Palladium-Catalyzed Carbonylative Cross-Coupling of Difluoroalkyl Halides with Alkylboranes under 1 atm of CO
作者:Hai-Yang Zhao、Minqi Zhou、Xingang Zhang
DOI:10.1021/acs.orglett.1c03396
日期:2021.12.3
A palladium catalyzed carbonylative cross-coupling of difluoroalkyl halides with alkyl-9-BBN under 1 atm of CO has been developed. The reaction shows broad substrate scope and high functional group tolerance, even toward complex pharmaceuticals, providing a general and straightforward method to access alkyldifluoroalkyl ketones. Preliminary mechanistic studies reveal that a radical pathway is involved
已开发出钯催化的二氟烷基卤化物与烷基-9-BBN 在 1 个大气压的 CO 下的羰基化交叉偶联。该反应显示出广泛的底物范围和高官能团耐受性,甚至对复杂的药物也是如此,为获取烷基二氟烷基酮提供了一种通用且直接的方法。初步的机理研究表明,该反应涉及自由基途径。
Carbonylation of Difluoroalkyl Bromides Catalyzed by Palladium
Although important progress has been made in the fluoroalkylation reactions, the transition‐metal‐catalyzed carbonylative fluoroalkylation reaction remains challenging so far. Herein, we report the first example of a Pd‐catalyzedcarbonylation of difluoroalkyl bromides with (hetero)arylboronic acids under one atmosphere pressure of CO. The reaction can also be extended to the aryl potassium trifluoroborate
Copper(I)-Catalyzed Oxydifluoroalkylation of Alkenes: A Route to Functionalization of Lactones
作者:Yang Da、Shengnan Han、Xiaoyong Du、Shaodong Liu、Lei Liu、Jie Li
DOI:10.1021/acs.orglett.8b02069
日期:2018.9.7
An efficient copper(I)-catalyzed oxydifluoroalkylation of unsaturated carboxylic acids has been developed under mild reaction conditions. Various α-bromodifluoromethyl substituted heterocycles, esters, amides, and ketones were successfully employed as the CF2 source. This cost-effective copper(I) catalysis provides expedient access to high valued lactones with ample substrate scope, wide functional
A simple and highly efficient Cu-mediated gem-difluoromethylenation of a variety of aryl boronic acids with bromodifluoromethylated heterocyclic compounds has been disclosed. The transformations were performed in air at room temperature without ligands, bases, or additives.