Sandoz Gmbh

Sandoz Ltd., (sandoz Ag)

Alec Victor Mercer

Fritz Fleck

Ivan Joseph Bolton

Peter Stuart Littlewood

Roger Paver

John Stephen Oakland

Malcolm Oates

Compounds of formula I ##STR1## in which X is O or S;

Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical

The invention relates to stilbene derivatives which are used as optical brightening agents, particularly as anionic brightening agents for polyamide and cellulosic substrates. These stilbene derivatives have the formula I ##STR1## in which both X's are the same and are CR.sub.5 or N, where R.sub.5 is hydrogen, C.sub.1-4 alkyl or phenyl;

Bis-triazolyl and bis-pyrazolyl stilbene compounds

Disclosed are compounds of formula I, ##STR1## in which X signifies hydrogen, C.sub.1-4 alkyl, cyano, --COOM, --COOR.sub.1, --CONR.sub.2 R.sub.3, --SO.sub.2 NR.sub.2 R.sub.3, --SO.sub.2 R.sub.1, --SOR.sub.1, --SO.sub.3 R.sub.1 or --SO.sub.3 M,

Triazolyl stilbene triazoles

Disclosed are compounds of formula I, ##STR1## in which either R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms, an alkoxy radical of 1 to 4 carbon atoms, a cyano group, a group --SO.sub.3 M, an unsubstituted phenyl radical or a phenyl radical substituted by up to 2 substituents selected from chlorine, fluorine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and the group --SO.sub.3 M, with the proviso that only one of R.sub.1, R.sub.2 and R.sub.3 signifies an unsubstituted or substituted phenyl radical

1,3-Diaryl-2-pyrazoline derivatives

Disclosed are anionic optical brightening agents, such agents being 1,3-diphenyl pyrazolines characterized by having, in the 4- or 5-position of the pyrazoline ring, a sulphoalkyl substituent, their production and use.

1,3-Diphenyl-4 or 5-sulphoalkyl pyrazolines

1,3-Diphenyl substituted pyrazolines having, in the 4- or 5-position of the pyrazoline ring, a sulpho group in free acid or salt form, and the use thereof as optical brightening agents, particularly for synthetic polyamide.

1,3-Diphenyl substituted pyrazolines

Disclosed are optical brightening agents, such agents being 2-(2')-benzimidazoyl-furans substituted in the 5-position of the furan ring by a 1-aryl-pyrazolyl-3, -4 or -5 radical, by a pyrazolyl-1 radical or by a 2-aryl-v-triazolyl-4 radical, such compounds being in free base, acid addition or quaternary ammonium salt form.

5-Substituted-2-(2')-benzimidazoyl-furans

Disclosed are compounds of formula I, ##STR1## in which either R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms, an alkoxy radical of 1 to 4 carbon atoms, a cyano group, a group --SO.sub.3 M, an unsubstituted phenyl radical or a phenyl radical substituted by up to 2 substituents selected from chlorine, fluorine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and the group --SO.sub.3 M, with the proviso that only one of R.sub.1, R.sub.2 and R.sub.3 signifies an unsubstituted or substituted phenyl radical, Or two of

1,3-Diphenyl pyrazolines

The invention provides novel pyrazoline derivatives which are useful as optical brighteners.

Pyrazoline compounds

The invention relates to optical brightening agents.

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Leeds, United Kingdom

Alec Victor Mercer