Diisopropylethylamine → HCID 21068458, compound

Participants

Reaction Conditions

Reaction Steps

3-Bromo-7-chloro-5-(2-chlorophenyl)pyrazolo[1,5-a]pyrimidine (300 mg, 0.875 mmoles) (prepared as described in Preparative Example 129) was dissolved in anhydrous 1,4-dioxane (6.8 mL). 4-(aminomethyl)piperidine-1-carboxylic acid tert-butyl ester (225 mg, 1.05 mmoles) and diisopropyl ethylamine (0.3055 mL, 1.75 mmoles) were added and the mixture was heated at 75° C. for 24 h. The solution was evaporated to dryness and the residue was chromatographed on a silica gel column (15×5 cm) using dichloromethane as the eluant to give 4-{[3-bromo-5-(2-chlorophenyl)pyrazolo[1,5-a]pyrimidin-7-ylamino]methyl}piperidine-1-carboxylic acid tert-butyl ester (461.2 mg, 100%): FABMS: m/z 520.1 (MH+); HRFABMS: m/z 520.1111 (MH+). Calcd. for C23H28N5O2BrCl: m/z 520.1115; δH (CDCl3) 1.30 (2H, m, CH2), 1.51 (9H, s, —COOC(CH3)3), 1.85 (2H, d, CH2), 1.95 (1H, m, CH), 2.76 (2H, m, CH2), 3.40 (2H, m, CH2), 6.37 (1H, s, H6), 6.55 (1H, m, NH), 7.42 (2H, m, Ar—H), 7.52 (1H, m, Ar—H), 7.76 (1H, m, Ar—H) and 8.07 ppm (1H, s, H2); δC (CDCl3) CH3: 28.5, 28.5, 28.5; CH2: 29.1, 29.1, 43.5, 43.5, 47.9; CH: 36.3, 87.5, 127.2, 130.2, 130.3, 131.6, 143.9; C: 79.7, 83.3, 132.1, 138.6, 145.4, 146.3, 154.7, 158.1.

Provenance & Evidence