A new dimerization reaction producing 2-amino-9-oxopyrrolo-[2,1-<i>b</i>]quinazoline-1-carbonitriles and analogous pyrrolo-[1,2-<i>a</i>]thieno[3,2-<i>d</i>] pyrimidinecar bonitriles
作者:Michael Gütschow、James C. Powers
DOI:10.1002/jhet.5570380217
日期:2001.3
2-alkylthio-4-oxothieno[3,2-d]pyrimidine-3-acetonitriles 8 was prepared. Upon treatment with sodium hydride, compounds 4 and 8 react to give 2-amino-4,9-dihydro-9-oxopyrrolo[2,1-b]quinazoline-1-carbonitriles 9 and 6-amino-4,9-dihydro-9-oxopyrrolo[1,2-a]thieno[3,2-d]pyrimidine-7-carbonitriles 10, respectively. The transformation of compounds 4 and 8 to the tricyclic aminonitriles 9 and 10 involves a dimerization step
制备一系列2-烷硫基-4-氧代-3-喹唑啉乙腈4和2-烷硫基-4-氧代噻吩并[3,2 - d ]嘧啶-3-乙腈8。经氢化钠处理后,化合物4和8反应生成2-氨基-4,9-二氢-9-氧吡咯并[2,1- b ]喹唑啉-1-腈9和6-氨基-4,9-二氢-分别为9-氧吡咯并[1,2- a ]噻吩并[3,2 - d ]嘧啶-7-腈10。化合物4和8向三环氨基腈9和10的转化涉及二聚步骤,然后吡咯环化。用氢化钠处理后的叔丁酯衍生物4d和8d经过Thorpe-Ziegler环化反应,以提供作为主要产物的稠合的1,3-噻嗪的对氨基酯(分别为16和17)。