Phenyl-benzimidazolyl-furanes

Details Phenyl-benzimidazolyl-furanes Phenyl-benzimidazolyl-furanes

1978-02-10

1980-02-19

Raymond, Richard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

25230125, 25230126, 25230127, 544116, 544119, 544370, 546199, C07D40504

Patent

active

041895894

ABSTRACT:
2-Phenyl-5-benzimidazol-2'-yl-furanes of the formula ##STR1## in which R.sub.1 is a sulphonic acid group or an ester or amide thereof, a carboxylic acid group or an ester or amide thereof, a cyano group, a trifluoromethyl group or an alkyl- or arylsulphonyl group, R.sub.2 is alkyl having 1 to 8 carbon atoms, alkenyl having 3 or 4 carbon atoms, cyclohexyl, hydroxyalkyl having 2 to 4 carbon atoms, alkoxyalkyl having a total of 3 to 6 carbon atoms, carboxyalkyl having 2 to 6 carbon atoms, carbalkoxyalkyl having a total of 3 to 6 carbon atoms, cyanoalkyl having 2 to 4 carbon atoms, carbamoylalkyl which has 1 to 6 carbon atoms in the alkyl moiety and is unsubstituted or substituted on the nitrogen atom by 1 or 2 alkyl having 1 to 3 carbon atoms, benzyl which is unsubstituted or substituted by chlorine, methyl or methoxy, dialkylaminoalkyl having a total of 3 to 7 carbon atoms or phenethyl and, if n is the number 0, also hydrogen, R.sub.3 is hydrogen, alkyl having 1 to 6 carbon atoms, hydroxyalkyl having 2 or 3 carbon atoms, cyanoalkyl having 2 to 4 carbon atoms, carboxyalkyl having 2 or 3 carbon atoms, carbamoylmethyl which is unsubstituted or substituted on the nitrogen atom by 1 or 2 alkyl having 1 to 3 carbon atoms, alkoxycarbonylalkyl having a total of 3 to 6 carbon atoms, alkenyl having 3 or 4 carbon atoms or benzyl which is unsubstituted or substituted by chlorine or methyl, R.sub.4 is hydrogen, chlorine, bromine, fluorine, carboxyl carbalkoxy having a total of 2 to 5 carbon atoms, alkoxyalkoxycarbonyl having a total of 4 to 6 carbon atoms, benzyloxycarbonyl, cyano, sulpho, alkylsulphonyl having 1 to 4 carbon atoms, carbamoyl or sulphamoyl which are unsubstituted or substituted by 1 or 2 alkyl groups having 1 to 4 carbon atoms, or sulphonic acid phenyl ester or trifluoromethyl, R.sub.5 is hydrogen, chlorine or methyl, R.sub.6 is hydrogen or chlorine, n is the number 0 or 1 and A.sup..crclbar. is a colorless anion equivalent to the cation of the fluorescent brightener, their preparation as well as their use for optically brightening organic materials are disclosed.

REFERENCES:
patent: 3497525 (1970-02-01), Harnisch et al.
patent: 3637734 (1972-01-01), Harnisch et al.
patent: 4018789 (1977-04-01), Littlewood et al.
Kada, Coll. Czch. Chem. Commun., vol. 38 (1973), pp. 1700-1704.

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