2-Aminopyrimidine-5-carbaldehyde → 5-(((trans)-2-(4-(Benzyloxy)phenyl)cyclopropylamino)methyl)pyrimidin-2-amine

Participants

Reaction Steps

Sodium triacetoxy borohydride (883 mg, 4.166 mmol) was added slowly at 0° C. to a solution of (trans)-2-(4-(benzyloxy)phenyl)cyclopropanamine (Intermediate B, 500 mg, 2.083 mmol), 2-aminopyrimidine-5-carbaldehyde (256 mg, 2.083 mmol) in DCE (10 mL) and stirred for 20 h. After completion, the solvent was evaporated. The residue was dissolved in Methanol (15 mL), NaBH4 (237 mg, 6.249 mmol) was added slowly at 0° C. and stirred for 3 h. After completion, the solvent was evaporated, the residue was dissolved in ice water (20 mL) and extracted with EtOAc (2×20 mL) The combined organic layers were washed with brine (20 mL) and dried over anhydrous Na2SO4, filtered and evaporated. The crude residue was purified by prep HPLC to afford 5-(((trans)-2-(4-(benzyloxy)phenyl)cyclopropylamino)methyl)pyrimidin-2-amine (180 mg, 25%) as white solid. 1H-NMR (400 MHz, DMSO-d6) δ (ppm): 0.85 (q, 1H), 0.90 (quin, 1H), 1.73 (m, 1H), 2.07 (m, 1H), 2.75 (brs, 1H), 3.53 (s, 2H), 5.04 (s, 2H), 6.46 (s, 2H), 6.85 (d, 2H), 6.92 (d, 2H), 7.33 (m, 1H), 7.42 (m, 4H), 8.11 (s, 2H). Mass (M+H): 347.3

Provenance & Evidence