CH Alkenylations with Alkenyl Acetates, Phosphates, Carbonates, and Carbamates by Cobalt Catalysis at 23 °C
作者:Marc Moselage、Nicolas Sauermann、Sven C. Richter、Lutz Ackermann
DOI:10.1002/anie.201412319
日期:2015.5.18
N‐heterocyclic carbene ligands enable direct arene alkenylations with easily accessible alkenyl acetates through regioselective CH/CO functionalizations in a stereoconvergent fashion. The versatile cobalt catalyst was broadly applicable and thus also allowed for the efficient conversion of alkenyl phosphates, carbonates, and carbamates at ambient temperature.
便宜的钴催化剂与N-杂环碳烯配体能够通过区域选择性下用容易获得的烯基乙酸酯直接芳烃alkenylations H / C Ò官能化以stereoconvergent方式。通用的钴催化剂具有广泛的用途,因此也可以在环境温度下有效地转化烯基磷酸盐,碳酸盐和氨基甲酸酯。
Electrochemical Radical Reactions of Enol Acetates and Free Alcohols Directly Access to α-Alkoxylated Carbonyl Compounds
作者:Fan Wu、Yu Guo、Zihao Ren、Zixuan Chen、Xiaoqin Liu、Chang Wang、Liangce Rong
DOI:10.1021/acs.joc.3c00635
日期:2023.7.7
The efficient intermolecular alkoxylation reactions of various enolacetates and different alcohols are developed in the electrochemical process for the first time. Enolacetatesderivedfrom either aromatic, alkyl, or alicyclic ketones, and abundant free alcohols directly used in this synthetic strategy, make this transformation very valuable in synthesis and application in the future.
Carbomethoxydifluoromethylation of enol acetates with methyl (chlorosulfonyl)difluoroacetate using visible-light photoredox catalysis. Synthesis of 2,2-difluoro-γ-ketoesters
作者:Charles S. Thomoson、William R. Dolbier
DOI:10.1016/j.jfluchem.2015.07.018
日期:2015.10
In a visible light, room temperature photoredox catalytic process using 0.5 mol% of a Ir[(dF(CF3)p-py)(2)(dtbbpy)]PF6 catalyst, a general method for attaching a carbomethoxydifluoromethyl group to the alpha position of a ketone, using the reaction of methyl (chlorosulfonyl)difluoroacetate (MCDA) with enol acetates, is reported. This method allows the synthesis of a variety of 2,2-difluoro-gamma-ketoesters in moderate to very good yields. (C) 2015 Elsevier B.V. All rights reserved.