Backbone Amide Linker (BAL) Strategy for <i>N</i><i><sup>α</sup></i>-9-Fluorenylmethoxycarbonyl (Fmoc) Solid-Phase Synthesis of Unprotected Peptide <i>p</i>-Nitroanilides and Thioesters<sup>1</sup>
作者:Jordi Alsina、T. Scott Yokum、Fernando Albericio、George Barany
DOI:10.1021/jo990629o
日期:1999.11.1
novel and general backbone amide linker (BAL) strategy has been devised for preparation of C-terminal modified peptides containing hindered, unreactive, and/or sensitive moieties, in concert with N(alpha)()-9-fluorenylmethoxycarbonyl (Fmoc) solid-phase synthesis protocols. This strategy comprises (i) start of peptide synthesis by anchoring the penultimate residue, with its carboxyl group orthogonally protected
已经设计出一种新颖且通用的主链酰胺接头(BAL)策略,与N(α)()-9-芴基甲氧基羰基(Fmoc)固体一起制备含有受阻,无反应和/或敏感部分的C末端修饰肽相合成协议。该策略包括(i)通过将倒数第二个残基(其羧基被正交保护)通过主链氮锚定来开始肽合成,(ii)以标准方案在C-> N方向上连续进行肽链延长,(iii )选择性正交去除羧基保护基团;(iv)羧基侧基固相活化并与所需的C端残基偶联;(v)最终裂解/脱保护以将游离肽产物释放到溶液中。为了说明这种方法,几种模型肽对硝基苯胺和硫酯已以极高的收率和纯度制备,且消旋作用最小。这样的化合物很难通过标准的Fmoc化学方法制备,包括最初设想的BAL策略。