Patent · US Expired

8-Chloro-5,6,7,8-tetrahydro-2-quinolone and 8-bromo-5,6,7,8-tetrahydro-2-quinolone, the hydrochloride or hydrobromide thereof and process for their manufacture

US4226997A · kind A · utility

1Cited by

3References

12Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Helmut Meidert · Frankfurt am Main, DE
Werner Muller · East Greenwich, US
Wilfried Pressler · Kelkheim, DE

Key dates

Filing date	Sep 13, 1979
Grant date	Oct 7, 1980
Priority date	—
Expiry date	Sep 13, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B29/083
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

8-Chloro-5,6,7,8-tetrahydro-2-quinolone and 8-bromo-5,6,7,8-tetrahydro-2-quinolone, the hydrochloride or hydrobromide thereof and their manufacture by reacting 3,4,5,6,7,8-hexahydro-2-quinolone with chlorine or bromine in an inert solvent at 10.degree. to 50.degree. C. with heating of the reaction mixture to 60.degree. to 80.degree. C. after the halogen addition.

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