New 2-amino-thiophene cpds. and derived disperse azo dyes

摘要

Thienyl cpds. of formula (I) are new. In (I) R = halo; R1 = Cn, 1-6C alkoxycarbonyl, 3-6C alkenyloxycarbonyl, CONH2 (opt. substd. by 1 or 2 1-4C alkyl), 1-4C alkylsulphonyl, PhSO2, 1-4C alkylcarbonyl, PhCO or CONHPh; R2 = HCO, CN, -CH=C(R4)2 or -CH=N-OH; R3 = -N=N-K or NH2; K = residue of a coupler; each R4 = CN, 1-6C alkoxycarbonyl or 3-6C (alkenyl or alkynyl)oxycarbonyl; or one is CN and the other benzoyl, opt. substd. by one 1-4C alkoxycarbonyl, 1-4C alkylsulphonyl, PhSO2 or CONH2 (opt. substd. by 1-4C alkyl or phenyl); or one is H and the other is benzoyl (opt. substd. by one 1-2C alkoxycarbonyl, halo, 1-4C alkyl or NO2), 1-4C alkylcarbonyl or 3-6C alkenylcarbonyl; or one is NO2 and the other H, Me or Et.