Enantioselective Synthesis of <i>N</i><sup>α</sup>-Fmoc Protected (2<i>S</i>,3<i>R</i>)-3-Phenylpipecolic Acid. A Constrained Phenylalanine Analogue Suitably Protected for Solid-Phase Peptide Synthesis
作者:Ding-Guo Liu、Yang Gao、Xiangzhu Wang、James A. Kelley、Terrence R. Burke
DOI:10.1021/jo010124+
日期:2002.3.1
Reported herein is the first enantioselective preparation of (2S,3R)-3-phenylpipecolic acid as a conformationally constrained phenylalanine analogue bearing N(alpha)-protection suitable for solid-phase peptide synthesis. Stereochemistries at both the 2- and 3-positions are derived inductively from a single chiral center provided by the commercially available Evans chiral auxiliary, (4S)-4-benzyl-1
本文报道的是(2S,3R)-3-苯基哌酸的第一种对映选择性制剂,其为具有固相肽合成的带有Nα-保护的构象约束的苯丙氨酸类似物。在2-位和3-位的立体化学均由市售的Evans手性助剂(4S)-4-苄基-1,3-恶唑烷基-2-一提供的单一手性中心感应衍生。通过限制phi和chi(1)扭转角,这种新颖的氨基酸类似物可以用作诱导含苯丙氨酸的肽中定义的几何结构的有用工具。