2(1h)-quinazolinone derivs - by reaction of cyano-carbonylaminoben zophenone derivs and ammonia, as anti-inflammatory and analgesic agen

摘要

Cpds. of formula (I):- (where R1, R2 and R3 = H, halogen, lower alkyl, lower alkoxy, NO2, CF2, lower alkylthio or lower alkylsulphonyl; R = lower alkyl, lower alkenyl, aryl-lower-alkyl, cycloalkyl-lower-alkyl, lower alkoxy-lower alkyl, lower alkylthio-lower alkyl or polyhalo-lower-alkyl); are prepd. by reacting a cpd. (II) with NH3. 1-Methyl-4-phenyl-6-nitro-2(1H)-quinazolinone is typical of (I).