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US 3,931,163 AGranted
Naphthoquinone derivatives
AssigneeSandoz Ltd., (Sandoz AG)
InventorBansi Lal Kaul
Life of this patent
Estimating the term…
Abstract
The present invention relates to naphthoquinone derivatives of formula I, ##SPC1## in which R.sub.1 signifies a halogen atom, a nitro group or an unsubstituted or substituted alkoxy or amino group, R.sub.2 signifies the atoms necessary to form an unsaturated ring system, which ring system has 1 or 2 nuclei and is unsubstituted or substituted, R.sub.3 signifies an unsubstituted or substituted s-triazinyl or pyrimidyl radical, and n is 0, 1 or 2, Which compounds are free from sulphonic acid groups are useful as pigments or disperse dyes.
Claims17
A compound of formula I, ##SPC15##
- wherein
- R.sub.1 signifies a chlorine atom;
- a bromine atom;
- a nitro group;
- an unsubstituted (C.sub.1-4) alkoxy group;
- a (C.sub.1-4) alkoxy group substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- or a group of the formula ##EQU18## in which each of R.sub.30 and R.sub.31, which may be the same or different, signifies a hydrogen atom;
- an unsubstituted (C.sub.1-4) alkyl group;
- a (C.sub.1-4) alkyl group substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- an unsubstituted phenyl radical;
- a phenyl radical substituted by up to three substituents selected from the group consisting of chloro, bromo, hydroxy and (C.sub.1-4) alkoxy;
- or a group of formula R--Y-- or R'--Z--,
- in which
- R signifies an unsubstituted (C.sub.1-4) alkyl group;
- a (C.sub.1-4) alkyl group substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- an unsubstituted phenyl radical;
- or a phenyl radical substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- Y signifies a radical of formula --O--CO-- or --SO.sub.2 --,
- R' signifies a hydrogen atom or has one of the significances of R, and
- Z signifies a radical of formula --CO--, --NR'CO-- or --NR'SO.sub.2 -- in which R' is as defined above,
- with the proviso that when one of R.sub.30 or R.sub.31 signifies an unsubstituted phenyl radical, a substituted phenyl radical or a group of the formula R--Y-- or R'--Z--, as defined above, the other signifies other than an unsubstituted phenyl radical, a substituted phenyl radical or a group of the formula R--Y-- or R'--Z--;
- R.sub.2 signifies a radical of formula P,
- --CH=CH--CH=CH-- P
- or a radical of formula Q, ##EQU19## which radicals are unsubstituted or are substituted by up to three substituents selected from the group consisting of chloro;
- bromo;
- unsubstituted (C.sub.1-4) alkyl or alkoxy;
- (C.sub.1-4) alkyl or alkoxy substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- phenoxy;
- nitro or a group of the formula R--Y--, R--Y--O--, R--Y--NH--, R'--Z--, R'--Z--O--, and R'--Z--NH-- in which R, R', Y and Z are as defined above,
- R.sub.3 signifies an unsubstituted s-triazinyl radical or an s-triazinyl radical substituted by up to two substituents selected from the group consisting of fluoro;
- chloro;
- bromo;
- unsubstituted (C.sub.1-4) alkyl or alkoxy;
- (C.sub.1-4) alkyl or alkoxy substituted by a chlorine atom, a bromine atom, a hydroxy group or a (C.sub.1-4) alkoxy group;
- hydroxy;
- phenoxy or a group of the formula ##EQU20## in which R.sub.30 and R.sub.31 are as defined above, and n is 0, 1 or 2,
- which compound is free from sulphonic acid groups.
34 more elements
Dependencies are inferred from the claim text.