Electrochemical oxidation of ketone acylhydrazones and their hydrogen cyanide adducts in sodium cyanide-methanol. Transformation of ketones to nitriles
Benzoylhydrazones in catalytic hydrophosphorylation
作者:E. D. Matveeva、T. A. Podrugina、I. N. Kolesnikova、N. S. Zefirov
DOI:10.1007/s11172-010-0094-3
日期:2010.2
Reactions of benzoylhydrazones derived from heterocyclic and aromatic aldehydes and aliphatic, heterocyclic, and aliphatic-aromatic ketones with diethyl phosphite in the presence of [tetra(tert-butyl)phthalocyanine]aluminumchloride afford α-benzoylhydrazino phosphonates in high yields.
Mild, Stereoselective, and Highly Efficient Synthesis of<i>N</i>-Acylhydrazones Mediated by CeCl<sub>3</sub>·7H<sub>2</sub>O in a Broad Range of Solvents
作者:José Maurício dos Santos Filho
DOI:10.1002/ejoc.201402609
日期:2014.10
This method uses a minimal catalytic amount of cerium(III), is stereoselective, and offers several unique features, such as compatibility with aryl, heterocyclic, alkenyl, and sensitive functional groups as well as the ability to prepare N-acylhydrazones from highly hindered substrates. More strikingly, cerium(III) efficiently mediated the reaction with less reactive substrates such as diaryl and alkyl
Phase-Transfer Catalyzed Addition of Hydrogen Cyanide to<i>N</i>-Substituted Hydrazones
作者:Toshiro Chiba、Mitsuhiro Okimoto
DOI:10.1055/s-1990-26831
日期:——
In a two-phase system consisting of aqueous sodium cyanide and an inert organic solvent and containing a phase-transfer catalyst, ketone benzoylhydrazones, tosylhydrazones, and methoxycarbonylhydrazones upon addition of acetic acid readily add hydrogen cyanide to give 2-substituted 1-(1-cyanoalkyl)hydrazines.
作者:W. Russell Bowman、Peter T. Stephenson、Nicholas K. Terrett、Adrian R. Young
DOI:10.1016/0040-4020(95)00412-2
日期:1995.7
Radical cyclisation of sp3 carbon-centred radicals onto imines and hydrazones provides a new method for the synthesis of 5- and 6-membered ring nitrogen heterocycles. Cyclisation onto the electrophilic carbon of the C=N group and 5-exo stereoelectronic selectivity are the dominating mechanistic parameters. The C-centred radical intermediates were generated from benzeneselenyl precursors using Bu3SnH
Photoredox Fluoroalkylation of Hydrazones in Neutral and Reductive Modes
作者:Boris A. Worp、Mikhail D. Kosobokov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1002/adsc.202001381
日期:2021.2.16
Visible light promoted fluoroalkylation of hydrazones using 4‐perfluoropyridine sulfides as fluoroalkyl radical sources is described. The process can proceed in neutral and reductive modes delivering either hydrazones or hydrazines, respectively, depending on structure of starting substrates and reaction conditions. For the reductive process, ascorbic acid is used as a terminal reductant, which recycles