Patent · US Expired

Enantiomers of 1[(4-chloro-phenyl) phenylmethyl]-4-[(4-methylphenyl) sulfony]piperazine

US6436942B1 · kind B1 · utility

0Cited by

12References

1Claims

0Family size

Assignee

UCB S.A. · BE

Inventors

Eric Cossement · Brussels, BE
Guy Bodson · Virton, BE
Jean Gobert · Maisons-Alfort, FR

Key dates

Filing date	Jul 19, 1999
Grant date	Aug 20, 2002
Priority date	—
Expiry date	Jul 19, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D295/26
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Levorotatory and dextrorotatory enantiomers of 1-[(4-chlorophenyl)phenylmethyl]-4-[(4-methylphenyl)sulfonyl]piperazine of the formula their preparation and use for the preparation of substantially optically pure enantiomers of 1-[(4-chlorophenyl)phenylmethyl]piperazine, which are themselves valuable intermediate products for the preparation of optically active therapeutic compounds having a very high degree of optical purity.

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