Carbanion-Induced Base-Catalyzed Synthesis of 1<i>H</i>-Isothiochromenes, Benzo[<i>c</i>]thiochromenes, Benzo[<i>c</i>]chromenes, and 1-Benzothiophenes through Ring-Transformation Reactions of 6-Aryl-2<i>H</i>-pyran-2-ones<sup>†</sup>
作者:Vishnu Ji Ram、P. Srivastava、Abhishek S. Saxena
DOI:10.1021/jo0100648
日期:2001.8.1
An innovative approach to the one-pot synthesis of highly functionalized 3,4-dihydro-1H-isothiochromenes (3), 6H-benzo[c]thiochromenes (5, 6), 6H-benzo[c]chromenes (8), and 2,3-dihydro-1-benzothiophenes (10, 11) is delineated from the reaction of a suitably functionalized 6-aryl-3-carbomethoxy-4-methylthio-2H-pyran-2-one (1) and a carbanion generated from tetrahydrothiopyran-4-one, 4-thiochromanone
一种一锅合成高功能化3,4-二氢-1H-异噻吩酮(3),6H-苯并[c]噻吩酮(5,6),6H-苯并[c]苯酮(8)和由合适的官能化的6-芳基-3-芳基-3-羰基甲氧基-4-甲硫基-2H-吡喃-2-酮(1)与由其生成的碳负离子的反应描述了2,3-二氢-1-苯并噻吩(10,11)四氢噻喃-4-酮,4-噻吩酮,4-苯并吡喃酮和四氢噻吩-3-酮通过环转化反应。