available as buildingblocks for solid-phase peptide synthesis. In the present work a convenient, inexpensive route to multiple-charged amino acid buildingblocks with varying degree of hydrophobicity was developed. A versatile solid-phase protocol leading to selectively protected amino alcohol intermediates was followed by oxidation to yield the desired di- or polycationic amino acid buildingblocks in gram-scale
Synthesis of novel, orthogonally protected multifunctional amino acids
作者:Siri Ram Chhabra、Anju Mahajan、Weng C. Chan
DOI:10.1016/s0040-4039(99)00909-0
日期:1999.6
Two synthetic strategies for the generation of differentially protected, chiral tri-amino acids have been developed. The first strategy is based on the reductive amination of a serine-derived oxazolidine aldehyde with mono N-protected ethylenediamine. The second approach involves reductive alkylation of an asparagine-derived N-protected diaminopropionate with an N-protected glycinal. The newly generated secondary amine functionality is derivatised to furnish structurally diverse molecules, (C) 1999 Elsevier Science Ltd. All rights reserved.