A formal [4 + 1] annulation of readily available α-arylhydrazonoketones and trimethylsulfoxonium iodide in the presence of cesium carbonate is described involving a sequential Corey–Chaykovsky reaction and intramolecular nucleophilic cyclization process. Substituted pyrazoles were obtained exclusively from the reactions of α-arylhydrazono-β-oxo-amides and trimethylsulfoxonium iodide in moderate to
Kinetics and mechanism of gas-phase pyrolysis ofN-aryl-3-oxobutanamide ketoanilides, their 2-arylhydrazono derivatives, and related compounds
作者:Rana N. Malhas、Nouria A. Al-Awadi、Osman M. E. El-Dusouqui
DOI:10.1002/kin.20220
日期:2007.2
Rates and products of reaction and Arrhenius activation parameters were determined for the gas-phase thermolysis of 14 substrates of the title compounds using sealed pyrex reactor tubes and HPLC/UV-VIS to monitor substrate pyrolysis. The 14 compounds under study are N-phenyl-3-oxo- (1), N-(p-chlorophenyl)-3-oxo- (2), N-(p-methylphenyl)-3-oxo- (3), and N-(p-methoxyphenyl)-3-oxobutanamide (4), in addition