Synthesis of (4-chlorophenyl)-(1-oxo-1λ4-benzo[b]thien-2-yl)methanone and study of its reactivity towards sulfur- and oxygen-containing nucleophiles
作者:Pascale Pouzet、Irene Erdelmeier、Patrick M. Dansette、Daniel Mansuy
DOI:10.1016/s0040-4020(98)00929-6
日期:1998.12
(4-Chlorophenyl)-(1-oxo-1λ4-benzo[b]thien-2-yl)methanone 2a was synthesized by oxidation of the corresponding benzo[b]thiophene derivative 2 with the oxidative system . This benzo[b]thiophene sulfoxide undergoes Michael-type nucleophilic addition of sulfur- and oxygen-containing nucleophiles either under basic conditions leading to 2,3-dihydro-3-substituted-benzo[b]-thiophene 1-oxides or in acidic
(4-氯苯基) - (1-氧代- 1λ 4 -苯并[b]噻吩-2-基)甲酮2a中通过相应的苯并[b]噻吩衍生物的合成氧化2与氧化系统。该苯并[b]噻吩亚砜在碱性条件下经历了含硫和氧的亲核试剂的迈克尔型亲核加成反应,从而生成了2,3-二氢-3-取代的苯并[b]-噻吩1-氧化物或在酸性介质中然后导致了重新瘤化的3-取代的苯并[b]噻吩。该方法提供了2-酰基-苯并[b]噻吩衍生物的简单两步官能化。