Patent · US Expired

Process for the preparation of acylbenzenes

US5434310A · kind A · utility

3Cited by

4References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Helmut Waldmann · Leverkusen, DE
Manfred Hajek · Leverkusen, DE
Otto Immel · Krefeld, DE
Lothar Puppe · Burscheid, DE
Rudolf Braden

Key dates

Filing date	Jan 12, 1994
Grant date	Jul 18, 1995
Priority date	—
Expiry date	Jan 12, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/46
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Acylbenzenes of the formula ##STR1## can be prepared by reaction of benzene with carboxylic acids of the formula EQU HOOC--R.sup.1 (II) where R.sup.1 has the meaning given in the text, using a molar ratio of benzene:carboxylic acid=1-50:1 at a temperature of 200.degree.-400.degree. C., a zeolite of the Pentasil type having an SiO.sub.2 /M.sup.2 O.sub.2 ratio of 15-500:1 being used as acid catalyst; in the latter formula, M.sup.2 is one element or more from the group comprising Al, B, Ga, In, Fe, Cr, V, As and Sb.

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