Ultrasound promoted Barbier reactions and Csp(3)-Csp(2) Stille coupling for the synthesis of diarylmethanes and substituted benzophenones

作者：Ocampo Romina A; Koll Liliana C^*; Mandolesi Sandra D

来源：Ultrasonics Sonochemistry, 2013, 20(1): 40-46.

DOI：10.1016/j.ultsonch.2012.06.014

• Benzyltin compounds
• Barbier reaction
• Ultrasound
• Stille coupling
• Diarylmethanes
• Benzophenones

Here we present the preparation of a variety of diarylmethanes obtained via ultrasound Stille coupling under palladium catalysis between some substituted aryl compounds and benzyltributyltin compounds generated through sonicated Barbier reaction in a very short time reaction and excellent yield. The study reported below compares different methods to optimize the synthesis of usually unstable benzyltin derivatives and is another contribution to the investigation of Csp(3)-Csp(2) coupling process involving benzyl-aryl reagents. Substituted carboxylated benzophenones were easily prepared in a very good yield by oxidation of some diarylmethanes.

• 出版日期2013-1