期刊
TETRAHEDRON LETTERS
卷 53, 期 16, 页码 2103-2106出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.02.044
关键词
Marine red algae; Symphyocladia latiuscula; Bromophenols; Natural products chemistry
资金
- Fundamental Research Funds for the Central Universities [2010ZY18, 2011YXL025]
- Research Fund for the Doctoral Program of Higher Education of China [200804911002]
- National Natural Science Foundation of China [30901849]
- Science and Technology Planning Project of Zhejiang Province, China [2009C33004]
- Institute for Molecular Bioscience, The University of Queensland
- Australian Research Council [LP0989954]
- Australian Research Council [LP0989954] Funding Source: Australian Research Council
Chemical analysis of a Chinese collection of the marine red alga Symphyocladia latiuscula yielded five unprecedented bromophenol-aconitic acid adducts, symphyocladins A-E, together with a new example of a bromophenol-pyroglutamic acid adduct, symphyocladin F, a new example of a bromophenol-urea adduct, symphyocladin G, and the known methyl ester of cis-aconitic acid. The structures were assigned on the basis of detailed spectroscopic analysis, and were consistent with a plausible biosynthetic pathway linking these bromophenol natural products with a putative quinone methide intermediate. Symphyocladins A/B and C/D were isolated as inseparable 1:1 mixtures of E/Z isomers. A plausible mechanism for their facile equilibration during handling and storage is presented. The bromophenol-urea exhibits antifungal activity (MIC 10 mu g/mL) against Candida albicans. (C) 2012 Elsevier Ltd. All rights reserved.
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