Synthesis of mono- and dihydroxy-substituted 2-aminocyclooctanecarboxylic acid enantiomers
作者:Márta Palkó、Gabriella Benedek、Enikő Forró、Edit Wéber、Mikko Hänninen、Reijo Sillanpää、Ferenc Fülöp
DOI:10.1016/j.tetasy.2010.05.003
日期:2010.4
(1R,2S,6R)-2-Amino-6-hydroxycyclooctanecarboxylic acid (-)-10 was synthesized from (1R,2S)-2-aminocyclooct-5-enecarboxylic acid (+)-2 via an iodolactone intermediate, while (1R,2S,3R,4S)-2-amino-5,6-dihydroxycyclooctanecarboxylic acid (-)-12 was prepared by using the OsO4-catalysed oxidation of Boc-protected amino ester (-)-5. The stereochemistry and relative configurations of the synthesized compounds were determined by 1D and 2D NMR spectroscopy (based on 2D NOE cross-peaks and (3)J(H,H) coupling constants) and X-ray crystallography. (C) 2010 Elsevier Ltd. All rights reserved.
(1R,2S,6R)-2-氨基-6-羟基环辛烷羧酸 (-)-10 是从 (1R,2S)-2-氨基环辛-5-烯羧酸 (+)-2 通过碘代的乳酸酯中间体合成的,而 (1R,2S,3R,4S)-2-氨基-5,6-二羟基环辛烷羧酸 (-)-12 则是通过使用 Boc 保护的氨基酸酯 (-)-5 的 OsO4 催化的氧化制备的。所合成化合物的立体化学和相对构型通过 1D 和 2D 核磁共振光谱(基于 2D NOE 交叉峰和 (3)J(H,H) 耦合常数)以及 X 射线晶体学测定。版权属于 (C) 2010 Elsevier Ltd.,所有权利保留。