SUBSTITUTED PYRAZOLIN-5-ONE

摘要

Pyrazolinones of formula (I) are new: R1 = H or alkyl; R2 = H, alkyl (opt. substd. by CN, OH, alkoxy, COOH, alkoxycarbonyl or CONH2, itself opt. substd. by 1 or 2 alkyl), alkenyl, alkynyl, or opt. substd. oxiranylalkyl, aralkyl or aryl; R3 = alkyl (opt. substd. by CN; OH, alkoxy, COOH or alkoxycarbonyl); alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl or (all opt. substd.) aralkyl, aryloxyalkyl or arylthioalkyl; R3 is Me or Et only if R1 and/or R2 are not H or Me.