Patent ID: 6320081
Filing Date: 2001-11-20
Classification: C07C

Abstract:
An o-nitrophenol or o-nitrothiophenol derivative of the structure ##STR20##in which:each of A.sup.1 to A.sup.3 is a ring substituent independently selected from H, F, CH.sub.3, CH.sub.2 CH.sub.3, CF.sub.3, CF.sub.2 CF.sub.3, OCH.sub.3, OCF.sub.3, OCH.sub.2 CH.sub.3 or OCF.sub.2 CF.sub.3 ;each T=O only or each T=S only;R=alkyl, alkoxyalkyl, alkenyl, alkoxyalkenyl, alkynyl or alkoxyalkynyl, each having a maximum of 6 carbon atoms, phenyl, C.sub.6 H.sub.5 COCH.sub.2 or benzyl, and benzylalkyl, benzylalkenyl, benzyloxyalkyl, benzyloxyalkenyl, benzylalkoxyalkyl or benzylalkoxyalkenyl, each having a maximum of four aliphatic carbon atoms;R*=H or R;provided that, in the o-nitrophenol derivative (1), when R is allyl or benzyl the TH group is in the m-position to the TR group and provided that in the o-nitrophenol derivative (1) R is not alkyl; and provided further that on each ring in the o-nitrophenol derivative (2) not more than one of the ring substituents A.sup.1 to A.sup.3 can be OCH.sub.3.