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Structure elucidation and NMR assignments for two amide alkaloids from a Mangrove endophytic Fungus (No. ZZF-22)

✍ Scribed by Yiguang Chen; Changlun Shao; Zhongjing Huang; Ying Zhang; Xiaoling Cai; Zhigang She; Shining Zhou; Yongcheng Lin

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
83 KB
Volume
47
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The structure elucidations and complete ^1^H and ^13^C NMR assignments are reported for two new natural products: 3‐benzylidene‐8,8a‐dihydroxy‐2‐methyl‐hexahydro‐pyrrolo[1,2‐a]pyrazine‐1,4‐dione(1) and 4‐hydroxy‐6‐(hydroxy‐phenyl‐methyl)‐N‐(3‐methyl‐butyryl)‐nicotinamide (2). Both of these secondary metabolites were isolated from the fermentation medium of a Mangrove endophytic fungus. High resolution electron impact mass spectrometry (HREIMS), FT‐IR Spectroscopy and NMR experiments including gCOSY, gHMQC, gHMBC and NOE were used for determination of the structures and assignments of the amide alkaloids. Copyright © 2008 John Wiley & Sons, Ltd.

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