Enantioselective Cross-Coupling for Axially Chiral Tetra-ortho-Substituted Biaryls and Asymmetric Synthesis of Gossypol
作者:He Yang、Jiawei Sun、Wei Gu、Wenjun Tang
DOI:10.1021/jacs.0c02686
日期:2020.4.29
Axiallychiral tetra-ortho-substituted biaryl skeleton exists in numerous biologically important natural products, pharmaceutical molecules, chiral catalysts and ligands. The efficient synthesis of chiral tetra-ortho-substituted biaryl structures remains a challenging but unsolved problem. Among various asymmetric synthetic protocols, enantioselective Suzuki-Miyaura cross-coupling represents one of
As an important intermediate in the synthesis of Ib, several ways of preparing the dialdehyde (IX) were investigated and a considerable increase in total yield was achieved. Synthesis of XXXI, an intermediate in the synthesis of IIb, was also examined.