Trimethylsilyl isocyanate → HCID 21066310, compound

Participants

Reaction Conditions

Reaction Steps

[3-Bromo-5-(2-chlorophenyl)pyrazolo[1,5-a]pyrimidin-7-yl]piperidin-4-ylmethylamine (57 mg, 0.136 mmoles) (prepared as described in Example 460, Step B above) was dissolved in anhydrous dichloromethane (1.2 mL) and trimethylsilylisocyanate (0.091 mL, 0.679 mmoles) was added. The mixture was stirred at 25° C. for 2.5 h. The mixture was diluted with dichloromethane and washed with saturated aqueous sodium bicarbonate. The organic layer was dried (MgSO4), filtered and evaporated to dryness. The residue was chromatographed on a silica gel column (30×2.5 cm) using 3% (10% conc. ammonium hydroxide in methanol)-dichloromethane as the eluant to give 4-{[3-bromo-5-(2-chlorophenyl)pyrazolo[1,5-a]pyrimidin-7-ylamino]methyl}piperidine-1-carboxylic acid amide (53.7 mg, 86%): FABMS: m/z 463.1 (MH+); HRFABMS: m/z 463.0647 (MH+). Calcd. for C19H21N6OBrCl: m/z 463.0649; δH (d6-DMSO) 1.09 (2H, m, CH2), 1.63 (2H, m, CH2), 1.87 (1H, m, CH), 2.60 (2H, m, CH2), 3.53 (2H, bm, CONH2), 3.91 (2H, d, CH2), 6.52 (1H, s, H6), 7.50 (2H, m, Ar—H), 7.62 (2H, m, Ar—H), 8.33 (1H, s, H2) and 8.52 ppm (1H, m, NH); δC (d6-DMSO) CH2: 30.1, 30.1, 44.2, 44.2, 47.7; CH: 36.4, 88.2, 128.1, 130.7, 131.4, 132.1, 147.9; C: 82.1, 132.1, 139.4, 145.7, 147.9, 158.1, 158.8.

Provenance & Evidence