Synthesis of 1-Acyl-3,4-dihydroquinazoline-2(1<i>H</i>)-thiones by Cyclization of<i>N</i>-[2-(Isothiocyanatomethyl)phenyl] Amides Generated<i>in situ</i>from<i>N</i>-[2-(Azidomethyl)phenyl] Amides
作者:Kazuhiro Kobayashi、Naoki Matsumoto
DOI:10.1002/hlca.201400078
日期:2014.7
An efficient method for the preparation of 1‐acyl‐3,4‐dihydroquinazoline‐2(1H)‐thiones 5 has been developed. The reaction of N‐[2‐(azidomethyl)phenyl] amides 3, easily prepared by a three‐step sequence starting with (2‐aminophenyl)methanols, with Ph3P, followed by CS2, allowed generation of N‐[2‐(isothiocyanatomethyl)phenyl]‐amide intermediates 4, which underwent cyclization on treatment with NaH to
已经开发出一种有效的方法来制备1酰基3,4二氢喹唑啉2(1 H)硫酮5。N- [2-(叠氮基甲基)苯基]酰胺3的反应很容易,可以通过三步法制备,从(2-氨基苯基)甲醇开始,与Ph 3 P,然后是CS 2,可以生成N- [2 -(异硫氰酸根合甲基)苯基]-酰胺中间体4,用NaH处理后进行环化,以通常的高收率提供相应的所需产品。