申请人:Liu Xuewei
公开号:US20110021762A1
公开(公告)日:2011-01-27
A process is provided for the synthesis of 4,5-diamino cyclohexene carboxylate ester (1): or a pharmaceutically acceptable salt thereof. R
1
-R
3
are a silyl-, an aliphatic, alicyclic, aromatic, arylaliphatic, or an arylalicyclic group. R
4
, R
11
and R
12
are H, a silyl-group, an aliphatic, alicyclic, aromatic, arylaliphatic, or an arylalicyclic group. 3,4-Dihydropyran compound (9): with R
5
and R
6
being suitable protecting groups, is reacted to form aldehyde (4): which is oxidized and converted to N-substituted carbamate (3): with R
7
being a suitable protecting group. (3) is, via oxazolinidone (13): converted to azido carboxylate ester (2): and then to 4,5-diamino cyclohexene carboxylate ester (1).
本发明提供了一种合成4,5-二氨基环己烯羧酸酯(1)或其药学上可接受的盐的方法。其中R1-R3是硅基,脂肪基,脂环基,芳香基,芳脂基或芳环脂基。R4,R11和R12是氢,硅基,脂肪基,脂环基,芳香基,芳脂基或芳环脂基。将带有R5和R6适当保护基的3,4-二氢吡喃化合物(9)反应生成醛(4),然后氧化并转化为带有R7适当保护基的N-取代氨基甲酸酯(3)。通过氧杂环丙氨酮(13)将(3)转化为偶氮羧酸酯(2),然后再转化为4,5-二氨基环己烯羧酸酯(1)。