Solvent- and transition metal-free amide synthesis from phenyl esters and aryl amines
作者:Sergey A. Rzhevskiy、Alexandra A. Ageshina、Gleb A. Chesnokov、Pavel S. Gribanov、Maxim A. Topchiy、Mikhail S. Nechaev、Andrey F. Asachenko
DOI:10.1039/c8ra10040c
日期:——
A general, economical, and environmentally friendly method of amide synthesis from phenyl esters and arylamines was developed. This new method has significant advantages compared to previously reported palladium-catalyzed approaches. The reaction is performed transition metal- and solvent-free, using a cheap and environmentally benign base, NaH. This approach enabled us to obtain target amides in
开发了一种由苯酯和芳基胺合成酰胺的通用、经济和环保的方法。与先前报道的钯催化方法相比,这种新方法具有显着优势。该反应在无过渡金属和无溶剂的情况下使用廉价且对环境无害的碱 NaH 进行。这种方法使我们能够以高产率和高原子经济性获得目标酰胺。
Pd-Catalyzed Intermolecular <i>ortho</i>-C−H Amidation of Anilides by <i>N</i>-Nosyloxycarbamate
作者:Ka-Ho Ng、Albert S. C. Chan、Wing-Yiu Yu
DOI:10.1021/ja106364r
日期:2010.9.22
A palladium-catalyzed ortho-C-H amidation of anilides by N-nosyloxycarbamates was developed for the synthesis of 2-aminoanilines. This reaction can be carried out under relatively mildconditions and exhibits excellent regioselectivity and functional group tolerance. The amidation reaction is probably initiated by rate-limiting C-H cyclopalladation (k(H)/k(D) = 3.7) to form an arylpalladium complex
catalysed efficient, mild and metal-free method has been developed for direct amide bond synthesis from simple thioacids and amines as starting materials. This methodology is useful for aromatic, aliphatic, and heteroaromatic thioacids as well as primary, secondary, heterocyclic, and even functionalized amines. A wide substrates scope, operationally mild conditions, and acylation of amines without affecting
A novel Selectfluor-mediated copper-catalyzed highly selective benzylic C–O cyclization for the synthesis 4H-3,1-benzoxazines is reported. The predominant selectivity for a benzylic C(sp3)–H over an aromatic C(sp2)–H bond in N-o-tolylbenzamides is achieved.
报道了一种新颖的Selectfluor介导的铜催化的高选择性苄基C–O环化反应,用于合成4 H -3,1-苯并恶嗪。在N - o-甲苯基苯甲酰胺中,相对于芳族C(sp 2)-H键,苄基C(sp 3)-H具有主要的选择性。
3H-1,3,4-Benzotriazepines from (N-arylbenzimidoyl)-5-dimethylaminotetrazoles: 1,7-vs. 1,5-cyclisation of extended dipolar nitrile imines
作者:Gerhard V. Boyd、John Cobb、Peter F. Lindley、John C. Mitchell、George A. Nicolaou
DOI:10.1039/c39870000099
日期:——
Thermolysis of both 1- and 2-N-arylbenzimidoyl-5-dimethylaminotetrazoles [(7) or (8)] generates nitrileimines (9), which cyclise to yield either 1,2,4-triazoles (10) or 3H-1,3,4-benzotriazepines (12), depending on the nature of the N-aryl group and on conditions.