Synthesis of 2-Substituted 3-Alkylidene-2,3-dihydro-1<i>H</i>-isoindol-1-imines through Cyclization of [1-(2-Cyanophenyl)alkylidene]aminide Intermediates Generated from the Reaction of 2-(1-Azidoalkyl)benzonitriles with NaH
作者:Kazuhiro Kobayashi、Kosuke Ezaki、Ippei Nozawa
DOI:10.1002/hlca.201400261
日期:2014.12
convenient sequence for the preparation of 3‐alkylidene‐2,3‐dihydro‐1H‐isoindol‐1‐imine derivatives 6 has been developed. Thus, 2‐(1‐azidoalkyl)benzonitriles 2, readily accessible from 2‐alkylbenzonitriles, are allowed to react with NaH in DMF at 0° to room temperature to generate [1‐(2‐cyanophenyl)alkylidene]aminide intermediates 3, of which cyclization and the subsequent rearrangement, followed by
已开发出制备3-亚烷基-2,3-二氢-1 H-异吲哚-1-亚胺衍生物6的简便方法。因此,允许从2-烷基苄腈容易获得的2-(1-叠氮烷基)苄腈2与DMH中的NaH在0°至室温下反应生成[1-(2-氰基苯基)亚烷基]酰胺中间体3,环化和随后的重排,再用卤代烷进行烷基化,可得到通常为中等收率的2-取代的1-亚烷基-2,3-二氢-1 H-异吲哚-2-亚胺6。