Metallation reactions. XXXVI. A study on the metallation of (methylthio)- and (methylsulfonyl)thiophenes
作者:Claudia Fattuoni、Michele Usai、Maria G. Cabiddu、Enzo Cadoni、Stefania De Montis、Francesca Sotgiu、Salvatore Cabiddu
DOI:10.1002/jhet.5570440316
日期:2007.5
Methylthio- and methylsulfonyl thiophenes were polymetallated by n-buthyllithium and superbase (LICKOR) in one-step. 2-(Methylthio)thiophene was bimetallated in 5 and in alpha to the methylthio sulfur atom by superbase. 3-(Methylthio)thiophene was bimetallated in both 2 and 5 positions by the organolithium and trimetallated in these two positions and in alpha to the thioethereal sulfur atom by superbase