Novel peptide isosteres that were designed to inhibit the binding of the HIV surface glycoprotein (gp120) to the T cell surface glycoprotein CD4
Abstract
The cis- and trans-isomers of (2S)-2-[3′(RS)-3′-benzyl-3′-benzyloxycarbonylprop-1′-enyl]-N-methoxycarbonylcarbonylpyrrolidines have been prepared from a Wittig reaction between (S)-N-Boc-prolinal and the phosphorus ylide from (2RS)-3-iodo-2-benzyl-1-triisopropylsilyloxypropane. In addition, (2S)-N-methoxycarbonylcarbonyl-2-[(3′RS)-1-oxo-3′-benzyl-3′-benzyloxycarbonylpropyl]pyrrolidine was prepared from the cis-alkene produced in the Wittig reaction. These were intended as peptide isosteres of the known inhibitors of HIV-lymphocyte binding N-methoxycarbonylcarbonylprolylphenylalanyl benzyl esters, but did not possess such activity.