Reduction of Ag(I) by 1-acyl-2-arylhydrazines: Mechanism of photographic infectious development
作者:W. Russell Bowman、J. Anthony Forshaw、Kevin P. Hall、Jonathan P. Kitchin、Andrew W. Mott
DOI:10.1016/s0040-4020(96)00050-6
日期:1996.3
The photographic process of ‘infectious development’ in which 1-acyl-2-arylhydrazines reduce Ag(I) has been studied using analogues. 1-Acyl-2-aryldiazenes, resulting from oxidation of 1-acyl-2-arylhydrazines, are hydrolysed to anions of aryldiazenes (ArN=NH), which undergo further oxidation with loss of nitrogen to yield aryl radicals. The aryl radicals cause ‘feedback inhibition’ which is prevented
Visible-Light-Mediated Hydroacylation of Azobenzenes with α-Keto Acids
作者:Jingya Yang、Menghui Song、Hongyan Zhou、Ganggang Wang、Ben Ma、Yuanyuan Qi、Congde Huo
DOI:10.1021/acs.orglett.0c03039
日期:2020.11.6
A visible-light-mediated protocol for the hydroacylation of azobenzenes with α-keto acids has been developed. In the absence of any catalyst or additive, decarboxylative hydroacylation proceeded smoothly under visible-light irradiation at room temperature. A wide range of azobenzenes and α-keto acids were well-tolerated and afforded hydroacylation products in high to excellent yields. Preliminary investigations
Photoredox-Catalyzed Hydroacylation of Azobenzenes with Carboxylic Acids
作者:Qiao Li、Jianhui Chen、Yanshu Luo、Yuanzhi Xia
DOI:10.1021/acs.orglett.4c00238
日期:2024.2.23
Acyl hydrazides are widely found in bioactive compounds and have important applications as versatile synthetic intermediates. In the current report, a photoredox-catalyzed hydroacylation of azobenzenes was disclosed with carboxylic acids as the acylation reagent, affording a variety of N,N′-disubstituted hydrazides. The process possesses the advantages of mild reaction conditions, broad substrate scope
Neue Carbonsäurehydrazide, Verfahren zu ihrer Herstellung, ihre Verwendung und sie enthaltende pharmazeutische Zusammensetzungen
申请人:CIBA-GEIGY AG
公开号:EP0019587A1
公开(公告)日:1980-11-26
Neuen Carbonsäurehydrazide der Formel
worin R eine gegebenenfalls veresterte Carboxygruppe bedeutet, und Salze der Verbindung der Formel I, worin R Carboxy ist, besitzen antithrombotische Eigenschaften und können als Arzneimittelwirkstoffe in pharmazeutischen Präparaten verwendet werden. Sie werden z.B. hergestellt, indem man 1,3-diphenyl-4 -(phenylthioäthyl-pyrazolidin-3, 5-dion hydrolysiert oder einen 2-(2-Phenylthioäthyl)- malonsäuremonoester mit Hydrazobenol kondensiert.
新的羧酸酰肼式
其中 R 为任选酯化的羧基,以及式 I 化合物的盐类(其中 R 为羧基)具有抗血栓特性,可用作药物制剂中的活性药物成分。例如,可通过水解 1,3-二苯基-4-(苯硫基乙基吡唑烷-3,5-二酮)或将 2-(2-苯硫基乙基)丙二酸单酯与肼基苯酚缩合来制备它们。
Amino acid-mediated Goldberg reactions between amides and aryl iodides
A highly general, experimentally simple, and inexpensive catalyst system was developed for the amidation of aryl iodides by using 5 mol% of CuI as catalyst, 20 mol% of an amino acid as ligand, and K3PO4 as base. (C) 2004 Elsevier Ltd. All rights reserved.