Triphenylphosphine → 1,1-dimethylethyl 4-[2-(5-bromo-4-chloro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-1-piperidinecarboxylate

Participants

Reaction Steps

To 5-bromo-4-chloro-1H-pyrrolo[2,3-d]pyrimidine (200 mg, 0.860 mmol) in Tetrahydrofuran (THF) (10 mL) was added 1,1-dimethylethyl 4-(2-hydroxyethyl)-1-piperidinecarboxylate (592 mg, 2.58 mmol) and polymer bound triphenylphosphine (574 mg, 1.721 mmol) resin. To the mixture was then added dropwise DEAD (0.272 mL, 1.721 mmol). The stir bar was then removed from the reaction and the reaction was then placed on to a horizontal shaker and the reaction was agitated at room temp overnight. The resin was filtered off and the filtrated was concentrated then loaded on to a 10 g Biotage SNAP column and eluded with 0 to 45% EtOAc in Hexane to give 1,1-dimethylethyl 4-[2-(5-bromo-4-chloro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-1-piperidinecarboxylate (326 mg, 85% yield) as a white solid. LC-MS (ES) m/z=443.4 [M+H]+.

Provenance & Evidence