Site-Selective Thiolation of (Multi)halogenated Heteroarenes
作者:Frederik Sandfort、Tobias Knecht、Tobias Pinkert、Constantin G. Daniliuc、Frank Glorius
DOI:10.1021/jacs.0c01630
日期:2020.4.15
complementing established methodologies such as nucleophilicaromaticsubstitution or palladium-catalyzed coupling reactions. Experimental and computational studies suggest a radical chain mechanism with the key step being a homolytic aromaticsubstitution of the heteroaryl halide by an electrophilic thiyl radical, highlighting an underdeveloped reactivity mode of these radicals.
Dual Transition Metal Electrocatalysis: Direct Decarboxylative Alkenylation of Aliphatic Carboxylic Acids
作者:Jiaqing Lu、Yan Yao、Liubo Li、Niankai Fu
DOI:10.1021/jacs.3c08839
日期:2023.12.13
the reaction. This new alkenylation protocol has been successfully demonstrated in direct modification of naturally occurring complex acids and is amenable to the enantioselective decarboxylative alkenylation of arylacetic acid. Mechanistic studies, including a series of controlled experiments and cyclic voltammetry data, allow us to probe the key intermediates and the pathway of the reaction.
A novel, inexpensive. thermophilic protease-type enzyme isolated from Clostridium thermohydrosulfuricum was used for dipeptide synthesis. The enzyme showed broad substrate selectivity and enantioselectivity towards L-amino acids in peptide bond formation. (C) 2001 Elsevier Science Ltd. All rights reserved.