Patent · US Expired

Preparation of novel dibenzoylmethane derivative sunscreen agents

US4562067A · kind A · utility

55Cited by

2References

6Claims

0Family size

Assignee

Haarmann & Reimer Corporation · DE

Inventors

Rudolf Hopp · Holzminden, DE
Horst Finkelmeier · Holzminden, DE
Roland Langner · Holzminden, DE

Key dates

Filing date	Jan 12, 1984
Grant date	Dec 31, 1985
Priority date	—
Expiry date	Jan 12, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C49/84
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The new dibenzoylmethane derivatives of the formula ##STR1## in which R.sup.1 denotes hydrogen, methyl or ethyl and PA1 R.sup.2 denotes methyl or ethyl and PA1 R.sup.3 represents a straight-chain or branched lower alkyl radical, can be prepared by reacting acetophenone derivatives with an anisic ester or by reacting a substituted benzoic ester with p-methoxyacetophenone. The compounds can be used in sunscreen agents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.