Asymmetric direct α-alkylation of 2-oxindoles with Michler's hydrol catalyzed by bis-cinchona alkaloid–Brønsted acid via an SN1-type pathway
作者:Tao Zhang、Zhen Qiao、Yan Wang、Nengjun Zhong、Li Liu、Dong Wang、Yong-Jun Chen
DOI:10.1039/c3cc39012h
日期:——
An enantioselective direct α-alkylation of 2-oxindoles with Michler's hydrol via an SN1-type pathway in the non-covalent activation mode using the bis-cinchona alkaloid and Brønsted acid as a co-catalyst was developed and good to high yields and enantioselectivities were obtained.
以双金鸡纳生物碱和 Br¸nsted 酸为助催化剂,在非共价活化模式下,通过 SN1 型途径开发了 2-oxindoles 与 Michler's hydrol 的直接δ-烷基化对映体选择性反应,并获得了很高的产率和对映体选择性。