1-Benzylpiperazine → HCID 22174883, compound

Participants

Reaction Steps

To a solution of 4-[3,5-dimethyl-1-(4-pyridin-2-yl-pyrimidin-2-yl)-1H-pyrazol-4-yloxy]-benzaldehyde (0.545 g, 1.47 mmol) and 1-benzylpiperazine (0.310 g, 1.76 mmol) in dichloroethane (10 mL) was added sodium triacetoxyborohydride (0.436 g, 2.06 mmol). The reaction mixture was stirred at room temperature for 17 hours. The solution was diluted with methylene chloride (50 mL) and washed with saturated sodium hydrogencarbonate (2×30 mL) and brine (50 mL). The organic phase was dried (magnesium sulfate), filtered, and concentrated to afford a yellow oil. Flash chromatography over silica (2 M ammonia in methanol/methylene chloride) provided 0.183 g (23%) of the product as a white foam: 1H NMR (CDCl3) δ 8.94–8.93 (m, 1H), 8.75 (d, J=3.9 Hz, 1H), 8.46 (d, J=7.9 Hz, 1H), 8.25 (d, J=3.9 Hz, 1H), 7.90–7.87 (m, 1H), 7.46–7.43 (m, 1H), 7.31–7.21 (m, 7H), 6.89 (d, J=8.5 Hz, 2H), 3.52 (s, 2H), 3.47 (s, 2H), 2.68 (s, 3H), 2.48 (br s, 8H), 2.21 (s, 3H) ppm.

Provenance & Evidence