Hydrochloric Acid → HCID 49764671, compound

Participants

Reaction Steps

A solution of sodium nitrite (0.033 g, 0.478 mmol) in water (2.171 mL) was added to an ice bath chilled solution of Example 45H (0.14 g, 0.434 mmol) in hypophosphorous acid, solution in water (9.03 mL, 87 mmol, 9.63 M) and HCl (2.140 mL, 26.1 mmol, 12.2 M). A sample was taken out after 10 minutes, quenched with 1 M NaOH (aqueous), and the reaction was determined to be complete by LC/MS. The reaction mixture was allowed to reach room temperature and was poured into 100 mL 1 M NaOH (aqueous). Additional 1 M NaOH (aqueous) was added until the pH=14. The product was extracted with dichloromethane three times, dried over sodium sulfate, and the solvent was evaporated. The residue was then purified by reverse phase HPLC to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ ppm 10.03 (s, 1H), 8.19 (t, J=5.8, 1H), 7.61-7.50 (m, 5H), 7.50-7.39 (m, 2H), 7.11 (t, J=7.3, 1H), 7.04 (d, J=7.9, 1H), 4.47 (s, 2H), 3.37-3.10 (m, 6H), 3.02 (dd, J=6.5, 14.9, 1H); MS (ESI+) m/z 308.0 (M+H)+.

Provenance & Evidence