从Pleurostylia opposita(Wall)Alston(Celastraceae)的茎皮中分离出的四个新的氧化的羽扇豆已被证明为lupa-5,20(29)-dien-3-one(2),6β,20-dihydroxylupan-3-一(5),3β,6β-dihydroxylup-20(29)-ene(6)和6β,28-dihydroxylup-20(29)-en-3-one(8)。这些化合物的结构是在光谱学(1 H nmr和质谱)和化学证据的基础上确定的。在6β-羟基紫杉烷衍生物的1 H nmr光谱中对三个甲基信号的去屏蔽作用归因于相关甲基和6β-羟基之间的1,3-双轴相互作用。
A lupane derivative and the 13C NMR chemical shifts of some lupanols from Pleurostylia opposita
作者:Anura P. Dantanarayana、N.Savitri Kumar、P.Mangala Muthukuda、Mohamed I、M. Wazeer
DOI:10.1016/0031-9422(82)83044-6
日期:1982.1
Abstract A newlupane derivative isolated fromPleurostyliaopposita has been assigned the structure 6,β-hydroxy-lup-20(29)-en-3-one, using spectral evidence and chemical interconversions. The 13C NMR spectral assignments of 20-hydroxy-lupan-3-one, 6β, 20-dihydroxy-lupan-3-one, 6β,28-dihydroxy-lup-20(29)-en-3-one and 20-hydroxy-lupane-3, 6-dione previously isolated from the same plant are also reported
Structures of four new oxygenated lupanes from Pleurostylia opposita(Celastraceae)
作者:Anura P. Dantanarayana、N. Savitri Kumar、M. Uvais S. Sultanbawa、Sinnathamby Balasubramaniam
DOI:10.1039/p19810002717
日期:——
Four new oxygenated lupanes isolated from the stem bark of Pleurostylia opposita(Wall) Alston (Celastraceae) have been shown to be lupa-5,20(29)-dien-3-one (2), 6β,20-dihydroxylupan-3-one (5),3β,6β-dihydroxylup-20(29)-ene (6), and 6β,28-dihydroxylup-20(29)-en-3-one (8). The structures of these compounds were established on the basis of spectroscopic (1H n.m.r. and mass spectral) and chemical evidence
从Pleurostylia opposita(Wall)Alston(Celastraceae)的茎皮中分离出的四个新的氧化的羽扇豆已被证明为lupa-5,20(29)-dien-3-one(2),6β,20-dihydroxylupan-3-一(5),3β,6β-dihydroxylup-20(29)-ene(6)和6β,28-dihydroxylup-20(29)-en-3-one(8)。这些化合物的结构是在光谱学(1 H nmr和质谱)和化学证据的基础上确定的。在6β-羟基紫杉烷衍生物的1 H nmr光谱中对三个甲基信号的去屏蔽作用归因于相关甲基和6β-羟基之间的1,3-双轴相互作用。