Hydrochloric Acid → HCID 178450972, compound

Participants

Reaction Conditions

Reaction Steps

(R)-4-Amino-5-biphenyl-4-yl-2,2-dimethyl-pentanoic acid ethyl ester (72.1 mg, 221 μmol, 1.0 eq.) was combined with dry butyl alcohol (5 mL) and 4N HCl in dioxane (1 mL) and stirred at 60° C. overnight. The solvent where evaporated and azeotroped with toluene. To this was added a mixture of 3-Hydroxyisoxazole-5-carboxylic acid (28.6 mg, 221 μmol, 1.0 eq.), EDCI (39.2 μL, 1.0 eq.) and HOBt (29.9 mg, 221 μmol, 1.0 eq.) that had been combined in DMF (0.2 mL) and stirred for 5 minutes at room temperature. The resulting mixture was stirred for 30 minutes. The reaction was quenched with AcOH and the product was purified by preparative HPLC and lyophilized to yield the title compound (40 mg, 95% purity). MS m/z [M+H]+ calc'd for C27H32N2O5, 465.23; Found 465.4.

Provenance & Evidence