申请人:Karpf Martin
公开号:US20060047002A1
公开(公告)日:2006-03-02
The present invention relates to a process for the preparation of a 4,5-diamino shikimic acid derivative of formula
and pharmaceutically acceptable addition salts thereof wherein
R
1
, R
1′
are independent of each other H or alkyl,
R
2
is an alkyl and
R
3
, R
4
are independent of each other H or an alkanoyl, with the proviso that not both R
3
and R
4
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-1-ene-carboxylic acid ethyl ester and its pharmaceutically acceptable additional salts are potent inhibitors of viral neuraminidase.
本发明涉及一种制备4,5-二氨基香草酸衍生物的方法,其化学式为及其药学上可接受的加成盐,其中R1,R1'独立地为H或烷基,R2为烷基,R3,R4独立地为H或脂肪酰基,但R3和R4不同时为H。化合物I的4,5-二氨基香草酸衍生物,特别是(3R,4R,5S)-5-氨基-4-乙酰氨基-3-(1-乙基-丙氧基)-环己-1-烯-羧酸乙酯及其药学上可接受的加成盐是病毒神经氨酸酶的有效抑制剂。