Method for producing lamotrigine from &agr;-oxo-2,3-dichlorophenyl acetamidino-aminoguanidino hydrazone by ring closure reaction
申请人:Helm AG
公开号:US06683182B2
公开(公告)日:2004-01-27
The present invention relates to a method for producing 3,5-diamino-6-(2,3-dichlorophenyl)-1,2,4-triazine (lamotrigine) by cyclization reaction from &agr;-oxo-2,3-dichlorophenylacetamidino-aminoguanidino-hydrazone.