory, immunological, bronchopulmonary and cardiovas - cular disorders, or as antiproliferative agents useful e.g. in the treatment of immune diseases and allergic disorders.
本发明提供了一种制造式如下的取代马来
酰亚胺的工艺
其中 R1 代表烷基、芳基或杂芳基,R2 代表
氢、烷基、烷
氧羰基、芳基或杂芳基、
使式中的活化
乙醛酸酯反应
其中 R1 具有上述意义,X 代表离去原子或基团,与式中的
亚胺酯反应
其中 R2 具有上述意义,R3 代表烷基、
其中 R2 代表
氢或烷基,R3 代表烷基、芳基或三烷基
硅基,Y 代表
氧或
硫。
其中 R1、R2、R3 和 Y 具有上述意义。
式 I 的取代马来
酰亚胺具有药理活性,例如可作为蛋白激酶 C
抑制剂用于治疗和预防炎症、免疫学、支气管肺病和心血管疾病,或作为抗增殖剂用于治疗免疫性疾病和过敏性疾病。