Synthesis of Benzo[b]thiophenes by Cyclization of Arylketene Dithioacetal Monoxides under Pummerer-like Conditions
摘要:
Treatment of arylketene bis(methylthio)acetal monoxide with trifluoromethanesulfonic anhydride leads to ring-closure to afford 2-methylthiobenzo-[b]thiophene in high yield. The reaction is useful for synthesizing multisubstituted benzo[b]thiophenes.
Synthesis of Diverse Aromatic Ketones through C−F Cleavage of Trifluoromethyl Group
作者:Mai Ikeda、Tsubasa Matsuzawa、Takamoto Morita、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1002/chem.202001816
日期:2020.9.25
An efficient synthetic method of aromatic ketones through C−F cleavage of trifluoromethylgroup is disclosed. The high functional group tolerance of the transformation and the remarkable stability of trifluoromethylgroup in various reactions enabled multi‐substituted aromatic ketone synthesis in an efficient route involving useful transformations such as ortho‐lithiation, aryne chemistry, and cross‐couplings