Trimethylchlorosilane-Mediated Mild α-Chlorination of 1,3-Dicarbonyl Compounds Promoted by Phenyliodonium Diacetate
作者:Yingpeng Su、Yulai Hu、Siying Chong、Lili Wu、Weigang Zhang、Junyan Ma、Xiaowei Chen、Danfeng Huang、Ke-Hu Wang
DOI:10.1055/s-0035-1561572
日期:——
Abstract Trimethylchlorosilane was used as chlorine source for the α-chlorination of 1,3-dicarbonyl compounds with phenyliodonium diacetate as oxidant at room temperature. The reaction allows the selective synthesis of α-monochlorinated products from different kinds of 1,3-dicarbonyl compounds in good yield. The potential possibility of this conversion for bromination has also been investigated. T
Chiral Amino Diol Derivatives as New Modular Organocatalysts for the Enantioselective α-Chlorination of Cyclic β-Keto Esters
作者:Pablo Etayo、Ramón Badorrey、María D. Díaz-de-Villegas、José A. Gálvez
DOI:10.1002/adsc.201000594
日期:2010.12.17
Highly modularchiralaminodiolderivatives have been used as organocatalysts in the enantioselectiveα-chlorination of cyclicβ-ketoesters. Optimization of the catalyst structure and the reaction conditions has allowed the synthesis of optically active α-chlorinated products with high enantioselectivities (up to 96% ee) using inexpensive commercially available N-chlorosuccinimide (NCS) as the chlorine
Sulfonium Salts Enable the Direct Sulfenylation of Activated C(
<i>sp</i>
<sup>
<i>3</i>
</sup>
)−H Bonds
作者:Liang Zhang、Sakkani Nagaraju、Banoth Paplal、Yunliang Lin、Shuhua Liu
DOI:10.1002/ejoc.202001569
日期:2021.3.5
The direct alkylsulfenylation of various activated C−H bonds has been reported. The reaction utilizes sulfonium salts as sulfenylation reagents which are readily prepared, operationally simple, and performe under mild reaction conditions.