| THE CRYSTAL STRUCTURES OF ALKALOIDS FROM KOPSIA OFFICINALIS |
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| 摘 要： | <正> Kopsamine(I): Mr=456.50, orthorhombic, P212121, a=ll.245(3), b=12.547(2), c=15.043(3)A, Z=4, Dc=1.429g.cm-3, V=2122.5A3, final R=0.041 for 2008 observed reflections.N-carbomethoxy-11-methoxy-12-hydroxy-kopsinaline(Ⅱ): Mr=458.52, mono-clinic, P21,a=8.424(2), b=13.037(1), c=9.883(1)A,β=90.14(2)°, Z=2, Dc= 1.403g·cm-3, V=1085.4 A3, final R=0.039 for 1687 observed reflections.In the structures: The rings A,B and E(I) take envelop conformations. The ring C takes chair conformation and the ring D boat conformation. There are intramolecular hydrogen bonds 0(5)-HO(5)...0(1) both in molecule(I) and molecule(Ⅱ), which formed the distorted seven-membered ring with atoms C(22), N(1), C(2), and C(18).
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THE CRYSTAL STRUCTURES OF ALKALOIDS FROM KOPSIA OFFICINALIS |
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| Abstract: | Kopsamine(I): Mr=456.50, orthorhombic, P212121, a=ll.245(3), b=12.547(2), c=15.043(3)A, Z=4, Dc=1.429g.cm-3, V=2122.5A3, final R=0.041 for 2008 observed reflections.N-carbomethoxy-11-methoxy-12-hydroxy-kopsinaline(Ⅱ): Mr=458.52, mono-clinic, P21,a=8.424(2), b=13.037(1), c=9.883(1)A,β=90.14(2)°, Z=2, Dc= 1.403g·cm-3, V=1085.4 A3, final R=0.039 for 1687 observed reflections.In the structures: The rings A,B and E(I) take envelop conformations. The ring C takes chair conformation and the ring D boat conformation. There are intramolecular hydrogen bonds 0(5)-HO(5)...0(1) both in molecule(I) and molecule(Ⅱ), which formed the distorted seven-membered ring with atoms C(22), N(1), C(2), and C(18). |
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