Synthesis of 2-Aryl-2,3-dihydro-3-sulfanyl-1H-isoindol-1-ones by Pummerer-Type Cyclization of N-Aryl-2-(sulfinylmethyl)benzamides
作者:Kazuhiro Kobayashi、Hiroo Hashimoto、Teruhiko Suzuki、Hisatoshi Konishi
DOI:10.1002/hlca.201100204
日期:2011.11
An efficient method for the synthesis of 2‐aryl‐2,3‐dihydro‐3‐sulfanyl‐1H‐isoindol‐1‐ones 1 via Pummerer‐type cyclization of N‐aryl‐2‐(sulfinylmethyl)benzamides 2 is described. Thus, treatment of these sulfinyl‐benzamides 2, easily prepared from 2‐(bromomethyl)benzoates 3 in three steps, with Ac2O at ca. 100° resulted in the formation of the desired isoindolones 1 in generally good yields.
对于2-芳基-2,3-二氢-3-硫烷基- 1合成的有效方法ħ -异吲哚-1-酮1 经由Pummerer重的环化型ñ -芳基- 2-(亚磺酰基甲基)苯甲酰胺2进行说明。因此,这些亚磺酰基-苯甲酰胺2的处理可以很容易地分三步从2-溴甲基苯甲酸3制备,并用Ac 2 O于大约2 。100℃导致形成期望的异吲哚酮的1在通常良好的产率。