Patent · US Active

Purification of beta-lactam products

US7728126B2 · kind B2 · utility

0Cited by

2References

11Claims

0Family size

Assignee

ACS Dobfar S.p.A. · IT

Inventors

Giovanni Fogliato · Barzana, IT
Marco Forzatti · Monza, IT
Maurizio Zenoni · Paullo, IT

Key dates

Filing date	Aug 17, 2006
Grant date	Jun 1, 2010
Priority date	—
Expiry date	Jan 23, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D501/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Method for purifying 7α-methoxy-cephalosporins containing as impurity the corresponding 7α-methylthio analogue, which is transformed into its methoxy analogue by treatment with a halogenating agent in methanol. In this way the complete conversion of the sulphurated impurity into the corresponding methoxy analogue is obtained.

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