Atroposelective Synthesis of Axially Chiral Biaryls by Palladium-Catalyzed Asymmetric C−H Olefination Enabled by a Transient Chiral Auxiliary
作者:Qi-Jun Yao、Shuo Zhang、Bei-Bei Zhan、Bing-Feng Shi
DOI:10.1002/anie.201701849
日期:2017.6.1
Atroposelective synthesis of axially chiral biaryls by palladium-catalyzed C−H olefination, using tert-leucine as an inexpensive, catalytic, and transient chiralauxiliary, has been realized. This strategy provides a highly efficient and straightforward access to a broad range of enantioenriched biaryls in good yields (up to 98 %) with excellent enantioselectivities (95 to >99 % ee). Kinetic resolution
Palladium-catalyzed ortho-C-H silylation of biaryl aldehydes using a transient directing group
作者:Yong-Jie Wu、Qi-Jun Yao、Hao-Ming Chen、Gang Liao、Bing-Feng Shi
DOI:10.1007/s11426-020-9694-3
日期:2020.7
useful building blocks. Notably, this protocol also offers an opportunity to establish a platform for expeditious synthesis of structurally diverse axially chiral biaryl aldehydes via sequential atroposelective interannular C-H functionalization/intraanular C-H silylation.