Catalytic Asymmetric Total Synthesis of the Muscarinic Receptor Antagonist (R)-Tolterodine
作者:Christian Hedberg、Pher?G. Andersson
DOI:10.1002/adsc.200404234
日期:2005.4
A convenient and high yielding method for the preparation of (R)-tolterodine, utilizing a catalytic asymmetric Me-CBS reduction was developed. Highly enantioenriched (R)-6-methyl-4-phenyl-3,4-dihydrochromen-2-one (94% ee) was recrystallized to yield practically enantiopure material (ee >99%) and converted to (R)-tolterodine in a four-step procedure. The configuration of the crucial stereocenter was
开发了一种利用催化不对称Me-CBS还原反应制备(R)-托特罗定的便捷,高产方法。将高度对映体富集的(R)-6-甲基-4-苯基-3,4-二氢铬基-2-酮(94%ee)重结晶,得到几乎对映纯的材料(ee> 99%),并在(A)中转化为(R)-托特罗定一个四步过程。关键的立体中心的构型在合成过程中得以保留,并且所获得的产物通过手性HPLC鉴定为(R)-托特罗定对映异构体。