A Convenient Synthesis of 2,3-Dihydro-3-methylidene-1H-isoindol-1-ones by Reaction of 2-Formylbenzonitriles with Dimethyloxosulfonium Methylide
作者:Kazuhiro Kobayashi、Kota Matsumoto、Daizo Nakamura、Shuhei Fukamachi、Hisatoshi Konishi
DOI:10.1002/hlca.201000035
日期:——
A facile method for the synthesis of 2,3‐dihydro‐3‐methylidene‐1H‐isoindol‐1‐one and its derivatives carrying substituent(s) at C(5) and/or C(6) has been developed. The reaction of 2‐formylbenzonitrile (1a) with dimethyloxosulfonium methylide, generated by the treatment of trimethylsulfoxonium iodide with NaH in DMSO/THF at 0°, resulted in the formation of 2,3‐dihydro‐3‐methylidene‐1H‐isoindol‐1‐one
已经开发了一种简便的合成2,3-二氢-3-亚甲基-1H-异吲哚-1-酮及其衍生物的方法,该衍生物在C(5)和/或C(6)处带有取代基。在DMSO / THF中,用NaH在0°下用NaH处理三甲基碘化ox碘化物,生成了2-甲酰基苄腈(1a)与二甲基ox氧基methyl甲基化物的反应,导致形成了2,3-二氢-3-3-亚甲基-1H-异吲哚- 1‐1(2a),产率77%。类似地,六在C(4)和/或C(5),携带取代基(一个或多个)2-formylbenzonitriles即,1B - 1克,也得到相应的预期产品2B - 2克在可比的产率。