The asymmetric synthesis of the 3-allyl-3-hydroxyoxindole skeleton was accomplished in yields up to 99% via a metal-free and enantioselective allylation of isatins (90–96% ee) using BINOL derivatives as catalysts and an optimized allylboronate. This methodology was applied at a gram-scale to the synthesis of the natural product (R)-chimonamidine.
Designed Iron Catalysts for Allylic C−H Functionalization of Propylene and Simple Olefins
作者:Ruihan Wang、Yidong Wang、Ruiqi Ding、Parker B. Staub、Christopher Z. Zhao、Peng Liu、Yi‐Ming Wang
DOI:10.1002/anie.202216309
日期:2023.3
complex was discovered to enable the coupling of the allylic carbon of propylene and carbonyl electrophiles. This approach was also successfully applied to allylic C−H functionalization of simple olefins. Experimental and computationalstudies provided insights into the mechanism and origins of ligand effects on reactivity and diastereoselectivity.
A Hg(ClO<sub>4</sub>)<sub>2</sub>·3H<sub>2</sub>O Catalyzed Sakurai–Hosomi Allylation of Isatins and Isatin Ketoimines Using Allyltrimethylsilane
作者:Zhong-Yan Cao、Yan Zhang、Cong-Bin Ji、Jian Zhou
DOI:10.1021/ol202705g
日期:2011.12.16
It is reported that Hg(ClO4)(2)center dot 3H(2)O could efficiently activate the cheap but less reactive allyltrimethylsilane for the allylation of isatins or isatin ketoimines, with catalyst loading down to 0.1 mol %. This is the first example of Sakurai-Hosomi allylation of ketoimines using allyltrimethylsilane. A rare example of chiral mercury catalysis is also reported.