Back to results
US 4,455,424 AGranted
Triazinyl compounds as intermediates for producing naphthoquinone derivatives
AssigneeSandoz Ltd.
InventorBansi L. Kaul
Life of this patent
Estimating the term…
Abstract
The present invention relates to naphthoquinone derivatives of formula I, ##STR1## 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.
Claims8
A compound of formula III',
- R.sub.4 "--CO--CH.sub.2 --A III'
- wherein
- R.sub.4 " is unsubstituted C.sub.1-4 alkyl;
- monosubstituted C.sub.1-4 alkyl, wherein the substituent is selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- unsubstituted C.sub.1-4 alkoxy;
- unsubstituted phenoxy;
- unsubstituted phenyl;
- phenyl substituted by 1 to 3 substituents independently selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- or a group of formula ##STR32## wherein each of R.sub.30 and R.sub.31, independently, is hydrogen;
- unsubstituted C.sub.1-4 alkyl;
- monosubstituted C.sub.1-4 alkyl, wherein the substituent is selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- unsubstituted phenyl;
- phenyl substituted by 1 to 3 substituents independently selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- a group of formula
- R--Y--
- wherein R is unsubstituted C.sub.1-4 alkyl;
- monosubstituted C.sub.1-4 alkyl, wherein the substituent is selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- unsubstituted phenyl;
- or monosubstituted phenyl, wherein the substituent is selected from chloro, bromo, hydroxy and C.sub.1-4 alkoxy;
- and Y is --O--CO-- or --SO.sub.2 --;
- or a group of formula
- R'--Z--
- wherein R' is hydrogen or one of the significances of R;
- and Z is --CO--, --NR'CO-- or --NR'SO.sub.2 --, wherein R' is as defined above, with the proviso that when one of R.sub.30 and R.sub.31 is unsubstituted phenyl, substituted phenyl, a group R--Y-- or a group R'--Z-- as defined above, the other has a significance other than unsubstituted phenyl, substituted phenyl, a group R--Y-- or a group R'--Z--;
- and
- A is a radical of formula (a) or (b), ##STR33## wherein each of R.sub.5 and R.sub.6, independently, is hydrogen;
- fluoro;
- chloro;
- bromo;
- hydroxy;
- C.sub.1-4 alkyl;
- C.sub.1-4 alkoxy;
- unsubstituted phenoxy;
- or a group of formula ##STR34## wherein R.sub.30 and R.sub.31 are as defined above;
- and each of R.sub.12 and R.sub.13, independently, is hydrogen;
- C.sub.1-4 alkoxy;
- unsubstituted phenoxy;
- or a group of formula ##STR35## wherein R.sub.30 and R.sub.31 are as defined above;
- with the provisos that:
- (i) when A is a radical of formula (a), R.sub.4 " is unsubstituted C.sub.1-4 alkyl, monosubstituted C.sub.1-4 alkyl as defined above, unsubstituted phenyl;
- phenyl substituted as defined above, or a group of formula ##STR36## wherein R.sub.30 and R.sub.31 are as defined above;
- and (ii) when A is a radical of formula (b), R.sub.4 " is C.sub.1-4 alkoxy or unsubstituted phenoxy.
39 more elements
Dependencies are inferred from the claim text.