And practical process for exclusively producing...

Details And practical process for exclusively producing... And practical process for exclusively producing...

Filed on

2011-06-21

Date issued

2011-06-21

Examiner

Habte, Kahsay T (Department: 1624)

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Chalcogen in the nitrogen containing substituent

Other Related Categories

C514S229800

Type

Reexamination Certificate

Status

active

Patent number

07964723

Description

ABSTRACT:
A novel and practical process for selectively producing a pyridobenzoxazine carboxylic acid hemihydrate (e.g., (S)-9-fluoro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-2,3-dihydro-7H-pyrido-[1,2,3-de] [1,4]benzoxazine-6-carboxylic acid hemihydrate) in high yield via crystallization from an organic solvent or a mixed organic solvent system containing a calculated amount of water released from sodium sulfate decahydrate under gradually heating.

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International Search Report for PCT/US2008/080740.

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