Peptides Constrained by an Aliphatic Linkage between Two C<i><sup>α</sup></i> Sites: Design, Synthesis, and Unexpected Conformational Properties of an <i>i</i>,(<i>i</i><i> + </i>4)-Linked Peptide
作者:Linda M. Alexander McNamara、Martin J. I. Andrews、Frieder Mitzel、Giuliano Siligardi、Alethea B. Tabor
DOI:10.1021/jo015508e
日期:2001.6.1
A novel route for the synthesis of cyclic peptides constrained by an aliphatic bridge between two C(alpha)sites, using a triply orthogonal protecting group strategy, is described. The synthesis of the orthogonally protected bis-amino acid 1, via an enantioselective route utilizing the Schöllkopf and Evans methodologies, is first described. This is then incorporated into a short, alanine-rich peptide
描述了一种使用三重正交保护基策略合成由两个Cα位之间的脂族桥限制的环肽的新途径。首先描述利用Schöllkopf和Evans方法通过对映选择性路线合成正交保护的双氨基酸1。然后使用新颖的三重正交保护基策略将其掺入一个短的,富含丙氨酸的肽13中,从而首先偶联一个氨基酸,然后另一个偶联氨基酸部分,从而在i和i +之间形成脂族桥4个职位。出乎意料的是,所得的受约束肽未采用螺旋构象:相反,