α-C—H Alkylation of Methyl Sulfides with Alkenes by a Scandium Catalyst
作者:Yong Luo、Yuanhong Ma、Zhaomin Hou
DOI:10.1021/jacs.7b11245
日期:2018.1.10
addition of sulfides to alkenes is an atom-efficient route for the functionalization and modification of sulfide compounds through C-C bond formation, but this transformation is highly challenging. We report here the regioselective α-C(sp3)-H addition of a wide range of methyl sulfides to a variety of olefins and dienes by a half-sandwich scandium catalyst. This protocol provides a unique route for the synthesis
硫化物与烯烃的 CH 加成是通过形成 CC 键对硫化物化合物进行官能化和改性的一种原子有效途径,但这种转化极具挑战性。我们在这里报告了通过半夹心钪催化剂将多种甲基硫化物区域选择性地加成到各种烯烃和二烯中的 α-C(sp3)-H。该协议为通过在硫相邻碳原子上以 100% 原子效率的方式形成 CC 键来合成多种硫化物衍生物提供了独特的途径。
Dual role of allylsamarium bromide as a Grignard reagent and a single electron transfer reagent in the one-pot synthesis of terminal olefins
作者:Ying Li、Yuan-Yuan Hu、Song-Lin Zhang
DOI:10.1039/c3cc45611k
日期:——
The utility of allylsamarium bromide, both as a nucleophilic reagent and a single-electron transfer reagent, in the reaction of carbonyl compounds with allylsamarium bromide in the presence of diethyl phosphate is reported in this communication. From a synthetic point of view, a simple one-pot method for the preparation of terminal olefins is developed.
Radical Addition-Triggered Remote Migratory Isomerization of Unactivated Alkenes to Difluoromethylene-Containing Alkenes Enabled by Bimetallic Catalysis
A fascinating alkeneremote migratory isomerization engendered by carbon radical addition to C═C bond in alkenes via bimetalliccatalysis has been disclosed. A diverse array of alkenes bearing distantly incorporated the difluoromethylene (RCF2R′) functionality have been expediently obtained. The retainment of C═C bonds in products could serve as an useful synthetic platform furnishing otherwise difficult