Synthesis of Orthogonally Protected (2R,3R,4S)-4-Amino-2,3-dihydroxyheptane-1,7-dioic Acid
作者:Hiroyuki Konno、Yoshinori Tokairin、Kakeru Maita、Sho Takeda
DOI:10.1055/s-0034-1378902
日期:——
(2R, 3R, 4S)-4-Amino-2,3-dihydroxyheptane-1,7-dioic acid, a common component of cyclic depsipeptide homophymines with anti-HIV activity, was synthesized as its orthogonally protected derivative from Fmoc-Glu(t-Bu)-OH in 6 steps. Osmium-catalyzed dihydroxylation of.-amino-Z-alpha, beta-unsaturated esters gave the dihydroxy esters with moderate diastereoselectivity. The stereochemistries of the amino acids were determined by comparison of H-1 NMR spectra.
(2R, 3R, 4S)-4-氨基-2,3-二羟基庚酸-1,7-二甲酸是一种具有抗HIV活性的环状 depsipeptide homophymines的常见成分,本文通过6步合成,将其正交保护衍生物由 Fmoc-Glu(t-Bu)-OH 制得。通过锇催化的-氨基-Z-α,β-不饱和酯的二羟基化反应,得到具有中等非对映选择性的二羟基酯。氨基酸的立体化学通过比较 H-1 NMR �谱图确定。