Triphenylphosphine → Tert-butyl 2-(4-((7-isobutyl-5-methyl-4,6-dioxo-3-(phenylamino)-4,5,6,7-tetrahydropyrazolo[3,4-d]pyrimidin-2-yl)methyl)phenyl)piperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

tert-butyl 2-(4-(hydroxymethyl)phenyl)piperidine-1-carboxylate (47 mg, 0.16 mmol) is dissolved in 1 mL of anhydrous THF, and then triphenylphosphine (42 mg, 0.16 mmol) is added, followed by 7-isobutyl-5-methyl-3-(phenylamino)-2H-pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione (50 mg, 0.16 mmol). The mixture is cooled to −78° C., and then DIAD (95%, 50 μL) is added slowly. After the reaction is complete, the mixture is purified on a basic alumina column to give 76 mg of product (yield: 81%). MS (ESI) m/z 587.3 [M+H]+.

Provenance & Evidence