Enantioselective Allylation, Crotylation, and Reverse Prenylation of Substituted Isatins: Iridium-Catalyzed CC Bond-Forming Transfer Hydrogenation
作者:Junji Itoh、Soo Bong Han、Michael J. Krische
DOI:10.1002/anie.200902328
日期:——
Oxindoles with a twist: Transfer hydrogenation of substituted isatins in the presence of allyl acetate, α‐methyl allyl acetate, or 1,1,‐dimethylallene using an cyclometalated iridium catalyst, provides products of carbonyl allylation, crotylation, and reverse prenylation, respectively, in highly enantiomerically enriched form. These studies represent the first use of activated ketones as electrophilic
具有扭曲的羟吲哚:在乙酸烯丙酯、乙酸α-甲基烯丙酯或1,1,-二甲基丙二烯存在下,使用环金属化铱催化剂对取代的靛红进行转移氢化,分别提供羰基烯丙基化、巴豆酰化和反异戊二烯化的产物,以高度对映体富集的形式。这些研究首次使用活化酮作为不对称 C - C 键形成转移氢化中的亲电伴侣。