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Campo DC | Valor | Idioma |
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dc.contributor.author | Barbosa, Luiz Cláudio de Almeida | |
dc.contributor.author | Maltha, Célia Regina Álvares | |
dc.contributor.author | Demuner, Antônio Jacinto | |
dc.contributor.author | Filomeno, Claudinei Andrade | |
dc.contributor.author | Silva, Antônio Alberto da | |
dc.date.accessioned | 2019-05-03T13:12:46Z | |
dc.date.available | 2019-05-03T13:12:46Z | |
dc.date.issued | 2004-03 | |
dc.identifier.issn | 1678-7064 | |
dc.identifier.uri | http://dx.doi.org/10.1590/S0100-40422004000200013 | |
dc.identifier.uri | http://www.locus.ufv.br/handle/123456789/24980 | |
dc.description.abstract | In this paper we report the synthesis of biologically active compounds through a [3+4] cycloaddition reaction to produce the main frame structure, followed by several conventional transformations. The 1,2a,4a,5-tetramethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one (11) obtained from a [3+4] cycloaddition reaction was converted into 1,2a,4a,5-tetramethyl-6,7-exo-isopropylidenedioxi-8 -oxabicyclo[3.2.1]octan-3-one (13) in 46% yield. This was further converted into the alcohols 1,2a,4a,5-tetramethyl-6,7-exo-isopropylidenedioxi-8-oxabicyclo[3.2.1]octan-3 a-ol (14), 1,2a,4a,5-tetramethyl-6,7-exo-isopropylidenedioxi-8 -oxabicyclo[3.2.1]octan-3b-ol (15), 1,2a,4a,5-tetramethyl-3-butyl-6,7-exo-isopropylidenedioxi-8-oxabicyclo[3.2.1]octan-3 a-ol (17), 1,2a,4a,5-tetramethyl-3-hexyl-6,7-exo-isopropylidenedioxi-8-oxabicyclo[3.2.1]octan-3 a-ol (18) and 1,2a,4a,5-tetramethyl-3-decyl-6,7-exo-isopropylidenedioxi-8-oxabicyclo[3.2.1]octan-3 a-ol (19). Dehydration of 17, 18 and 19 with thionyl chloride in pyridine resulted in the alkenes 20, 21 and 22 in ca. 82% - 89% yields from starting alcohols. The herbicidal activity of the compounds synthesized was evaluated at a concentration of 100 µg g-1. The most active compound was 21 causing 42,7% inhibition against Cucumis sativus L. | en |
dc.format | pt-BR | |
dc.language.iso | por | pt-BR |
dc.publisher | Química Nova | pt-BR |
dc.relation.ispartofseries | v. 27, n. 2, p. 241- 146, mar.- abr. 2004 | pt-BR |
dc.rights | Open Access | pt-BR |
dc.subject | [ 3+ 4] cycloaddition | pt-BR |
dc.subject | Oxyallyl cations | pt-BR |
dc.subject | Herbicides | pt-BR |
dc.title | Síntese de novos herbicidas derivados do 1, 2a, 4a, 5- tetrametil- 8- oxabiciclo[ 3. 2. 1] oct- 6- en- 3- ona | pt-BR |
dc.type | Artigo | pt-BR |
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