Patent · US Expired

Process for the preparation of 2-(4-methylphenyl)-benzoic acid derivatives

US6433214B1 · kind B1 · utility

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7Claims

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Assignee

Dipharma S.p.A. · IT

Inventors

Graziano Castaldi · Briona, IT
Antonio Tarquini · Tortona, IT
Renzo Rossi · Pisa, IT

Key dates

Filing date	Apr 3, 2000
Grant date	Aug 13, 2002
Priority date	—
Expiry date	Apr 3, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/343
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of 2-(4-methylphenyl)benzoic acid C1-6alkyl esters by reaction of a sulfonic derivative of formula wherein R is C1-6alkyl and R1 is optionally perfluorinated C1-6alkyl or optionally substituted C1-6aryl, with a 4-methylphenylzinc halide.

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