Abstract
Abstract N-(α-Chlorobenzylidene)carbamoyl chloride (1) reacts with hydrazine hydrate to give 3-phenyl-1,2,4-triazolone (2), with sodium azide in the presence of water to give 5-phenyltetrazole (3), and with aliphatic nitriles in the presence of hydrogen chloride to give 6-chloro-2-phenyl-5-substituted-4(3H)-pyrimidones (5) and 4,6-dichloro-2-phenyl-5-substituted pyrimidines (6). However, the reaction of 1 with trichloroacetonitrile or pivalonitrile in the presence of hydrogen chloride did not give the expected triazines.
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