An efficient and mechanistically interesting method for the synthesis of highly substituted isoquinolines by a Rh(III)-catalyzed hydrazone directed ortho C H bond activation and annulation without an external oxidant is described. This reaction is accomplished via a C-C and C-N bond formation along with N-N bond cleavage.
Extension of the Willgerodt–Kindler reaction: protected carbonyl compounds as efficient substrates for this reaction
Nitrogen derivatives of carbonyl compounds such Lis oximes. hydrazones, and semicarbazones were found to be excellent candidates for the Willgerodt-Kindler reaction. They can be used directly in a solvent-free reaction, under both classical and inicrowave conditions. to give the corresponding thiomorpholides in good yields. (C) 2004 Elsevier Ltd. All rights reserved.
Efficient reductions of dimethylhydrazones using preformed primary amine boranes
作者:Christian Frabitore、Jérome Lépeule、Bradley Towey、Tom Livinghouse、William C. Robinson
DOI:10.1080/00397911.2021.2008449
日期:2022.1.17
Abstract A convenient method for the reduction of N,N-dimethylhydrazones using amine borane complexes generated in situ is described. It was found that primary amine borane complexes performed exceedingly well at reducing N,N-dimethylhydrazones in as little as 1.1 equivalents, furnishing the corresponding air-sensitive hydrazine products in excellent yields.
Catalytic Aerobic Oxidative Cleavage of Oximes, Tosylhydrazones and N,N-Dimethylhydrazones to Carbonyl Compounds
作者:Gonzalo Blay、Elisabeth Benach、Isabel Fernández、Sales Galletero、José R. Pedro、Rafael Ruiz
DOI:10.1055/s-2000-6347
日期:——
A new method for the aerobic oxidative cleavage of the C=N double bond of oximes and, tosyl- and N,N-dimethylhydrazones of ketones to yield their corresponding carbonyl compounds, with a Ni(II) complex catalyst, oxygen and pivalaldehyde has been developed.