[EN] PROCESS FOR THE PREPARATION OF GABAPENTIN<br/>[FR] METHODE SERVANT A PREPARER GABAPENTINE
申请人:SANDOZ AG
公开号:WO2006002972A1
公开(公告)日:2006-01-12
The present invention relates to a new process for the preparation of gabapentin by the neutralization of an acid addition salt of gabapentin in an organic solvent or a mixture of organic solvents with a quaternary ammonium hydroxide.
Process for the preparation of amino methyl cyclo alkane acetic acids
申请人:Kuppuswamy Nagarajan
公开号:US20060149099A1
公开(公告)日:2006-07-06
This invention relates to an improved process for the preparation of amino methyl cyclo alkane acetic acids. This invention particularly relates to an improved process for the preparation of gabapentin (which is chemically known as 1-aminomethyl-1-cyclohexaneacetic acid), which is a very well known agent useful for the treatment of epilepsy and other cerebral disorders. In the chemical series of 1-amino methyl cyclo alkane-1-acetic acids, Gabapentin, which is 1-amino methyl cyclo hexane-1-acetic acid has been developed as a drug having anti convulsive properties.
[EN] PROCESS FOR THE PREPARATION OF AMINO METHYL CYCLO ALKANE ACETIC ACIDS<br/>[FR] PROCEDE DE PREPARATION D'ACIDES AMINO-METHYL-CYCLOALCANE ACETIQUES
申请人:HIKAL LTD
公开号:WO2004046085A1
公开(公告)日:2004-06-03
This invention relates to an improved process for the preparation of amino methyl cyclo alkane acetic acids. This invention particularly relates to an improved process for the preparation of gabapentin (which is chemically known as 1-aminomethyl-1-cyclohexaneacetic acid), which is a very well known agent useful for the treatment of epilepsy and other cerebral disorders. In the chemical series of 1-amino methyl cyclo alkane-1-acetic acids, Gabapentin, which is 1-amino methyl cyclo hexane -1-acetic acid has been developed as a drug having anti convulsive properties.
[EN] A PROCESS FOR THE PREPARATION OF GABAPENTIN FORM-II<br/>[FR] PROCEDE PERMETTANT LA PREPARATION DE GABAPENTINE DE FORME II
申请人:MATRIX LAB LTD
公开号:WO2004110981A1
公开(公告)日:2004-12-23
The present invention relates to a new industrial feasible process for the preparation of Gabapentin Form-Ill by reacting 1,1-cyclohexane diacetic acid mono amide with alkali hypohalite followed by acidification with acids in presence of an organic solvent, extracting the liberated acid salt into that solvent followed by addition of an ante solvent to crystallize the Gabapentin acid salts. The separated salt is then suspending in organic solvent(s) and pH is adjusted with a base(s) at a specified temperature range, cooled to ambient temperature, followed by separation of Gabapentin Form-III, which is further converted to Gabapentin Form-II by slurrying in ethanol at specified temperature.
Process and Methods for the Preparation of Gabapentin and Its Intermediates
申请人:Bosch I Llado Jordi
公开号:US20090043126A1
公开(公告)日:2009-02-12
The invention provides a process for preparing gabapentin and its intermediates. The process generally involves treating gabapentin lactam with an aqueous solution of hydrobromic acid to yield gabapentin hydrobromide salt as an intermediate, which can be isolated by filtration. The gabapentin hydrobromide salt can then be hydrolyzed with a base, such as an organic amine, to yield gabapentin that can be isolated by filtration.