A Practically Unified Electrochemical Strategy for Ni-Catalyzed Decarboxylative Cross-Coupling of Aryl Trimethylammonium Salts
作者:Xianqiang Kong、Yiyi Chen、Xiaohui Chen、Zheng-Xuan Lu、Wei Wang、Shao-Fei Ni、Zhong-Yan Cao
DOI:10.1021/acs.orglett.2c00408
日期:2022.3.25
merging electrocatalysis and nickel catalysis, a unified strategy has been successfully applied to achieve the decarboxylative cross-coupling of four types of α-oxocarboxylic acids and their derivatives with aryl trimethylammonium salts under mild conditions. Our strategy provides a practical way for preparing aryl ketones, amides, esters, or aldehydes.
deuterated architectures for various scientific applications. Traditionally, these deterium-labeled (hetero)aryl bromides are commonly prepared via multistep syntheses. Herein, we disclose a direct H/D exchange protocol for deuteration of (hetero)aryl bromides using Ag2CO3 as catalyst and D2O as deuterium source. This protocol is highly efficient, simply manipulated, and appliable for deuterium-labeling
氘标记的(杂)芳基溴是最广泛应用的基序之一,可实现重要的氘代体系结构以用于各种科学应用。传统上,这些氘标记的(杂)芳基溴化物通常是通过多步合成法制备的。在这里,我们公开了一种直接的H / D交换协议,用于使用Ag 2 CO 3作为催化剂和D 2对(杂)芳基溴进行氘化O作为氘源。该协议高效,简单易操作,适用于55种以上(杂)芳基溴的氘标记,包括生物活性药物样分子和功能材料的关键中间体。另外,该方法显示出与现有过渡金属催化的HIE过程截然不同的位点选择性,从而一步完成了多氘代(杂)芳基溴化物。
Preparation and structure of triorganotin and triorganolead methyloxalates
作者:A. Glowacki、F. Huber、H. Preut
DOI:10.1016/s0022-328x(00)98928-9
日期:1986.5
Triorganotin and triorganolead methyloxalates R3MO2CCO2Me (M = Sn, Pb; R = Me, Ph) have been prepared by neutralization of HO2CCO2Me with the appropriate hydroxides. The crystal structure of Ph3PbO2CCO2Me has been determined by single crystal X-ray diffraction. In the chain-like structure the lead atom is in a slightly distorted trigonal bipyramidal environmental, with C(phenyl) in the equatorial plane
Photoredox-Catalyzed Allylic Defluorinative Alkoxycarbonylation of Trifluoromethyl Alkenes through Intermolecular Alkoxycarbonyl Radical Addition
作者:Jia-Xin Wang、Wei Ge、Ming-Chen Fu、Yao Fu
DOI:10.1021/acs.orglett.1c04359
日期:2022.2.25
medicinal chemistry, but efficient synthesis of β-gem-difluoroalkene esters remains challenging so far. Herein, we disclose a photoredox-catalyzed allylic defluorinative alkoxycarbonylation of trifluoromethyl alkenes enabled by intermolecular alkoxycarbonyl radical addition. A wide variety of alcohol oxalate derivatives were amenable, affording various β-gem-difluoroalkene esters with excellent functional