专利号:US-6403824-B2 优先权日:2000-02-22 标 题:Process for the preparation for 4,5-diamino shikimic acid derivatives 发明人:ABRECHT STEFAN; KARPF MARTIN; TRUSSARDI RENE; WIRZ BEAT 权利人:HOFFMANN LA ROCHE 摘要:The invention provides a multistep synthesis for the preparation of 4,5-diamino shikimic acid derivatives of formulawherein R1, R2, R3 and R4 are defined in the specification, starting from furan. 4,5-Diamino shikimic acid derivatives are potent inhibitors of viral neuraminidase.