Synthesis of Partially Modified Retro and Retroinverso ψ[NHCH(CF<sub>3</sub>)]-Peptides
作者:Alessandro Volonterio、Pierfrancesco Bravo、Matteo Zanda
DOI:10.1021/ol005876p
日期:2000.6.1
Asymmetric conjugate additions of chiral alpha-amino esters to chiral 4-CF3 Michael-acceptors were exploited to prepare a small library of enantiomerically pure partially modified retropeptides having a psi[NHCH(CF3)] unit as a possible mimic of the classical psi(NHCO) retropeptide unit. Yields were nearly quantitative, and the stereoselectivity, which is controlled mainly by the nitrogen nucleophile, was progressively higher with increasing the steric bulk of the alpha-amino ester side-chain R-1.