Title of Invention	A PROCESS FOR PREPARING ANHYDROUS GABAPENTIN FORM II FROM GABAPENTIN ACID ADDITION SALT
Abstract	The present invention relates to the process -for the preparation of anhydrous Gabapentin of pharmaceutical grade from the Gabapentin acid addition salts. The process consists of neutralizing the said acid addition salts with an organic base inwater to get an aqueous solution comprising of Gabapentin and amine acid addition salt dissolved in water. The process further comprises of a method to separate the Gabapentin and the amine acid addition salt from such an aqueous solution and to recover Gabapentin as an anhydrous Gabapentin form II.

Title of Invention

A PROCESS FOR PREPARING ANHYDROUS GABAPENTIN FORM II FROM GABAPENTIN ACID ADDITION SALT

Abstract

The present invention relates to the process -for the preparation of anhydrous Gabapentin of pharmaceutical grade from the Gabapentin acid addition salts. The process consists of neutralizing the said acid addition salts with an organic base inwater to get an aqueous solution comprising of Gabapentin and amine acid addition salt dissolved in water. The process further comprises of a method to separate the Gabapentin and the amine acid addition salt from such an aqueous solution and to recover Gabapentin as an anhydrous Gabapentin form II.

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Patent Number

224048

Indian Patent Application Number

416/MAS/2003

PG Journal Number

47/2008

Publication Date

21-Nov-2008

Grant Date

24-Sep-2008

Date of Filing

19-May-2003

Name of Patentee

SHASUN CHEMICALS AND DRUGS LIMITED

Applicant Address

AN INDIAN CORPORATION 60 VELACHERY

Inventors:

#	Inventor's Name	Inventor's Address
1	DR. CHANDIRAN THAKASHINA MOORTHY	6 PANDIAN St SHANKARAN AVENUE, VELACHERY BY-PASS RD CHENNAI 600042
2	SOBANA JOTHI	G2 A-BLOCK KALA FLATS 23 VANDIKKARAM ST CHENNAI 600042
3	SENTHIL KUMAR MINOR	26 W-BLOCK FORESHORE ESTATE CHENNAI 28

PCT International Classification Number

C07C207/407

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA