α-Oxoketene Dithioacetals Mediated Benzoannelation of Aromatic Heterocycles: an Efficient Regiocontrolled Synthesis of Highly Substituted and Polycyclic Benzo[b]thiophenes
作者:J.R. Suresh、Okram Barun、H. Ila、H. Junjappa
DOI:10.1016/s0040-4020(00)00722-5
日期:2000.10
An efficient regiocontrolled synthesis of highly substituted and complex polycyclic benzo[b]thiophenes has been developed via our benzoannelation strategy involving conjugate addition–displacement on a variety of α-oxoketenedithioacetals by carbanions derived from 2- and 3-cyanomethylthiophenes followed by acid induced cyclization of the resulting conjugate adducts.
通过我们的苯甲酰化策略,开发了一种高效的区域控制的合成方法,该方法可控制区域取代基和复杂的多环苯并[ b ]噻吩,包括通过2-和3-氰基甲基噻吩的碳负离子在各种α-氧杂环丁烯二硫缩醛上进行共轭加成-置换,然后进行酸诱导的环化反应生成的共轭加合物。