Sodium hydride → 1-{[2-tert-butyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-benzimidazol-5-yl]sulfonyl}-N-cyclopropyl-1H-pyrazole-4-carboxamide

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (0.98 g, 60%, 25 mmol) was added to a solution of N-cyclopropyl-1H-pyrazole-4-carboxamide (0.49 g, 3.5 mmol) (see following steps B and C for preparation) in 40 mL of THF-DMF (3:1) at 0° C. Stirring for 1 h at 0° C. and 0.5 h at room temperature, 2-tert-butyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-benzimidazole-5-sulfonyl chloride (1.30 g, 3.5 mmol) was added. The reaction mixture was stirred for 2 h at 0° C., quenched with NaHCO3 (10 mL) and extracted with EtOAc (3×50 mL). The combined organic phases were washed with NaCl (20 mL) and dried over Na2SO4. The crude product was purified by MPLC using Hex/EtOAc (1:2) on silica gel to give 0.54 g (33%) of a white solid as the title compound. 1H NMR (400 MHz, METHANOL-D4) δ 0.52-0.59 (m, 2 H), 0.71-0.79 (m, 2 H), 1.39-1.57 (m, 4 H), 1.60 (s, 9 H), 2.22-2.37 (m, 1 H), 2.71-2.79 (m, 1 H), 3.26-3.34 (m, 2 H), 3.86-3.93 (m, 2 H), 4.43 (d, J=7.62 Hz, 2 H), 7.91-7.95 (m, 1 H), 7.97-8.01 (m, 1 H), 8.03 (d, J=0.78 Hz, 1 H), 8.34 (d, J=1.37 Hz, 1 H), 8.74 (d, J=0.59 Hz, 1 H); MS (ESI) (M+H)+=485.8.

Provenance & Evidence