“…1,3-disubstituted 5chloropyrazoles [11] were synthesized from 2,2-dichlorovinyl alkyl ketones and alkyl-or 1,1-dialkyl hydrazines, the reaction of 1alkyl(aryl)-3,4-bis(dimethylamino)but-2-en-1ones with hydrazine hydrate led to the preparation of 3-alkyl(aryl)-5-(dimethylaminomethyl) pyrazoles [12][13], etc.…”