Palladium-Catalyzed Asymmetric Desymmetrization for the Simultaneous Construction of Chiral Phosphorus and Quaternary Carbon Stereocenters
作者:Hengrui Zhou、Yiji Xue、Xiang Zhou、Hequan Yao、Aijun Lin
DOI:10.1021/acs.orglett.4c01863
日期:2024.7.19
A palladium-catalyzedasymmetric tandem Heck and carbonylation of bisallyl-phosphine oxides has been developed. This desymmetrization process provided an efficient route to the simultaneous synthesis of a chiral P-stereogenic center and a chiral quaternary carbon stereocenter in good yields with good diastereo- and enantioselectivities.
Arynes are generated cleanly and rapidly by halogen-lithium exchange of ortho-haloaryl triflates with n-BuLi at -78-degrees-C. [2+4]-Cycloaddition of alpha-alkoxyaryne with 2-methoxyfuran proceeded regioselectively (head-to-head) to afford 1,4,5-naphthalenetriols.