Syntheses of Four Enantiomers of 2,3-Diendo- and 3-Endo-aminobicyclo[2.2.2]oct-5-ene-2-exo-carboxylic Acid and Their Saturated Analogues
作者:Márta Palkó、Mikko Hänninen、Reijo Sillanpää、Ferenc Fülöp
DOI:10.3390/molecules181215080
日期:——
((±)-1) was resolved with O,O'-dibenzoyltartaric acid via diastereomeric salt formation. The efficient synthesis of the enantiomers of 2,3-diendo-3-aminobicyclo[2.2.2]oct-5-ene-2-carboxylic acid ((+)-7 and (-)-7), 3-endo-aminobicyclo[2.2.2]oct-5-ene-2-exo-carboxylic acid ((+)-5 and (-)-5), cis- and trans-3-aminobicyclo[2.2.2]octane-2-carboxylicacid ((+)-6, (-)-6, (+)-8 and (-)-8) was achieved via
乙基 2,3-diendo-3-aminobicyclo[2.2.2]oct-5-ene-2-carboxylate ((±)-1) 用 O,O'-二苯甲酰基酒石酸通过非对映体盐形成进行拆分。2,3-diendo-3-aminobicyclo[2.2.2]oct-5-ene-2-carb acid ((+)-7 and (-)-7), 3-endo-aminobicyclo的对映体的高效合成[2.2.2]oct-5-ene-2-exo-羧酸 ((+)-5 和 (-)-5), cis- and trans-3-aminobicyclo[2.2.2]octane-2-羧酸((+)-6、(-)-6、(+)-8和(-)-8)通过相应酯(-)-1和(+)-1的异构化、氢化和水解获得。合成化合物的立体化学和相对构型由 NMR 光谱(基于 3J(H,H) 耦合常数)和 X 射线晶体学确定。