Synthesis of N-urethane protected amino alkyl (S-methyl)-isothiouronium compounds and carbodiimide tethered peptidomimetics: an application for guanidino and substituted guanidino peptidomimetics synthesis
作者:Basavaprabhu Hosamani、N. Narendra、Girish Prabhu、Vommina V. Sureshbabu
DOI:10.1039/c4ra07252a
日期:——
The synthesis of N,N′-disubstituted and N,N′,N′′-trisubstituted guanidine linked peptidomimetic molecules suitably decorated in the peptide backbone has been delineated. Nα-Protected amino acid derived S-methyl isothiouronium derivatives are employed as the key intermediates for the synthesis of guanidinopeptide mimics. Synthesis of a new class of carbodiimide tethered dipeptidomimetics has also been outlined wherein a Staudinger-aza-Wittig type reaction between amino alkyl azide and isothiocyanato esters is employed. Thus obtained carbodiimides have been demonstrated as starting materials for the construction of guanidino peptide mimics as well as an array of trisubstituted guanidine mimetics bearing N-hydroxy, cyano and amino function as third substitutions at the guanidino unit in the backbone.
已阐明了合成N,N′-二取代和N,N′,N′′-三取代的胍基连接肽模仿分子,这些分子在肽骨架中进行了适当的装饰。采用Nα-保护的氨基酸衍生的S-甲基异硫脲盐衍生物作为合成胍基肽模仿物的关键中间体。还概述了一类新型的碳二亚胺连接的二肽模仿物的合成,其中采用氨基烷基叠氮化物与异硫氰酸酯之间的斯陶丁格-阿扎-维蒂格反应。因此获得的碳二亚胺已被证明是构建胍基肽模仿物的起始材料,以及一系列具有N-羟基、氰基和氨基作为胍基单元中第三取代基的三取代胍基模仿物。