3-benzylidene benzheterazoles in ultraviolet screening compositions

US4775526A · kind A · utility

Assignee

• L'Oreal · FR

Inventors

• Gerard Lang · Saint-Gratien, FR
• Serge Forestier · Claye-Souilly, FR
• Herve Richard · Villepinte, FR

Key dates

• Filing date: Dec 30, 1986
• Grant date: Oct 4, 1988
• Expiry date: Dec 30, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D513/04
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A compound of formula: ##STR1## wherein: x is oxygen, sulphur or an --NR--group, wherein R is hydrogen or a C.sub.1 -C.sub.6 alkyl group; PA1 R.sub.1 is hydrogen or a C.sub.1 -C.sub.6 alkyl, a C.sub.1 -C.sub.6 alkoxy, an -- SO.sub.2 Cl or -- SO.sub.2 NR.sub.4 R.sub.5 group wherein R.sub.4 and R.sub.5, which may be identical or different, are hydrogen, a C.sub.1 -C.sub.12 alkyl or C.sub.2 -C.sub.4 hydroxyalkyl group, or R.sub.1 is an --SO.sub.3 H or --SO.sub.3.sup..crclbar. M.sup..sym. group wherein M is potassium or sodium or an N(R.sub.6).sub.4.sup..sym. group, wherein each R.sub.6, which may be identical or different, is hydrogen, a C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.4 hydroxyalkyl group; PA1 R.sub.2 is hydrogen, a C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy group, or R.sub.1 and R.sub.2 together are a methylenedioxy group; PA1 R.sub.3 is hydrogen or an --SO.sub.3 H, --SO.sub.3.sup..crclbar. M.sup..sym. or --SO.sub.2 NR.sub.4 R.sub.5 group wherein M, R.sub.4 and R.sub.5, which may be the identical or different to the M, R.sub.4 and R.sub.5 groups respectively above, have the same meanings as above is useful in cosmetics for protection against ultra-violet rays.