Diisopropylethylamine → (R)-3-(5-bromo-pyrimidin-2-ylamino)-piperidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

To a solution of (R)-3-amino-1-N-Boc-piperidine (920 mg) in dry EtOH (20 mL) were added successively 5-bromo-2-chloropyrimidine (957 mg), DIEA (0.86 mL). The reaction mixture was stirred at reflux for 16 hours under nitrogen. After cooling to RT, the reaction mixture was diluted with EA, washed with sat. NaHCO3, 1N NaOH. The organic extract was dried (MgSO4), filtered and concentrated to yield a crude brown-orange oil. FC (EA/n-heptane: 2/8) gave 787 mg (48%) of the title compound as a light brown solid.

Provenance & Evidence