Reaction of phenylcarbene formed from benzaldehyde tosylhydrazone in certain solvents
作者:H. Nozaki、R. Noyori、K. Sisido
DOI:10.1016/s0040-4020(01)98979-3
日期:1964.1
tosylhydrazone (I) with sodium methoxide in various solvents under irradiation and/or heating yields products arising fromphenylcarbene (IV) which is produced by photolytic or pyrolytic decomposition of initially formed phenyldiazomethane (III). Reaction products originating solely from the tosylhydrazone (I) are (VI ∼ XI) while those produced by the interaction with solvents are formulated as addition
aryltrichloromethanes. Further transformations of the oximes in the reaction course can result in the formation of nitriles or 3,5-diaryl-1,2,4-oxadiazoles as final products. The conversion depth depends on reaction conditions and structures of trichloromethyl-arenes. When hydrazines used instead of hydroxylamine, respectivebenzaldehyde hydrazones or azines are obtained.
作者:Kantlehner, Willi、Haug, Erwin、Scherr, Oliver、Stoyanov, Edmont V.、Mezger, Jochen、Ziegler, Georg
DOI:——
日期:——
An alternative channel of reductive condensation of trichloromethylarenes with hydrazines
作者:L. I. Belen'kii、S. I. Luiksaar、N. D. Chuvylkin、M. M. Krayushkin
DOI:10.1007/bf02494714
日期:2000.5
The reductive condensation of trichloromethylarenes with hydrazines can proceed without intermediate formation of pyridinium salts and without participation of pyridine in the reduction act. Variants of reductive condensation using hydrazines as reducting agents and alpha-chlorobenzylhydrazines and hydrazonoyl chlorides, nitrile imines, or hydrazonoylpyridinium salts as intermediates are considered, alpha-Chlorobenzylhydmzines and hydrazonoyl chlorides are shown to be the most probable intermediates.
PREPARATION OF 2,4,6-TRIMETHYLBENZALDAZINE; OF 2,4,6-TRIMETHYLBENZYL-2,4,6-TRIMETHYLBENZAL HYDRAZONE AND SOME OF ITS DERIVATIVES.