Cj. Swain et al., QUINUCLIDINE BASED NK-1 ANTAGONISTS .2. DETERMINATION OF THE ABSOLUTESTEREOCHEMICAL REQUIREMENTS, Bioorganic & medicinal chemistry letters, 3(8), 1993, pp. 1703-1706
The relative and absolute stereochemical requirements for high affinit
y binding to the human NK-1 receptor are defined for a series of quinu
clidine ethers. Whilst the S stereochemistry at C-3 is essential for h
igh affinity, surprisingly both epimers at C-2 are active.