作者:Qian Zhao、Chao Qian、Xin-Zhi Chen
DOI:10.1080/10426507.2012.717140
日期:2013.7.1
A convenient and efficient synthesis of 2-substituted benzo[b]thiophenes is described. This one-step reaction of alkylthiobenzaldehyde and activated electrophiles proceeded smoothly in toluene at 120 degrees C with magnesium oxide as a catalyst. The target 2-substituted benzo[b]thiophenes are obtained in moderate yields and the side reaction is inhibited via azeotropic distillation. According to the experiments, a plausible mechanism is presented.