tert-Butanol → HCID 67386358, compound

Participants

Reaction Conditions

Reaction Steps

A microwave vial was charged with 2-ethynyl-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide (100 mg, 0.20 mmol), azidocyclopentane (32.9 mg, 0.3 mmol), t-BuOH (0.6 mL), and H2O (0.6 mL). To this sticky mixture was added 1.0 M aqueous copper (II) sulfate (39.5 μL, 0.04 mmol) and copper powder (10.0 mg, 0.16 mmol). The vial was sealed and the heterogeneous reaction mixture was heated in a microwave reactor at 125° C. for 5 min. The reaction mixture was cooled to room temperature and filtered, rinsing with EtOAc. The filtrate was washed with water, dried over MgSO4, and concentrated. The residue was purified by silica gel chromatography (50% to 100% EtOAc/hexanes) to afford 85 mg (70%) of 2-(1-cyclopentyl-1H-[1,2,3]triazol-4-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide as an off-white foamy solid.

Provenance & Evidence