A method using quinidine and optically active binol-derived phosphoric acid as a cocatalyst to catalyze the asymmetric semipinacol rearrangement of 2,3-allenols forming optically active 3-bromo-3-enals that contain an all-carbon quaternary stereocenter has been developed. After some further treatments, the products with practical enantiomeric purity could be prepared.
本研究开发了一种方法,利用
奎尼丁和光学活性双
酚衍生
磷酸作为协同催化剂,催化 2,3- 烯醇的不对称半
频哪醇重排反应,形成光学活性 3-溴-3-烯醛,其中含有一个全碳季基立体中心。经过进一步处理后,可以制备出具有实际对映体纯度的产品。