Single step synthesis of 2,3-dialkyl-6-nitro-quinazolin-4(3H)-imines and 3,5-dialkyl-9-nitro-imidazo[1,2-c]quinazolin-2(3H)-ones
作者:Emanuela Erba、Donato Pocar、Pasqualina Trimarco
DOI:10.1016/j.tet.2005.04.028
日期:2005.6
A single step synthesis of 2,3-dialkyl-6-nitro-quinazolin-4(3H)-imines and 3,5-dialkyl-9-nitro-imidazo-[1,2-c]-quinazolin-2(3H)-ones from simple carbonyl compounds, primary amines or amino acid methyl esters and 2-azido-5-nitro-benzonitrile was developed. Key intermediates were N,N′-disubstituted amidines obtained by rearrangement of 4,5-dihydrotriazoles; the new heterocyclic rings were formed by spontaneous
2,3-二烷基-6-硝基喹唑啉-4(3 H)-亚胺和3,5-二烷基-9-硝基咪唑-[1,2 - c ]-喹唑啉-2(3 )的一步合成由简单的羰基化合物,伯胺或氨基酸甲酯和2-叠氮基-5-硝基-苄腈开发了H)-酮。关键中间体是通过4,5-二氢三唑的重排获得的N,N'-二取代am;新的杂环是通过中间体中存在的氨基和氰基的自发分子内反应形成的。