Nine 3-aryl-5r-aryl-6t-carbethoxycyclohex-2-enones 2a-2i have been synthesized. For all these compounds, (1)H and (13)C NMR spectra have been recorded. For two compounds, 2D spectra have been recorded. The spectral data suggest that these compounds adopt sofa conformation in solution with H-5, H-6 and H-4t occupying axial-like positions and H-4c occupying equatorial-like positions. In 3-phenyl-5r-
已经合成了九个3-芳基-5r-芳基-6t-乙氧基环己基-2-烯酮2a-2i。对于所有这些化合物,已记录了(1)H和(13)C NMR光谱。对于两种化合物,已记录了2D光谱。光谱数据表明,这些化合物在溶液中采用沙发构象,其中H-5,H-6和H-4t占据轴向样位,H-4c占据赤道样位置。在3-苯基-5r-(邻
氯苯基)-6t-甲乙氧基环己基-2-烯酮(2b)中,邻
氯苯基的取向使得
氯原子在H-4c和H-5之间。仅在H-4t上观察到H-2的烯丙基偶联。已经获得了关于1,3-双轴质子和1,3-轴向赤道质子之间的四键耦合的证据。