Benzoyl chloride → ((2(S)-Benzoylamino-3-methylbutyryl)benzylamino)acetic Acid Ethyl Ester

Participants

Reaction Steps

To a solution of compound 702 (3.45 g, 8.8 mmol) in EtOAc at 0° C. was bubbled in gaseous HCl until saturated. The reaction was warmed to rt and stirred for 3 hr. Nitrogen was bubbled through the reaction to remove excess HCl, followed by concentration in vacuo. The residue suspended in CH2Cl2 (50 mL), treated with DIEA (3.4 mL, 19.5 mmol) followed by benzoyl chloride (1.2 mL, 10.3 mmol) and the reaction allowed to stir overnight. The reaction was concentrated in vacuo and the residue taken up into EtOAc and H2O. The layers were separated and the organic phase washed with sat. aq. NaHCO3, sat. aq. KHSO4, brine, dried over MgSO4, filtered and concentrated in vacuo to provide 3.45 g of compound 703. ##STR82##

Provenance & Evidence