Patent · US Expired

Process for the preparation of difluorobenzodioxole and chlorofluorobenzodioxole

US5350865A · kind A · utility

0Cited by

9References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Erwin Schnalke · Cologne, DE
Josef Heinrich · Langenfeld, DE
Fritz Doring · Odenthal, DE

Key dates

Filing date	Sep 24, 1993
Grant date	Sep 27, 1994
Priority date	—
Expiry date	Sep 24, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D317/46
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A novel process for the preparation of benzodioxoles of the formula (I) ##STR1## in which Hal represents a chlorine atom or a fluorine atom, from dichlorobenzodioxole using stoichiometric quantities of anhydrous hydrofluoric acid.

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