An asymmetric synthesis of an axially chiral biaryl via an (arene)chromium complex: formal synthesis of (–)-steganone
作者:Motokazu Uemura、Akira Daimon、Yoshinori Hayashi
DOI:10.1039/c39950001943
日期:——
(–)-Steganone was formally synthesized by using the diastereoselective ortho-lithiation of a chiral acetal of tricarbonyl(3,4,5-trimethoxybenzaldehyde)chromium and subsequent cross-coupling of optically pure tricarbonyl(2-bromo-3,4,5-trimethoxybenzyl alcohol)chromium with arylboronic acid as key steps.
(–)-替加酮是通过使用三羰基(3,4,5-三甲氧基苯甲醛)铬的手性缩醛的非对映选择性邻位锂化和随后的光学纯三羰基(2-溴-3,4,5)的交叉偶联而正式合成的-三甲氧基苄醇)铬与芳基硼酸为关键步骤。