Phosphine-Catalyzed Enantioselective γ-Addition of 3-Substituted Oxindoles to 2,3-Butadienoates and 2-Butynoates: Use of Prochiral Nucleophiles
作者:Tianli Wang、Weijun Yao、Fangrui Zhong、Guo Hao Pang、Yixin Lu
DOI:10.1002/anie.201307757
日期:2014.3.10
first phosphine‐catalyzed enantioselective γ‐addition with prochiral nucleophiles and 2,3‐butadienoates as the reaction partners has been developed. Both 3‐alkyl‐ and 3‐aryl‐substituted oxindoles could be employed in this process, which is catalyzed by a chiral phosphine that is derived from an amino acid, thus affording oxindoles that bear an all‐carbon quaternary center at the 3‐position in high yields
已经开发出了第一种膦催化的以手性亲核试剂和2,3-丁二烯酸酯为反应伙伴的对映体选择性γ-加成物。在这个过程中,可以同时使用3个烷基和3个芳基取代的吲哚,这是由衍生自氨基酸的手性膦催化的,因此提供了在3位带有全碳四元中心的羟吲哚。具有高收率和出色的对映选择性。这些γ加成产物的合成价值通过两种天然产物的正式全合成以及生物学相关分子和结构支架的制备得到证明。