Isolation of montecristin, a key metabolite in biogenesis of acetogenins from Annona muricata and its structure elucidation by using tandem mass spectrometry

被引:22
作者
Gleye, C
Laurens, A
Hocquemiller, R
Cave, A
Laprevote, O
Serani, L
机构
[1] UNIV PARIS 11,FAC PHARM,URA 1843 CNRS BIOCIS,LAB PHARMACOGNOSIE,F-92296 CHATENAYMALABRY,FRANCE
[2] CNRS,INST CHIM SUBST NAT,LAB SPECTROMETRIE MASSE,F-91198 GIF SUR YVETTE,FRANCE
关键词
D O I
10.1021/jo960901j
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
During the course of our continuing search for acetogenins from Annonaceae, a new metabolite, montecristin, possibly involved in the biogenesis of acetogenins, was isolated from the roots of Annona muricata. Its structure was elucidated on the basis of UV, IR, H-1 and C-13 NMR, and mass spectrometry. The identification of the main stuctural features of montecristin (1) was obtained from the NMR spectra whereas their locations on the alkyl chain were evidenced by using mass spectrometry. The attribution of each carbon and location of substituents on the alkyl chain of this fatty acid gamma-lactone was evidenced by using tandem mass spectrometry (MS/MS) and high-energy collisional activation of[M + Li](+) lithium complexes. Finally, the structure determination of montecristin was strengthened by epoxidation and transformation leading to a known adjacent bis-tetrahydrofuran acetogenin.
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收藏
页码:510 / 513
页数:4
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