ASYMMETRIC SYNTHESIS METHOD, RELATED RAW MATERIAL AND PREPARATION METHOD OF (S,S)-2,8-DIAZABICYCLO[4,3,0]NONANE
申请人:Shanghai Puyi Chemical Technology Co.,Ltd
公开号:US20140066626A1
公开(公告)日:2014-03-06
The present invention relates to an asymmetric synthesis method of a chiral intermediate (S,S)-2,8-diazabicyclo[4,3,0]nonane (I) of moxifloxacin, wherein an imide or enamine compound is obtained by dehydration reaction of the pyrrolidine-3-ketone as shown in formula (II) and chiral amine(R)-1-phenylethylamine, followed by the reduction of the imide or enamine compound to obtain a compound of formula (III) or (IV) having the chiral structure of formula (I), and then a compound of formula (I) is obtained by intramolecular cyclization, and removal of the chiral auxiliary group and amino-protecting group. The present invention also relates to pyrrolidine-3-ketone as shown in formula (II) and a preparation method therefor,
and in the formula (I), (II), (III), (IV), R is an amino-protecting group, especially C
1-4
alkoxycarbonyl, benzyloxycarbonyl or benzyl which can be removed by hydrolysis or hydrogenation. Z═H
2
or O; when Z═H
2
, Y is chlorine, bromine, iodine, methanesulfonate, tosylate, hydroxyl or hydroxyl with protection; and when Z═O, Y is OR
1
, and R
1
is C
1-4
alkyl.
本发明涉及莫西沙星的手性中间体(S,S)-2,8-二氮杂双环[4,3,0]壬烷(I)的不对称合成方法,其中通过公式(II)所示的吡咯烷-3-酮的脱水反应和手性胺(R)-1-苯乙胺的缩合反应得到亚酰亚胺或烯胺化合物,随后还原亚酰亚胺或烯胺化合物得到具有公式(III)或(IV)手性结构的化合物,然后通过分子内环化反应得到公式(I)化合物,并去除手性辅助基团和氨基保护基团。本发明还涉及公式(II)的吡咯烷-3-酮及其制备方法,公式(I)、(II)、(III)、(IV)中,R为氨基保护基团,特别是可以通过水解或氢化去除的C1-4烷氧羰基、苄氧羰基或苯甲基。Z=H2或O;当Z=H2时,Y为氯、溴、碘、甲磺酸盐、对甲苯磺酸盐、羟基或带保护的羟基;当Z=O时,Y为OR1,其中R1为C1-4烷基。