single‐step synthesis of aryl thiols from arylhalides has been developed employing copper(II) catalyst and 1,2‐ethanedithiol. The key features are use of readily available reagents, a simple operation, and relatively mild reaction conditions. This new protocol shows a broad substrate scope with excellent functional group compatibility. A variety of aryl thiols are directly prepared from arylhalides in high
Iron-Catalyzed Cross-Coupling of Unactivated Secondary Alkyl Thio Ethers and Sulfones with Aryl Grignard Reagents
作者:Scott E. Denmark、Alexander J. Cresswell
DOI:10.1021/jo402246h
日期:2013.12.20
ed cross-coupling are described. Initial studies focused on discerning the structural and electronic features of the organosulfur substrate that enable the challenging oxidative addition to the C(sp3)–S bond. Through extensive optimization efforts, an Fe(acac)3-catalyzed cross-coupling of unactivated alkyl aryl thio ethers with aryl Grignardreagents was realized in which a nitrogen “directing group”
Metal-free oxidative coupling of alkyl chlorides with thiols: An efficient access to sulfoxides
作者:Qian Liu、Xiaoqian Zhao、Feng Xu、Gaoqiang Li
DOI:10.1016/j.tetlet.2019.151492
日期:2020.2
An efficient and step-economical access to sulfoxides from thiols and alkyl halides in the presence of I2O5 and DBU via direct oxidative couplings is described here. It is the first case that combined Williamson sulfide synthesis and subsequent sulfide oxidation into one step manipulation for sulfoxides preparation. This protocol features wide substrate scope, mild and metal-free conditons, the use
本文描述了在I 2 O 5和DBU存在下,通过直接氧化偶合从硫醇和烷基卤化物高效,经济地获取亚砜的方法。这是第一种将威廉姆森硫化物合成和随后的硫化物氧化结合起来一步一步进行亚砜制备的情况。该协议具有广泛的底物范围,温和无金属的条件,使用天然丰富的起始原料以及避免过度氧化的特点。
Design of thymidylate synthase inhibitors using protein crystal structures: the synthesis and biological evaluation of a novel class of 5-substituted quinazolinones
作者:Stephen E. Webber、Ted M. Bleckman、John Attard、Judith G. Deal、Vinit Kathardekar、Katherine M. Welsh、Stephanie Webber、Cheryl A. Janson、David A. Matthews
DOI:10.1021/jm00058a010
日期:1993.3
The design, synthesis, and biological evaluation of a new class of inhibitors of thymidylate synthase (TS) is described. The molecular design was carried out by a repetitive crystallographic analysis of protein-ligand structures. At the onset of this project, we focused on the folate cofactor binding site of a high-resolution ternary crystal complex of Escherichia coli TS, 5'-fluorodeoxyuridylate (5-FdUMP)