Asymmetric Synthesis of 3,3-Diarylpropanals with Chiral Diene−Rhodium Catalysts
摘要:
A general route to enantioenriched 3,3-diarylpropanals is presented. These useful building blocks are prepared via an asymmetric rhodium-catalyzed conjugate addition of arylboronic acids to cinnamaldehyde derivatives in the presence of chiral dienes. The addition of both electron-poor as well as electron-rich boronic acids proceeds smoothly with various enals in 63-90% yield with high enantioselectivities (89-93% ee).
Asymmetric Synthesis of 3,3-Diarylpropanals with Chiral Diene−Rhodium Catalysts
作者:Jean-François Paquin、Christian Defieber、Corey R. J. Stephenson、Erick M. Carreira
DOI:10.1021/ja053270w
日期:2005.8.1
A general route to enantioenriched 3,3-diarylpropanals is presented. These useful building blocks are prepared via an asymmetric rhodium-catalyzed conjugate addition of arylboronic acids to cinnamaldehyde derivatives in the presence of chiral dienes. The addition of both electron-poor as well as electron-rich boronic acids proceeds smoothly with various enals in 63-90% yield with high enantioselectivities (89-93% ee).
Enantioselective Preparation of 1,1-Diarylethanes: Aldehydes as Removable Steering Groups for Asymmetric Synthesis
作者:Thomas C. Fessard、Stephen P. Andrews、Hajime Motoyoshi、Erick M. Carreira