ASYMMETRIC PROCESS FOR PREPARING FLORENICOL, THIAMPHENICOL, CHLORAMPHENICOL AND OXAZOLINE INTERMEDIATES

The present invention comprises a process for the asymmetric synthesis of florfenicol, thiamphenicol or chloramphenicol. In an alternative embodiment, the present invention comprises a process for isomerizing of the S,S-isomer of florfenicol to the R,S-isomer (I) by sequentially treating with: (i) a...

Full description

Saved in:
Bibliographic Details
Main Authors WU GUANG-ZHONG, TORMOS WANDA I
Format Patent
LanguageEnglish
Published 06.12.1995
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
Online AccessGet full text

Cover

More Information
Summary:The present invention comprises a process for the asymmetric synthesis of florfenicol, thiamphenicol or chloramphenicol. In an alternative embodiment, the present invention comprises a process for isomerizing of the S,S-isomer of florfenicol to the R,S-isomer (I) by sequentially treating with: (i) a lower alkylsulfonyl chloride and a tertiary amine base; (ii) sulfuric acid and water; (iii) an alkali metal hydroxide. The present invention further comprises a process for regioselectively opening an epoxide to form a threo-oxazoline.
Bibliography:Application Number: SK19950000777