Dearomatization of tryptophols via a vanadium-catalyzed asymmetric epoxidation and ring-opening cascade
作者:Long Han、Chuan Liu、Wei Zhang、Xiao-Xin Shi、Shu-Li You
DOI:10.1039/c3cc47921h
日期:——
An enantioselective epoxidation of tryptophols followed by an intramolecular epoxide opening reaction was realized by chiral vanadium catalysts derived from C2 symmetric bis-hydroxamic acid (BHA) ligands. 3a-Hydroxyfuroindoline derivatives with up to 89% yield and 90% ee were obtained under mild reaction conditions.
通过衍生自C2对称双异羟肟酸(BHA)配体的手性钒催化剂实现了对三酚的对映选择性环氧化,然后进行了分子内环氧化物开环反应。在温和的反应条件下获得了产率高达89%和ee达90%的3a-羟基呋喃二氢吲哚衍生物。