Chiral Resolution and Stereospecificity of 6-Phenyl-4-phenylethynyl- 1,4-dihydropyridines as Selective A<sub>3</sub> Adenosine Receptor Antagonists
作者:Ji-long Jiang、An-Hu Li、Soo-Yeon Jang、Louis Chang、Neli Melman、Stefano Moro、Xiao-duo Ji、Emil B. Lobkovsky、Jon C. Clardy、Kenneth A. Jacobson
DOI:10.1021/jm980688e
日期:1999.8.1
(S)-(+)-2, 2-dimethyl-1,3-dioxolane-4-methanol, allowed the selective crystallization of a pure diastereomer, 9. The (1)H NMR spectrum of 9 using the lanthanideshiftreagent Eu(fod)(3) indicated optical purity, and the (4S,2'R)-configuration was assigned usingX-ray crystallography. The noncrystalline (4R,2'R)-isomer 10 was also isolated and shown to be 3-fold more potent than the (4S,2'R)-isomer in binding