Benzofurane benzoxazoles
AssigneeBayer Aktiengesellschaft
InventorBernhard Wehling
Life of this patent
Estimating the term…
Abstract
Compounds of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 denote hydrogen, alkyl, alkoxy or halogen, A denotes aryl or a radical of the formula ##STR2## wherein R.sup.8 denotes aryl, alkyl, aralkyl, styryl or alkoxy, R.sup.9 denotes hydrogen, CN, COOR, CONRR' or R.sup.8 and X denotes N or C(R.sup.10), R.sup.4 and R.sup.10 denote hydrogen, alkyl or aryl, R.sup.5, R.sup.6 and R.sup.7 denote hydrogen, halogen or alkyl, inter alia, R denotes alkyl and R' denotes R or H, are valuable optical brighteners for polyesters, polyamides, cellulose esters and polyacrylonitrile.
Claims2
A benzofurane compound of the formula ##STR21## in which R.sup.1, R.sup.2 and R.sup.3 denote hydrogen, alkyl, alkoxy or halogen,
- R.sup.4 denotes hydrogen, aryl or alkyl,
- R.sup.5 denotes hydrogen, halogen, or alkyl,
- R.sup.6 denotes hydrogen, halogen, alkyl, alkoxy, alkylsulphonyl, phenylsulphonyl, CN, CF.sub.3, COOR, SO.sub.3 R, CONRR' or SO.sub.2 NRR',
- R.sup.7 denotes hydrogen, halogen, alkyl or alkoxy,
- R denotes alkyl and
- R' denotes alkyl or H,
- R.sup.8 denotes aryl, alkyl, aralkyl, styryl or alkoxy, and
- R.sup.9 denotes hydrogen, CN, COOR, CONRR' or R.sup.8, or R.sup.8 and R.sup.9 together denote a fused-on hydroaromatic or aromatic ring, and
- the abovementioned hydrocarbon radicals and alkoxy radicals and the optionally fused-on ring systems optionally being substituted by substituents customary in brightener chemistry.
Dependencies are inferred from the claim text.