Acetic Acid → HCID 11153699, compound

Participants

Reaction Steps

To a round bottom flask was added urea 27 (100 mg, 0.29 mmol, 1.0 eq.), triethyl orthoformate (0.16 mL, 0.93 mmol, 6.4 eq.), sodium azide (25.0 mg, 0.36 mmol, 1.25 eq.), and acetic acid (0.26 ml, 4.64 mmol, 16.0 eq.). The reaction mixture was stirred at RT for 10 min. before heating to 75° C. for 1 h. The reaction was cooled to RT, and water (0.2 mL), 6N HCl (0.16 mL), and 25% aq. NaNO2 (0.064 mL). The mixture was then extracted with EtOAc, washed with brine and dried with Na2SO4. Concentration via rotary evaporation followed by silica gel column chromatography with 60:40 EtOAc: Hexanes afforded urea 28 as a yellow solid (7.5 mg, 6% yield). LC/MSD (HP Series 1100 MSD) MS (ES+) m/z 397.0 (M+H)+1 1H-NMR, Varian 400 MHz (DMSO-d6) δ 10.40 (s, 1H), 9.24 (s, 1H), 8.30 (d, 1H), 7.82 (s, 1H), 7.79 (d, 1H), 7.62-7.42 (m, 4H), 7.10 (t, 1H), 4.40 (s, 2H) ppm.

Provenance & Evidence