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
Synthesis of novel chiral oxazoline-Schiff base ligands for the catalytic asymmetric chlorination of β-keto esters
作者:Ming-Hui Qi、Fei-Jun Wang、Min Shi
DOI:10.1016/j.tetasy.2010.02.003
日期:2010.2
A series of novel monooxazoline-Schiff baseligands 1 has been successfully synthesized. The Cu(I)–1a complex showed excellent catalytic activities with up to 83% ee for the asymmetric α-chlorination of β-ketoesters.
Amberlyst-15®-promoted efficient 2-halogenation of 1,3-keto-esters and cyclic ketones using N-halosuccinimides
作者:H.M. Meshram、P.N. Reddy、K. Sadashiv、J.S. Yadav
DOI:10.1016/j.tetlet.2004.11.140
日期:2005.1
A simple and rigid process has been developed for the alpha-monohalogenation of 1,3-keto-esters with N-halosuccinimides catalyzed by Amberlyst-15((R)) at room temperature to produce the corresponding 2-halo 1,3-keto-esters in high yields. This protocol also extended to alpha-halogenation of cyclic ketones. (C) 2004 Elsevier Ltd. All rights reserved.