76400-21-0 → HCID 18597444, compound

Participants

Reaction Steps

In the manner described in Examples 3, 5 and 6, 2-oxo-4-(4-chlorophenyl)butyric acid and N-[S-(2-benzyloxycarbonylaminoethyl)-L-homocysteinyl]-L-proline were condensed to afford N-[S-(2-benzyloxycarbonylaminoethyl)-N-{1-carboxy-3-(4-chlorophenyl)propyl}-L-homocysteinyl]-L-proline. This reaction was followed by the removal of the carbobenzoxy group with 30-32% HBr in glacial acetic acid to give N-[S-(2-aminoethyl)-N-{1-carboxy-3-(4-chlorophenyl)propyl}-L-homocysteinyl]-L-proline in 67% yield; a white solid on freeze drying; ms (trimethylsilyl): 672 (M+3TMS-15), 600 (M+2TMS-15), 570 (M+2TMS-CO2H), 498 (M+1TMS-CO2H).

Provenance & Evidence