申请人:——
公开号:US20010016669A1
公开(公告)日:2001-08-23
The invention relates to a process for the enantioselective preparation of tolterodine and analogues and salts thereof comprises the steps of:
a) enantioselectively reducing the carbonyl function in a compound of formula (II):
1
wherein R
1
, R
2
and R
3
independently of each other are hydrogen, methyl, methoxy, hydroxy, hydroxymethyl, carbamoyl, sulphamoyl or halogen, to form an enantiomerically enriched compound of formula (IIIa) or (IIIb):
2
wherein R
1
, R
2
and R
3
are as defined above;
b) subjecting the compound of formula (IIIa) or (IIIb) to a sigmatropic rearrangement to form a corresponding enantiomerically enriched compound of formula (IVa) or (IVb):
3
wherein R
1
, R
2
and R
3
are as defined above;
c) subjecting the compound of formula (IVa) or (IVb) to a Baeyer-Villiger oxidation to form a corresponding enantiomerically enriched compound of the general formula (Va) or (Vb):
4
wherein R
1
, R
2
and R
3
are as defined above;
d) converting the compound of formula (Va) or (Vb) to form the corresponding enantiometrically enriched compound of tolterodine or analogue, and
e) optionally converting a compound obtained in base form to a salt thereof, or converting a salt form to the free base.
The invention also relates to novel starting materials and intermediates used in the process.
本发明涉及一种手性选择性制备托吡酯及其类似物和盐的方法,包括以下步骤:
a) 手性选择性还原式II化合物中的羰基官能团,其中式中R1、R2和R3独立地为氢、甲基、甲氧基、羟基、羟甲基、氨基甲酰基、磺酰基或卤素,以形成手性富集的IIIa或IIIb式化合物,其中R1、R2和R3如上所定义;
b) 将IIIa或IIIb式化合物进行σ-移位重排,以形成相应的手性富集IVa或IVb式化合物,其中R1、R2和R3如上所定义;
c) 将IVa或IVb式化合物进行Baeyer-Villiger氧化,以形成相应的手性富集Va或Vb式化合物,其中R1、R2和R3如上所定义;
d) 转化Va或Vb式化合物,以形成相应的手性富集托吡酯或类似物;
e) 可选地将获得的碱性化合物转化为其盐形式,或将盐形式转化为自由碱。
本发明还涉及在该过程中使用的新型起始材料和中间体。