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 GS Maia Raquel Marques Anita J Marsaioli Antônio AL Mesquita Anselmo A de Moraes Alaide B de Oliveira Geovane G de Oliveira Gentil Pedreira Sebastião K Pereira Sonildes LV Pinho Celira C Santos |
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| Institution: | 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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