NEW PHYSALINS POSSESSING AN ADDITIONAL CARBON-CARBON BOND FROM PHYSALIS-ALKEKENGI VAR FRANCHETI
NEW PHYSALINS POSSESSING AN ADDITIONAL CARBON-CARBON BOND FROM PHYSALIS-ALKEKENGI VAR FRANCHETI
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DOI：
10.1016/0040-4020(95)00807-k
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发表时间：
1995-11-13
期刊：
影响因子：
2.1
通讯作者：
BUTSUGAN, Y
中科院分区：
文献类型：
--
作者：
MAKINO, B;KAWAI, M;BUTSUGAN, Y
酸浆素 R 和 S 是从 Physalis alkekengi var. 中分离出来的。 francheti 及其结构通过光谱研究分别确定为 15 α-羟基-11 β,15 β-环-15-脱氧浆素 B 和 3 α,5 α-环-6 β-羟基-2,3,5,6-四氢浆素 B。酸浆蛋白 B 的紫外线照射提供了酸浆蛋白 R，并且这种光诱导的 C(11)-C(15) 键形成被证明通过 A 环中的共轭烯酮基团在分子内敏化。
Physalins R and S were isolated from Physalis alkekengi var. francheti and their structures were determined by spectroscopic studies as 15 alpha-hydroxy-11 beta,15 beta-cyclo-15-deoxophysalin B and 3 alpha,5 alpha-cyclo-6 beta-hydroxy-2,3,5,6-tetrahydrophysalin B, respectively. The UV-irradiation of physalin B afforded physalin R, and this photo-induced C(11)-C(15) bond formation was shown to be sensitized intramolecularly by the conjugated enone group in the A ring.