Synthesis of Diarylmethanes through Palladium-Catalyzed Coupling of Benzylic Phosphates with Arylsilanes
摘要:
An efficient approach to the benzylation of arenes has been developed. The reactions described provide straightforward access to diarylmethanes through Pd-catalyzed coupling of benzylic phosphates with arylsilanes in good to excellent yields. The reaction tolerates a wide range of functionalities such as halide, alkoxyl, and nitro groups.
Friedel-Crafts Benzylation of Activated and Deactivated Arenes
作者:Gabriel Schäfer、Jeffrey W. Bode
DOI:10.1002/anie.201105380
日期:2011.11.11
going back makes possible facile Friedel–Craftsbenzylations with moderate reaction temperatures, simple reaction workups, and improved substrate scope for the formation of synthetically important diarylmethanes (see scheme). Upon complexation with BF3⋅OEt2, hydroxamates serve as reversible leaving groups that stabilize highly reactive carbocations. Even deactivatedarenes and electron‐deficient benzylhydroxamates