[EN] PROCESS FOR THE PREPARATION OF 4,5-DIAMINO SHIKIMICACID<br/>[FR] PROCEDE DE PREPARATION D'ACIDE 4,5-DIAMINO SHIKIMIQUE
申请人:HOFFMANN LA ROCHE
公开号:WO2006024436A1
公开(公告)日:2006-03-09
The present invention relates to a process for the preparation of a 4,5-diamino shikimic acid derivative of formula (I) and pharmaceutically acceptable addition salts thereof wherein R1, R1’ are independent of each other H or alkyl, R2 is an alkyl and R3, R4 are independent of each other H or an alkanoyl, with the proviso that not to both R3 and R4 are H. 4,5-diamino shikimic acid derivatives of formula I, especially the (3R,4R,5S)-5-amino-4-acetylamino-3- (1-ethyl-propoxy)-cyclohex-l-ene-carboxylic acid ethyl ester and its pharmaceutically acceptable additional salts are potent inhibitors of viral neuraminidase.