[EN] PROCESS FROM SHIKIMIC ACID TO OSELTAMIVIR PHOSPHATE<br/>[FR] PROCÉDÉ DE L'ACIDE SHIKIMIQUE AU PHOSPHATE D'OSELTAVIMIVIR
申请人:HOFFMANN LA ROCHE
公开号:WO2009037137A2
公开(公告)日:2009-03-26
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 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-( l-ethyl-propoxy)-cyclohex-l-ene-carboxylic acid ethyl ester and its pharmaceutically acceptable additional salts are potent inhibitors of viral neuraminidase.