申请人:——
公开号:US20030191348A1
公开(公告)日:2003-10-09
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.
本发明涉及一种对托吡酯及其类似物和盐进行对映选择性制备的过程,包括以下步骤:
a) 对式(II)的化合物进行对映选择性的羰基还原,其中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,以形成对映富集的式(IIIa)或(IIIb)的化合物:
其中R1、R2和R3如上所定义;
b) 将式(IIIa)或(IIIb)的化合物进行sigma迁移重排,以形成相应的对映富集的式(IVa)或(IVb)的化合物:
其中R1、R2和R3如上所定义;
c) 将式(IVa)或(IVb)的化合物进行Baeyer-Villiger氧化,以形成相应的通式(Va)或(Vb)的对映富集的化合物:
其中R1、R2和R3如上所定义;
d) 转化式(Va)或(Vb)的化合物,以形成相应的对映富集的托吡酯或类似物,以及
e) 可选地将得到的碱性化合物转化为其盐形式,或将盐形式转化为其自由碱形式。
本发明还涉及在该过程中使用的新起始材料和中间体。