Reactions of 6-aminopyrimidin-4(3H)-ones with electron-deficient alkenyl derivatives. Easy preparation of heterocyclic analogues of Sangivamicine
摘要:
The electron-deficient maleic derivatives, maleic anhydride and maleimide, act against 6-aminopyrimidines almost exclusively as activated alkenyl derivatives, affording Michael adducts which in the case of less reactive maleimide are stable and can be isolated, and in the case of maleic anhydride those adducts evolve to pyrrolo[2,3-d]pyrimidines. Dienophilic character of maleimide towards 6-aminopyrimidin-4(3H)-one could also be observed in one case, where a pyrrolo[3,4-c]pyridine derivative was isolated. (C) 1998 Elsevier Science Ltd. All rights reserved.
Reactions of 6-aminopyrimidin-4(3H)-ones with electron-deficient alkenyl derivatives. Easy preparation of heterocyclic analogues of Sangivamicine
作者:Justo Cobo、Adolfo Sánchez、Manuel Nogueras
DOI:10.1016/s0040-4020(98)00263-4
日期:1998.5
The electron-deficient maleic derivatives, maleic anhydride and maleimide, act against 6-aminopyrimidines almost exclusively as activated alkenyl derivatives, affording Michael adducts which in the case of less reactive maleimide are stable and can be isolated, and in the case of maleic anhydride those adducts evolve to pyrrolo[2,3-d]pyrimidines. Dienophilic character of maleimide towards 6-aminopyrimidin-4(3H)-one could also be observed in one case, where a pyrrolo[3,4-c]pyridine derivative was isolated. (C) 1998 Elsevier Science Ltd. All rights reserved.