1,4-Dioxane hydrochloride → HCID 57947922, compound

Participants

Reaction Steps

To a solution of (S)-tert-butyl 4-(4-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-(5-(3-fluorophenyl)isoxazol-3-ylcarbamoyloxy)pentanoyl)piperazine-1-carboxylate (0.3 g, 0.36 mmol, 1.0 equiv.) in MeOH (2 mL) at 0° C., was added HCl/dioxane (4 N, 0.9 mL, 3.6 mmol, 10 equiv.). The solution was stirred at RT for 1 h. The solvents were removed and the residue was purified on RP-HPLC using a mixture of acetonitrile and H2O with 0.1% TFA. The elute was diluted with EtOAc (10 mL) and then basified with saturated NaHCO3. The organic layer was dried and concentrated to give (S)-2-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-oxo-5-(piperazin-1-yl)pentyl 5-(3-fluorophenyl)isoxazol-3-ylcarbamate (0.18 g, 90%). LRMS (M+H+) m/z 605.1.

Provenance & Evidence