Esters and amides of aminomethylenecyanoacetic acid a cosmetic preparation containing the same as a sunscreen agent and a method for protecting human skin using the same

US5443820A · kind A · utility

Assignee

• BASF SE

Inventors

• Martin Holderbaum · Ludwigshafen, DE
• Alexander Aumueller · Deidesheim, DE
• Hubert Trauth · Dudenhofen, DE

Key dates

• Filing date: Jan 5, 1994
• Grant date: Aug 22, 1995
• Expiry date: Jan 5, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Esters and amides of aminomethylenecyanoacetic acid I ##STR1## where R.sup.1 and R.sup.2 are each, independently of one another, phenyl, naphthyl, biphenylyl or five- or six-membered hetaryl with one, two or three nitrogens or one oxygen or one sulfur or one nitrogen and one oxygen or one nitrogen and one sulfur, which can be benzo-fused, it being possible for these radicals to be substituted by one to three C.sub.1 -C.sub.12 -alkyl groups, C.sub.1 -C.sub.12 -alkoxy groups, halogen atoms, cyano groups, hydroxyl groups or groups of the formulae COOR.sup.3, COR.sup.3, CONHR.sup.3, OCOR.sup.3 or NHCOR.sup.3, and where PA1 R.sup.3 is C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl or phenyl, PA1 X is C.sub.2 -C.sub.30 -alkylene which can be interrupted by non-adjacent oxygens, or is C.sub.4 -C.sub.12 -alkenylene or C.sub.4 -C.sub.12 -alkynylene where the unsaturated bonds are not adjacent to the ester oxygens, or is C.sub.5 -C.sub.8 -cycloalkylene or phenylene, and PA1 Y is O or NH. are used as stabilizers for organic materials.