Sodium cyanoborohydride → HCID 86697545, compound

Participants

Reaction Conditions

Reaction Steps

9-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-7-chloro-2-methyl-2,3,4,5-tetrahydro-1,4-benzoxazepine-6-carbonitrile bishydrochloride (20 mg, 0.05 mmol) from Example 59, step 1, was dissolved in methanol (1.1 mL), and the tert-butyl (3-oxocyclobutyl)carbamate (0.019 g, 0.10 mmol) was added, followed by the sodium cyanoborohydride (0.0063 g, 0.10 mmol). The reaction was heated to 60° C. for 2 h, allowed to cool, diluted with water, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over magnesium sulfate, filtered, and concentrated to give tert-butyl {3-[9-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-7-chloro-6-cyano-2-methyl-2,3-dihydro-1,4-benzoxazepin-4(5H)-yl]cyclobutyl}carbamate. LCMS calculated for C28H36ClN8O3 (M+H)+: m/z=567.2; found: 567.3.

Provenance & Evidence