Patent · US Expired

Process for the production of 5,6-dihydroxyindolines

US5399713A · kind A · utility

5Cited by

0References

18Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Georg Knuebel · Goldkronach, DE
Guenther Konard · Hilden, DE
Roswitha Michel · Goldkronach, DE

Key dates

Filing date	Mar 18, 1994
Grant date	Mar 21, 1995
Priority date	—
Expiry date	Mar 18, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D209/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for the production of 5,6-dihydroxyindolines by ether cleavage of corresponding ether procursors with aqueous hydrogen bromide and subsequent direct crystallization from the aqueous reaction mixture.

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