CLAY-CATALYZED THIOALKYLATION OF THIOPHENES AND BENZO[<i>b</i>]THIOPHENES
作者:Peter D. Clark、Shaun T. E. Mesher、Alex Primak
DOI:10.1080/10426509608046415
日期:1996.7.1
which 2,3,5-tris(methylthio)thiophene (4a) and tetrakis(methylthio)thiophene (5) could be isolated in modest yield. Prolonging the reaction time gave (4a) and 5 in isolated yields of 21 and 16% respectively. Carrying out the same reaction in a sealed autoclave at 150°C with an air overpressure resulted in a clean and rapid (5 h) conversion of thiophene to the tetramethylthio-derivative 5 in moderate isolated