1H and 13C NMR assignments for two new cordiaquinones from roots of Cordia leucocephala |
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| Authors: | Jaécio Carlos Diniz Francisco Arnaldo Viana Odaci Fernandes Oliveira Maria Aparecida M. Maciel Maria da Conceição de Menezes Torres Raimundo Braz‐Filho Edilberto R. Silveira Otília Deusdênia L. Pessoa |
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| Affiliation: | 1. Departamento de Química, Universidade do Estado do Rio Grande do Norte, 59610‐210, Mossoró‐RN, Brazil;2. Universidade Federal Rural do Semi‐árido, CP 117, 59600‐970, Mossoró‐RN, Brazil;3. Departamento de Química, Universidade Federal do Rio Grande do Norte, CP 1524, 59072‐970, Natal‐RN, Brazil;4. Departamento de Química Organica e Inorganica, Centro de Ciências, Universidade Federal do Ceará, CP 12.200, 60021‐970, Fortaleza‐CE, Brazil |
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| Abstract: | From the roots of Cordia leucocephala (Boraginaceae), two new meroterpenoid naphthoquinones, 6‐[10‐(12,12‐dimethyl‐13α‐hydroxy‐16‐methenyl‐cyclohexyl)ethyl]‐1,4‐naphthalenedione (cordiaquinone L) and 5‐methyl‐6‐[10‐(12,12‐dimethyl‐13β‐hydroxy‐16‐methenyl‐cyclohexyl)methyl‐1,4‐naphthalenedione (cordiaquinone M) were isolated. Their structures were elucidated after detailed 1D and 2D NMR (COSY, HSQC, HMBC and NOESY) data analyses and comparison with literature data for analogous compounds. Copyright © 2008 John Wiley & Sons, Ltd. |
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| Keywords: | 1H NMR 13C NMR 2D NMR Cordia leucocephala Boraginaceae naphthoquinones |
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