390 mg of 1-phenyl-4,6-dichloropyrazolo[3,4-d]pyrimidine was suspended in 15 ml 95% ethanol. 828 mg norephedrine HCl was dissolved in 100 ml H2O, made basic with 10% KOH, and the free base extracted with 100 ml ether. The organic was dried over MgSO4, filtered, and concentrated to yield an oil which was added to the stirred reaction. After 4 hours the solution became clear and the solvent was removed under vacuum. The crude oil was then purified by radial chromatography (5-10-20% isopropyl alcohol/hexane, 4 mm plate) to yield 535 mg of [R-(S*,R*)]-α-[1-[(1-phenyl-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl) amino]ethyl]benzenemethanol (90%).
