Patent · US Expired

Preparation of addition salts of cysteamine with acids

US5017725A · kind A · utility

2Cited by

4References

3Claims

0Family size

Assignee

BASF SE

Inventors

Andreas Hohmann · Ludwigshafen, DE
Wolfgang Reuther · Neckargemünd, DE
Rolf Fikentscher · Ludwigshafen, DE
Theo Proll · Bad Dürkheim, DE

Key dates

Filing date	Jan 30, 1990
Grant date	May 21, 1991
Priority date	—
Expiry date	Jan 30, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C323/25
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Addition salts of cysteamine with acids are prepared by reacting aziridine with an organic sulfur compound of oxidation state -2 and with a ketone and then subjecting the thiazolidine formed as an intermediate to acid hydrolysis, by a process in which aziridine and the ketone are reacted with ammonium hydrogen sulfide or with a metal hydrogen sulfide with the addition of a moderately strong or strong acid at from -10.degree. to +100.degree. C. and a pH which is greater than or equal to 8.5 is maintained.

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