Solution/solid-phase synthesis of partially modified retro- ψ [NHCH(CF 3 )]-peptidyl hydroxamates
作者:Alessandro Volonterio、Pierfrancesco Bravo、Matteo Zanda
DOI:10.1016/s0040-4039(01)00375-6
日期:2001.4
The synthesis of a novel family of partially-modified (PM) retropeptidyl hydroxamates incorporating a [CH(CF3)CH2CO] unit as a surrogate of the conventional malonyl group, has been accomplished both in solution and in solid-phase. The key step is the Michael-type N-addition of free or polymer bound alpha -amino hydroxamates to 3-(E-enoyl)-1,3-oxazolidin-2-ones, which takes place very effectively, although with low stereocontrol. A number of tri- and tetra-peptidyl hydroxamates were obtained either in diastereomerically pure form (by solution-phase synthesist after chromatographic purification), or as mixtures of two epimers in very good chemical purity (by solid-phase, after release from the resin), demonstrating that this method is suitable for preparing combinatorial libraries of PM retro-psi [NHCH(CF3)]-peptidyl hydroxamates for screening as metalloprotease inhibitors. (C) 2001 Elsevier Science Ltd. All rights reserved.