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.