Ac-[3- and 4-Alkylthioproline31]-CCK4 Analogs: Synthesis and Implications for the CCK-B Receptor-Bound Conformation
作者:Stephen A. Kolodziej、Gregory V. Nikiforovich、Richard Skeean、Marie-Francoise Lignon、Jean Martinez、Garland R. Marshall
DOI:10.1021/jm00001a019
日期:1995.1
analogs containing substitution of Met31 by 3- and 4-(alkylthio)-substituted proline derivatives. To this end we have developed novel synthetic routes to enantiomerically pure N-Boc-4-cis- and -trans-(methylthio)prolines and racemic N-Boc-3-cis and -trans-[(4-methylbenzyl)thio]prolines. The protected mercaptoprolines were incorporated into Ac-CCK4 analogs using SPPS and were alkylated using various electrophiles