Patent · US Expired

1-Hydroxypyrazole

US4350819A · kind A · utility

3Cited by

0References

1Claims

0Family size

Assignee

BASF SE

Inventors

Norbert Rieber · Mannheim, DE
Heinrich Bohm · Schifferstadt, DE
Rolf Platz
Werner Fuchs · Herrsching am Ammersee, DE

Key dates

Filing date	Jul 17, 1981
Grant date	Sep 21, 1982
Priority date	—
Expiry date	Jul 17, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D231/12
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

1-Hydroxypyrazole and a process for its preparation by conversion of isoxazolineazoxy compounds at 140.degree.-600.degree. C. The end products obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

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