Hexamethylphosphoramide → HCID 54596503, compound

Participants

Reaction Steps

3-Fluorobenzenethiol (70.49 mg, 46.47 μL, 0.55 mmol) was added to HMPA (1 mL) followed by the addition of sodium hydride (60% dispersion in mineral oil) (24 mg, 0.6 mmol). The reaction mixture was stirred at ambient temperature for 10 minutes then 3-(1H-Benzimidazol-2-yl)-5-bromo-pyrazin-2-amine (80 mg, 0.27 mmol) was added and reaction heated at 110° C. under microwave conditions for 45 minutes. The reaction mixture was cooled to ambient temperature and diluted with EtOAc. The organic layer was washed with water (×2), saturated aqueous NaHCO3 (×1) and brine. (×1), dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 mM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]. The fractions were collected and freeze-dried to give the title compound as a yellow solid (10 mg, 11% Yield). 1H NMR (400.0 MHz, CDCl3) δ 76.95-7.0 (1H, m), 7.03-7.06 (1H, m), 7.1-7.13 (1H, m), 7.3-7.4 (2H, m), 7.50-7.55 (1H, m), 7.8-7.85 (1H, m), 8.22 (1H, s) and 10.2 (1H, br s) ppm; MS (ES+) 338.1.

Provenance & Evidence