(+)-ovafolinin B

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物 - 芳基四氢萘木脂素
• 英文名称: (+)-ovafolinin B
• 英文别名: ovafolinin B；(1R,10R,18R)-18-(hydroxymethyl)-3,5,14,16-tetramethoxy-8-oxatetracyclo[8.7.1.02,7.012,17]octadeca-2,4,6,12,14,16-hexaene-4,15-diol
• 化学式: C₂₂H₂₆O₈
• 分子量: 418.444
• InChiKey: VCZWWJGHKZTTAS-NVGCLXPQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  30
• 可旋转键数：
  5
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  107
• 氢给体数：
  3
• 氢受体数：
  8

上下游信息

• 上游原料

  中文名称	英文名称	CAS号	化学式	分子量
  ——	(2R,3R,4S,5S,6R)-2-[[(1R,10R,18R)-4,15-dihydroxy-3,5,14,16-tetramethoxy-8-oxatetracyclo[8.7.1.02,7.012,17]octadeca-2,4,6,12,14,16-hexaen-18-yl]methoxy]-6-(hydroxymethyl)oxane-3,4,5-triol	1428903-98-3	C28H36O13	580.586

反应信息

• 作为产物：
  描述：

  (2R,3R,4S,5S,6R)-2-[[(1R,10R,18R)-4,15-dihydroxy-3,5,14,16-tetramethoxy-8-oxatetracyclo[8.7.1.02,7.012,17]octadeca-2,4,6,12,14,16-hexaen-18-yl]methoxy]-6-(hydroxymethyl)oxane-3,4,5-triol 在 盐酸 、 水 作用下， 以 甲醇 为溶剂， 反应 0.5h， 生成 葡萄糖 、 (+)-ovafolinin B
  参考文献：
  名称：

  Antioxidant Lignans and Chromone Glycosides from Eurya japonica

  摘要：

  Four new 8,8',7,2'-lignans, (+)-ovafolinin B-9'-O-beta-D-glucopyranoside (1), (-)-ovafolinin B-9'-O-beta-D-glucopyranoside (2), (+)-ovafolinin E-9'-O-beta-D-glucopyranoside (3), and (-)-ovafolinin E-9'-0-13-o-glucopyranoside (4), two neolignans, eusiderin N (5) and (7S,8R)-3,5,5'-trimethoxy4',7-epoxy-8,3'-neolignan-9,9'-diol-4-O-beta-D-xylopyranoside (6), and two new chromone glycosides, 5,7-dihydroxy-4Hchromen-4-one-3-O-beta-D-glucopyranoside (7) and 5,7-dihydroicy-4H-chromen-4-one-3-0-fl-o-xylopyranoside (8), together with 25 known compounds, were isolated from the stems of Eurya japonica. Structural elucidation of compounds 1-8 was established by spectroscopic methods, especially 2D NMR techniques, electronic circular dichroism data, and comparison with reported data. The isolates were evaluated for antioxidant and anti-NO production activities. Compounds 1, 2, 12-20, and 29 (ED50 23.40 mu M for 1) demonstrated potent antioxidant activity compared to the positive control a-tocopherol (ED50 27.21 yM). On the other hand, compounds 1, 2, 7-9, 12-20, and 32 showed only weak anti-NO production activity when compared to the positive control quercetin.

  DOI：

  10.1021/np3007638

文献信息

• Total Synthesis of Ovafolinins A and B: Unique Polycyclic Benzoxepin Lignans through a Cascade Cyclization
  作者：Samuel J. Davidson、David Barker

  DOI：10.1002/anie.201705575

  日期：2017.8.1

  Ovafolinins A and B, isolated from Lyonia ovalifolia var. elliptica, are lignans that contain a unique bridged structure containing a penta‐ and tetracyclic benzoxepin and an aryl tetralin. We report the first total synthesis of these natural products in which an acyl‐Claisen rearrangement was initially utilized to construct the lignan backbone with correct relative stereochemistry. Judicious use of

  Ovafolinins A和B，从分离的珍珠花变种 椭圆体是木脂素，其包含独特的桥联结构，该结构包含五环和四环苯并氧杂庚酸酯和芳基四氢化萘。我们报道了这些天然产物的首次全合成，其中最初使用酰基-克莱森重排构建具有正确相对立体化学的木脂素骨架。明智地使用大体积的保护基团将反应性部分置于正确的方向，从而导致级联反应，从而在一个步骤中由线性前体形成桥连的苯并二甲苯基/芳基四氢萘。对该路线的修改允许（+）-ovafolinins A和B的对映选择性合成，这证实了绝对立体化学，旋光度的比较表明，这些化合物在自然界中以鳞状混合物的形式发现。
• Antioxidant Lignans and Chromone Glycosides from <i>Eurya japonica</i>
  作者：Li-Ming Yang Kuo、Li-Jie Zhang、Hung-Tse Huang、Zhi-Hu Lin、Chia-Ching Liaw、Hui-Ling Cheng、Kuo-Hsiung Lee、Susan L. Morris-Natschke、Yao-Haur Kuo、Hsiu-O Ho

  DOI：10.1021/np3007638

  日期：2013.4.26

  Four new 8,8',7,2'-lignans, (+)-ovafolinin B-9'-O-beta-D-glucopyranoside (1), (-)-ovafolinin B-9'-O-beta-D-glucopyranoside (2), (+)-ovafolinin E-9'-O-beta-D-glucopyranoside (3), and (-)-ovafolinin E-9'-0-13-o-glucopyranoside (4), two neolignans, eusiderin N (5) and (7S,8R)-3,5,5'-trimethoxy4',7-epoxy-8,3'-neolignan-9,9'-diol-4-O-beta-D-xylopyranoside (6), and two new chromone glycosides, 5,7-dihydroxy-4Hchromen-4-one-3-O-beta-D-glucopyranoside (7) and 5,7-dihydroicy-4H-chromen-4-one-3-0-fl-o-xylopyranoside (8), together with 25 known compounds, were isolated from the stems of Eurya japonica. Structural elucidation of compounds 1-8 was established by spectroscopic methods, especially 2D NMR techniques, electronic circular dichroism data, and comparison with reported data. The isolates were evaluated for antioxidant and anti-NO production activities. Compounds 1, 2, 12-20, and 29 (ED50 23.40 mu M for 1) demonstrated potent antioxidant activity compared to the positive control a-tocopherol (ED50 27.21 yM). On the other hand, compounds 1, 2, 7-9, 12-20, and 32 showed only weak anti-NO production activity when compared to the positive control quercetin.