Mechanistic Study of a Complementary Reaction System that Easily Affords Quinazoline and Perimidine Derivatives
作者:Zerong Daniel Wang、Joshua Eilander、Motoko Yoshida、Tianzhi Wang
DOI:10.1002/ejoc.201402854
日期:2014.12
consistent with our computational study on the thermal decomposition of thiourea to form hydrogen sulfide and carbodiimide. This reaction involves a coupling between 2-aminobenzophenone and carbodiimide generated in situ from thiourea to form 4-phenylquinazolin-2(1H)-imine intermediate, and the generation of sulfur-containing reducing agent from hydrogen sulfide and DMSO, which reduces 4-phenylquinazolin-2(1H)-imine
2-氨基二苯甲酮和硫脲在二甲亚砜 (DMSO) 中的新反应已经开发出来,主要提供 4-苯基喹唑啉作为单一产品。该反应一般也适用于硫脲与构象受限的 β-氨基酮,如 1-氨基蒽-9,10-二酮和 1-氨基-9H-芴-9-one 之间的反应,以制备 perimidine衍生品。实验数据与我们对硫脲热分解形成硫化氢和碳二亚胺的计算研究一致。该反应包括 2-氨基二苯甲酮与硫脲原位生成的碳二亚胺偶联形成 4-苯基喹唑啉-2(1H)-亚胺中间体,以及硫化氢和 DMSO 生成含硫还原剂,还原 4-苯基喹唑啉-2(1H)-亚胺至 4-苯基-1,2-二氢喹唑啉-2-胺。从后者消除氨产生4-苯基喹唑啉。