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A 6,(17)-epoxylathyrol diterpenoid((2S*3S*4R*5R*6S*9S*11S*15R*)-5,15-diacetoxy-3-phenylacetoxy-14-oxolathyra-6(17),(12E)-diene-6(17)-epoxide) was isolated from the seeds of Euhporbia lathyris L.Its configuration was puzzled because of the incomplete X-ray results reported before.In this work,the atom connectivity and configuration were confirmed by single-crystal X-ray diffraction together with ESI-MS,1H-,and 13C-NMR spectroscopy.The compound crystallizes in monoclinic,space group P21 with a = 11.386(1),b = 8.2839(7),c = 17.192(2) ,β = 108.305(2)°,Z = 2,V = 1539.5(2) 3,C32H40O8,Mr = 552.64,Dc = 1.192 g/m3,F(000) = 592,μ(MoKα) = 0.085 mm-1,T = 293(2) K,the final R = 0.0398 and wR = 0.0950 for 2057 observed reflections with I > 2σ(I).The molecule shows a tricyclic terpenoid skeleton,consisting of fused five-,eleven-and three-membered rings.The configuration at C(5) is R* and that at C(6) S*.
(17) -epoxylathyrol diterpenoid ((2S * 3S * 4R * 5R * 6S * 9S * 11S * 15R *) - 5,15-diacetoxy-3-phenylacetoxy-14-oxolathyra- ) -diene-6 (17) -epoxide) was isolated from the seeds of Euhporbia lathyris L.Its configuration was puzzled because of the incomplete X-ray results reported before In this work, the atom connectivity and configuration were confirmed by single- crystal X-ray diffraction with ESI-MS, 1H-, and 13C-NMR spectroscopy. The compound crystallizes in monoclinic, space group P21 with a = 11.386 (1), b = 8.2839 (7), c = (, Β = 108.305 (2) °, Z = 2, V = 1539.5 (2) 3, C32H40O8, Mr = 552.64, Dc = 1.192 g / -1, T = 293 (2) K, the final R = 0.0398 and wR = 0.0950 for 2057 observed reflections with I> 2σ (I). The molecule shows a tricyclic terpenoid skeleton, consisting of fused five-, eleven-and three -membered rings. The configuration at C (5) is R * and that at C (6) S *.