Jp. Mazaleyrat et al., SYNTHESIS OF C2-SYMMETRICAL INHIBITORS OF THE HIV-1 PROTEASE, WITH N,N'-SUBSTITUTED ETHYLENEDIAMIDE AND ETHYLENEDIAMINE LINKERS, Bioorganic & medicinal chemistry letters, 4(5), 1994, pp. 653-656
Coupling of Z-(L)-phenylalanine with either ethylenediamine or N,N-dim
ethylethylenediamine, followed by N-deprotection and either direct cou
pling with Z-(L)-valine or amide reduction prior to coupling, gave C2-
symmetric compounds [Z-Val-Phe-N(R)CH2-]2 (R = H, CH3) and [Z-Val-Phe(
PSICH2-N)-N(R)CH2-]2 (R = H, CH3, CH2COOH, CH2CH2OH) which were modera
tely active inhibitors of the HIV-1 protease.