Stereoselective Synthesis of <b>β-</b>Methoxytyrosine Derivatives for Identification of the Absolute Configuration of Callipeltin E
作者:Hiroyuki Konno、Sachiyo Aoyama、Kazuto Nosaka、Kenichi Akaji
DOI:10.1055/s-2007-990848
日期:2007.12
Asymmetric syntheses of all diastereoisomers ofp-methoxytyrosine, an unusual amino acid contained in callipeltin A, were accomplished starting from a cinnamyl ester derivative. The stereochemistry of β-methoxytyrosine in callipeltin E was estimated to be 2R,3R by 1 H and 13 C NMR analyses of four diastereoisomeric tripeptides, each containing a β-methoxytyrosine isomer. These results obtained from the synthetic
对甲氧基酪氨酸的所有非对映异构体的不对称合成是从肉桂酯衍生物开始的。通过四种非对映异构三肽的 1 H 和 13 C NMR 分析估计,卡利佩汀 E 中 β-甲氧基酪氨酸的立体化学为 2R、3R,每种三肽均含有 β-甲氧基酪氨酸异构体。从合成肽衍生物获得的这些结果与 D'Auria 通过降解程序获得的结果相同。