Synthesis of Functionalized Benzo[b]thiophenes by the Intramolecular Copper-Catalyzed Carbomagnesiation of Alkynyl(aryl)thioethers
作者:Thomas Kunz、Paul Knochel
DOI:10.1002/anie.201106734
日期:2012.2.20
Highly functional: A copper(I)‐catalyzed intramolecular carbomagnesiation under mild conditions transforms readily available alkynyl(aryl)thioethers into magnesiated benzothiophenes. Subsequent reaction with various electrophiles (acid chlorides, allyl bromides, aryl halides) provides polyfunctional benzo[b]thiophenes (see scheme). Further modification of the cyclization products affords highly diversified
高度功能化:在温和条件下,铜(I)催化的分子内碳镁化作用可将易得的炔基(芳基)硫醚转变成镁化的苯并噻吩。随后与各种亲电试剂(酰氯,烯丙基溴,芳基卤化物)反应,可得到多官能的苯并[ b ]噻吩(请参见方案)。环化产物的进一步修饰提供了高度多样化的苯并噻吩衍生物和新的杂环支架。