Abstract
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 α-chlorobenzylhydrazines and hydrazonoyl chlorides, nitrile imines, or hydrazonoylpyridinium salts as intermediates are considered, α-Chlorobenzylhydrazines and hydrazonoyl chlorides are shown to be the most probable intermediates.
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