反应详情

1-[N-[(S)-3-(Benzoylamino)-2-oxo-4-phenylbutyl]-L-alanyl]-L-proline, 1,1-dimethylethyl ester (740 mg., 1.46 mmole) is dissolved in a solution of hydrogen chloride in acetic acid (1.5N, 10 ml.) and kept at room temperature for 30 minutes. It is then concentrated, taken into water, filtered and lyophilized to obtain 600 mg. of 1-[N-(S)-3-(benzoylamino)-2-oxo-4-phenylbutyl]-L-alanyl]-L-proline, monohydrochloride; m.p. 83°-163°; [α]D25 =-109° (c=1.04, methanol). Rf 0.6 (silica gel; butanol/acetic acid/water, 4:1:1).

1. concentrationIt is then concentrated
2. filtrationfiltered
3. customto obtain 600 mg