Dihydroisocoumarins and phthalide from wood samples infested by fungi |
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| Authors: | Marden A. de Alvarenga Raimundo Braz Fo Otto R. Gottlieb João P. de P. Dias Aderbal F. Magalhães Eva G. Magalhães Gouvan C. de Magalhães Mauro T. Magalhães José G.S. Maia Raquel Marques Anita J. Marsaioli Antônio A.L. Mesquita Anselmo A. de Moraes Alaide B. de Oliveira Geovane G. de Oliveira Gentil Pedreira Sebastião K. Pereira Sonildes L.V. Pinho Celira C. Santos |
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| Affiliation: | 1. Instituto de Química, Universidade de São Paulo, SP Brasil;2. Instituto de Ciências Exatas, Universidade Federal Rural do Rio de Janeiro, Itaguaí, RJ Brasil;3. Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brasil;4. Instituto de Química, Universidade Estadual de Campinas, SP Brasil;6. Centro de Tecnologia Agrícola e Alimentar, Empresa Brasileira de Pesquisa Agropecuária, Rio de Janeiro, RJ Brasil;5. Instituto Nacional de Pesquisas da Amazônia, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Manaus, AM; Brasil |
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| Abstract: | Wood samples, infested by fungi during storage, were shown to contain, besides the known 5-methyl-mellein, additional (3R)-8-hydroxy-3-methyl-3,4-dihydroisocoumarins substituted by 7-methyl, 5-formyl, 5-carboxy, 5-hydroxy, 5-methoxy, 6-methoxy-5-methyl and 6,7-dimethoxy-5-methyl groups, as well as 6-formyl-7-hydroxy-5-methoxy-4-methylphthalide. Several 2-methylchromanones were synthesized in order to show that this class of compounds can be distinguished from 3-methyl-3,4-dihydroisocoumarins by MS. |
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| Keywords: | Fungal metabolites 3-methyl-3,4-dihydroisocoumarins 2-methylchromanones phthalide. |
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