Enantioselective synthesis and antioxidant activity of 3-(3,4-dihydroxyphenyl)-glyceric acid-Basic monomeric moiety of a biologically active polyether from<i>Symphytum asperum</i>and<i>S. caucasicum</i>
作者:Maia Merlani、Vakhtang Barbakadze、Lela Amiranashvili、Lali Gogilashvili、Elina Yannakopoulou、Kyriakos Papadopoulos、Bezhan Chankvetadze
DOI:10.1002/chir.20823
日期:——
The racemic and enantioselective synthesis of a novel glyceric acid derivative, namely, 2,3‐dihydroxy‐3‐(3,4‐dihydroxyphenyl)‐propionic acid as well as the antioxidant activities is described. The virtually pure enantiomers, (+)‐(2R,3S)‐2,3‐dihydroxy‐3‐(3,4‐dihydroxyphenyl)‐propionic acid and (−)‐(2S,3R)‐2,3‐dihydroxy‐3‐(3,4‐dihydroxyphenyl)‐propionic acid were synthesized for the first time via Sharpless
描述了一种新型甘油酸衍生物(2,3-二羟基-3-(3,4-二羟基苯基)丙酸)的外消旋和对映选择性合成及其抗氧化活性。几乎纯的对映异构体(+)-(2 R,3 S)-2,3-二羟基-3-(3,4-二羟基苯基)丙酸和(-)-(2 S,3 R)-2,使用对映体互补催化剂(DHQD)2 -PHAL和(DHQ)2首次通过反咖啡酸衍生物的Sharpless不对称二羟基化合成了3-二羟基-3-(3,4-二羟基苯基)-丙酸‐PHAL。新型手性甘油酸衍生物的对映体纯度的测定是通过高效液相色谱技术在其烷基化前体阶段进行的。新型甘油酸衍生物显示出对次氯酸盐和N,N - N-二苯基-N-吡啶并-肼基自由基的强抗氧化活性。它们的抗氧化活性比相应的天然聚醚高约40倍,反式咖啡酸本身高3倍。手性,2010年。©2010 Wiley-Liss,Inc.。