Patent · US Expired

Process for the preparation of 3-aryl-benzofuranones

US6417358B1 · kind B1 · utility

3Cited by

3References

17Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Michael Tinkl · Weil am Rhein, DE
Samuel Evans · Marly, CH
Peter Nesvadba · Marly, CH

Key dates

Filing date	Dec 22, 2000
Grant date	Jul 9, 2002
Priority date	—
Expiry date	Dec 22, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C49/603
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for the preparation of compounds of formula (I), wherein the general symbols are as defined in claim 1, which process comprises reacting a compound of formula (V), wherein the general symbols are as defined in claim 1, with carbon monoxide in the presence of a catalyst.

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