AN IMPROVED PROCEDURE FOR THE PREPARATION OF N-ARYL SUBSTITUTED 4<i>H</i>-1,4-BENZOTHIAZINE 1,1-DIOXIDE DERIVATIVES
作者:Simon E. Lopez、M. Valentina Godoy、Neudo Urdaneta、Monica Rosales
DOI:10.1080/10426500008044994
日期:2000.1
Abstract An improved procedure for the synthesis of N-aryl substituted 4H-1,4-benzothiazine 1,1-dioxide 2-carboxylic acid-esters derivatives is reported. In this new, efficient methodology. silver nitrate was used as a catalyst for the cyclization of N-aryl-phenylsulfonyl-acrylates 6–11 using potassium carbonate in dimethylformamide to the corresponding title compounds in high yields.
摘要 报道了一种用于合成 N-芳基取代的 4H-1,4-苯并噻嗪 1,1-二氧化物 2-羧酸酯衍生物的改进方法。在这种新的、有效的方法论中。硝酸银用作催化剂,在二甲基甲酰胺中使用碳酸钾将 N-芳基-苯磺酰基-丙烯酸酯 6-11 环化成相应的标题化合物,收率很高。