Breakthrough: A novel catalyzed direct highly selective CCsp bond functionalization of alkynes to amides has been developed. Nitrogenation is achieved by the highly selective CCsp bondcleavage of aryl‐substituted alkynes. The oxidant‐free and mild conditions and wide substrate scope make this method very practical.
Preparation of <i>N</i>-Aryl Amides by Epimerization-Free Umpolung Amide Synthesis
作者:Michael S. Crocker、Zihang Deng、Jeffrey N. Johnston
DOI:10.1021/jacs.2c05986
日期:2022.9.21
enantioselective synthesis. However, its inability to forge N-aryl amides has been a longstanding problem, one limiting its application more broadly in drug development where α-chiral N-aryl amides are increasingly common. We report here the reaction of α-fluoronitroalkanes and N-aryl hydroxyl amines for the direct synthesis of N-aryl amides using a simple Brønsted base as the promoter. No other activating
The Grignard Reaction in the Synthesis of Ketones. II. The Preparation of a Series of Mono- and Di-chlorodesoxybenzoins
作者:Sanford S. Jenkins、Edwin M. Richardson
DOI:10.1021/ja01331a049
日期:1933.4
Efficient Heterogeneous Gold(I)-Catalyzed Direct C(<i>sp</i>
<sup>2</sup>
)-C(<i>sp</i>
) Bond Functionalization of Arylalkynes through a Nitrogenation Process to Amides
作者:Quan Nie、Feiyan Yi、Bin Huang、Mingzhong Cai
DOI:10.1002/adsc.201700783
日期:2017.11.23
heterogeneous gold(I)-catalyzed direct C(sp2)–C(sp) bond functionalization of arylalkynes through a nitrogenation process to amides has been achieved by using an ordered mesoporous silica (MCM-41)-immobilized phosphine gold(I) complex [MCM-41-PPh3-AuCl] as catalyst and silver carbonate (Ag2CO3) as cocatalyst with trimethylsilyl azide (TMSN3) as a nitrogen source, yielding a variety of amides in moderate to
通过使用有序介孔二氧化硅(MCM-41)固定化的磷化膦金(I),实现了第一个非均相金(I)催化的芳族炔烃通过酰胺的氮化过程直接C(sp 2)–C(sp)键的官能化)络合物[MCM-41-PPh 3 -AuCl]作为催化剂,碳酸银(Ag 2 CO 3)作为助催化剂,叠氮化三甲基硅烷基酯(TMSN 3)作为氮源,在温和条件下可产生中等至优异收率的各种酰胺。这种异质的膦金(I)络合物显示出与均相的氯(三苯基膦)金(I)相同的营业额(Ph 3PAuCl)并可以通过简单过滤反应溶液而容易地回收,并循环至少八次而没有明显的活性损失,为从炔烃合成酰胺提供了一种新颖,有效,实用和经济的方法。