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Tipo: | Artigo |
Título: | Síntese e avaliação da atividade fitotóxica de lactonas derivadas do 2, 4- dimetil- 8- oxabiciclo[ 3. 2. 1]- oct- 6- en- 3- ona |
Autor(es): | Barbosa, Luiz Cláudio de Almeida Maltha, Célia Regina Álvares Borges, Eduardo Euclides Lima |
Abstract: | The alkene 2,4-dimethyl-8-oxabicyclo[3.2.1]-oct-6-en-3-one (3) was converted to 1,3,10-trimethyl-8-oxabicyclo[5.3.0]-dec-3-ene-2,9-dione (7) and 1,3-dimethyl-8-oxabicyclo[5.3.0]-dec-3-ene-2,9-dione (8) with a 55% overall yield in both cases. Lactones (7) and (8) were converted in two steps to 1,3,4-trimethyl-13-methylene-6-oxatricyclo[8.3.0.0 3,7]-trideca-2,5,12-trione (12) (63%) and 1,3-dimethyl-13-methylene-6-oxatricycle[8.3.0.0 3,7]-trideca-2,5,12-trione (13) (45% from 8). The effect of lactones (7), (8), (12), (13) and the intermediates (5) and (6), at the concentration of 250 mg mL-1, on the growth of Cucumis sativus L. and Sorghum bicolor L. was evaluated. The best results were observed for lactone (13) that caused 100% inhibition on the root growth of C. sativus and lactone (12) that inhibited 90% of the root growth for S. bicolor. |
Palavras-chave: | [ 3+ 4] cycloaddition Lactones Herbicides |
Editor: | Química Nova |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.1590/S0100-40422002000200006 http://www.locus.ufv.br/handle/123456789/24916 |
Data do documento: | Abr-2002 |
Aparece nas coleções: | Artigos |
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artigo.pdf | texto completo | 383,26 kB | Adobe PDF | Visualizar/Abrir |
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