Synthesis and biological activity of three new 5a-hydroxy spirostanic brassinosteroid analogues
AUTOR(ES)
Rodríguez, Caridad R., Villalobos, Yohan I., Becerra, Esther A., Manchado, Francisco C., Herrera, Deysma C., Zullo, Marco A. T.
FONTE
Journal of the Brazilian Chemical Society
DATA DE PUBLICAÇÃO
2003-05
RESUMO
Três novos análogos espirostânicos de brassinosteróides foram sintetizados pela primeira vez a partir de diosgenina: (25R)-2alfa,3alfa-epoxi-5alfa-hidroxiespirostan-6-ona (3), (25R)-2beta,3alfa,5alfa-triidroxiespirostan-6-ona (5) e (25R)-2beta-metoxi-3alfa,5alfa-diidroxiespirostan-6-ona (6). A substância 3 mostrou acentuada atividade promotora de crescimento vegetal no bioensaio de elongação do hipocótilo e expansão do cotilédone de rabanete, enquanto a substância 6 mostrou-se fitotóxica.
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