A novel linker possessing selenocyanate and masked carboxylic acid was developed for the solid-phase synthesis of dehydropeptides. This linker was used to demonstrate the synthesis of the model compound of RGD-conjugated dehydropeptide.
Solid-Phase Total Synthesis and Structure Proof of Callipeltin B
作者:Ravi Krishnamoorthy、Leslie D. Vazquez-Serrano、Jeffrey A. Turk、Jennifer A. Kowalski、Alan G. Benson、Nneka T. Breaux、Mark A. Lipton
DOI:10.1021/ja0666250
日期:2006.12.1
The cytotoxic, cyclic heptadepsipeptide, natural product callipeltin B was synthesized on a solid-phase support in 15% overall yield. Comparison of the 1H NMR spectra of three synthetic isomers with those of callipeltin B confirmed the configurational reassignment of its threonine residues as d-allothreonine and the assignment of the configuration of its beta-methoxytyrosine residue as (2R,3R).
细胞毒性、环状七肽、天然产物 callipeltin B 在固相载体上合成,总产率为 15%。三种合成异构体的 1H NMR 谱与 callipeltin B 的 1H NMR 谱的比较证实其苏氨酸残基的构型重新分配为 d-别苏氨酸,并将其 β-甲氧基酪氨酸残基的构型分配为 (2R,3R)。