Hydroxyketones
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Synthesis of the C(7)-C(20) Fragment of Spirotoamides A, B and C
This work describes the preparation of the C(7)-C(20) fragment of spirotoamides A to C in a very elegant fashion, achievement very high levels of stereocontrol. The synthesis has been accomplished by a sequence involving 14 steps (0.36% overall yield, average of 81% for each step) in high diastereo and enantioselectivity, employing, as determining steps, asy
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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2. Synthesis of New Bis-Iminodihydrofurans
A new synthetic pathway to new bis-iminodihydrofurans is proposed, which involves the synthesis of N-substituted iminodihydrofurans from reaction of iminodihydrofurans with 2-cyanoacetohydrazide and their condensation with tertiary α-hydroxyketones. This sequence of reactions opens the new approach to the synthesis of novel polyheteroconjugated systems cons
J. Braz. Chem. Soc.. Publicado em: 2016-05
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3. Reduction reactions, hydrolysis and resolution of racemates, using as whole cell biocatalys SESAME SEED (Sesamum indicum L.) / ReaÃÃes de reduÃÃo, hidrÃlise e resoluÃÃo de racematos, usando como biocatalisador cÃlulas Ãntegras de sementes de gergelim Sesamum indicum L
O presente trabalho relata a utilizaÃÃo de sementes de gergelim secas e germinadas como fonte de enzimas em reaÃÃes de reduÃÃo, hidrÃlise e esterificaÃÃo. Uma sÃrie de reaÃÃes de reduÃÃo utilizando como biocatalisador sementes de gergelim quimiotipo negra (SGN) foram realizadas, tendo como substratos: acetofenona e derivados halogenados de acet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2012
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4. Reação de Maillard : propriedades e estrutura das melanoidinas da frutose e glicina
Melanoidins were prepared using 1.25 and 2.50 M fructose, and 0.66 and 1.32 M glycine at pH s of 3.0, and 6.0 and at temperatures of 70.0, 80.0, and 90.0ºC. The melanoidins obtained at pH 3.0 were unsoluble in water and were isolated by fi1tration. Those obtained at pH 6.0 were water soluble and were purified by dialysis using a cellophane membrane. Infrare
Publicado em: 1979
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5. Thujaplicins from Thuja plicata as iron transport agents for Salmonella typhimurium.
Strains of Salmonella typhimurium which are unable to synthesize their normal iron transport agent, enterobactin, and which must be supported with an exogenous chelator (siderophore) on certain media, were used to examine various types of wood for the presence of chelators. Western red cedar wood, Thuja plicata, was observed to contain large amounts of three