Synthesis and Absolute Structure Determination of Camphanoate Derivatives of Five Bicyclo[3.1.0]hexane Compounds
作者:A. Krief、T. Ollevier、D. Swinnen、B. Norberg、G. Baudoux、G. Evrard
DOI:10.1107/s0108270197013929
日期:1998.3.15
The relative and absolute stereochemistry of five compounds, (1R,2S,4R,5S)-exo-2-acetoxy-3,3-dimethylbicyclo[3.1.0]hexan-exo-4-yl camphanoate, C20H28O6, (I), (1R,2S,4R,5S,6R)-exa-2-acetoxy-3,3,exo-6-trimethylbicyclo[3.1.0]hexan-exo-4-yl camphanoate, C21H30O6, (II), (1R,2S,4R,5S, 6R)-exo-2-acetoxy-3,3,exo-6-trimethylbicyclo[3.1.0]hexan-exo-4-yl camphanoate, C21H30O6, (III), (1S,2S,4R,5R,6S)-exo-2-acetoxy-endo-6-(3-butenyl)-3,3,exo-6-trimethylbicyclo[3.1.0]hexan-exo-4-yl camphanoate, C25H36O6, (IV), and (1S,2S,4R,5R,6S)endo-2-acetoxy-3,3,exo-6-trimethylbicyclo [3.1.0]hexan-endo-4-yl camphanoate, C21H30O6, (V), (camphanoate is 4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxylate) have been determined and the conformation of the five-membered ring of each one is discussed. These compounds were synthesized by an enantioselective esterase-catalysed hydrolysis followed by acylation with camphanoyl chloride.