Xylocarpins A and B, two new mexicanolides from the seeds of a Chinese mangrove Xylocarpus granatum: NMR investigation in mixture
文献类型：期刊论文
| 作者 | Li, MY ; Wu, J ; Zhang, S ; Xiao, Q ; Li, QX |
| 刊名 | MAGNETIC RESONANCE IN CHEMISTRY
 |
| 出版日期 | 2007 |
| 卷号 | 45期号:8页码:705-709 |
| 关键词 | NMR H-1 NMR C-13 NMR 2D NMR mexicanolide Xylocarpus granatum complete NMR assignments sodium borohydride reduction |
| ISSN号 | 0749-1581 |
| 通讯作者 | wwujun2003@yahoo.com |
| 中文摘要 | Xylocarpins A and B, two new mexicanolides with a tiglate group at C-3, have been identified in the mixture using NMR spectroscopy. Both compounds were isolated in the mixture from the seeds of a Chinese mangrove Xylocarpus granatum. The first complete assignments of H-1 and C-13 NMR data for these mexicanolides were achieved by means of 2D NMR techniques including H-1-H-1 COSY, HSQC, HMBC and NOESY spectra. In order to separate xylocarpins A (1) and B (2) by chemical method, the mixture of two compounds was reduced with sodium borohydride in anhydrous methanol. However, the reduction led to the opening of the delta-lactone ring in xylocarpin B and afforded compound 3 as the main product. The complete NMR assignments of compound 3 were also achieved by means of the above 2D NMR techniques. Moreover, xylocarpin A was easily transformed into xylocarpin B during our normal liquid column chromatography. From this point of view, xylocarpin A was deemed to be the genuine natural product and xylocarpin B might be an artifact. Copyright (c) 2007 John Wiley & Sons, Ltd. |
| 学科主题 | Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy |
| 收录类别 | SCI |
| 原文出处 | JOHN WILEY & SONS LTD |
| WOS记录号 | WOS:000248527100016 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/5224]  |
| 专题 | 南海海洋研究所_广东省海洋药物重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, MY,Wu, J,Zhang, S,et al. Xylocarpins A and B, two new mexicanolides from the seeds of a Chinese mangrove Xylocarpus granatum: NMR investigation in mixture[J]. MAGNETIC RESONANCE IN CHEMISTRY,2007,45(8):705-709. |
| APA | Li, MY,Wu, J,Zhang, S,Xiao, Q,&Li, QX.(2007).Xylocarpins A and B, two new mexicanolides from the seeds of a Chinese mangrove Xylocarpus granatum: NMR investigation in mixture.MAGNETIC RESONANCE IN CHEMISTRY,45(8),705-709. |
| MLA | Li, MY,et al."Xylocarpins A and B, two new mexicanolides from the seeds of a Chinese mangrove Xylocarpus granatum: NMR investigation in mixture".MAGNETIC RESONANCE IN CHEMISTRY 45.8(2007):705-709. |
入库方式： OAI收割
来源：南海海洋研究所
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