NMR spectral assignments of a new [C-O-C] isoflavone dimer from Andira surinamensis

作者：de Almeida Jose Gustavo L; Silveira Edilberto R; Pessoa Otilia Deusdenia L^*

来源：Magnetic Resonance in Chemistry, 2008, 46(1): 103-106.

DOI：10.1002/mrc.2138

• H-1 NMR
• C-13 NMR
• 2D NMR
• Andira surinamensis
• Leguminosae
• isoflavones

The phytochemical investigation of extracts from the branch wood and branch barks of Andira surinamensis yielded a novel isoflavone dimer, 4'-methoxyisoflavone-(7-0-7")-3"',4"-methylenedioxyisoflavone (surinamensin), along with the triterpene lupeol and the known isoflavones 5,7-dihydroxy-4'-methoxyisoflavone (biochanin A), 5,4'-dihydroxy-7-methoxyisoflavone (prunetin), 7,3'-dihydroxy-4'-methoxyisoflavone (calycosin), and 5,7,3'-trihydroxy-4'-methoxyisoflavone (pratensein). The structure of the new isoflavone was elucidated by 1D and 2D homonuclear and heteronuclear NMR spectroscopy and by comparison with published data for closely related compounds.

• 出版日期2008-1