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Synthesis of Chromanes and 4H-Chromenes: Exploring the Oxidation of 2H-Chromenes and Dihydro-1-benzoxepines by Hypervalent Iodine(III)
(GEORG THIEME VERLAG KGSTUTTGART, 2012)
The reaction of various oxygen-containing benzo-fused cycloalkenes were studied with the hypervalent iodine reagent hydroxy(tosyloxy) iodo]benzene [PhI(OH)OTs, HTIB]. 2H-Chromene and 4-methyl-2H-chromene resulted in ...
In vitro Trypanocidal Activity of Phenolic Derivatives from Peperomia obtusifolia
(Georg Thieme Verlag Kg, 2009-05-01)
The trypanocidal activity of crude extracts and fractions from the leaves and stems of Peperomia obtusifolia (Piperaceae) was evaluated in vitro against the epimastigote forms of Trypanosoma cruzi. Bioactivity-guided ...
In vitro Trypanocidal Activity of Phenolic Derivatives from Peperomia obtusifolia
(Georg Thieme Verlag Kg, 2009-05-01)
The trypanocidal activity of crude extracts and fractions from the leaves and stems of Peperomia obtusifolia (Piperaceae) was evaluated in vitro against the epimastigote forms of Trypanosoma cruzi. Bioactivity-guided ...
Synthesis, crystal structure, conformational and vibrational properties of 6-acetyl-2,2-dimethyl-chromane
(Elsevier, 2014-03)
The 6-acetyl-2,2-dimethyl-chromane compound was synthesized and characterized by IR, Raman, UV-Visible and 1H NMR spectroscopies. Its solid state structure was determined by X-ray diffraction methods. The substance ...
A mild and convenient one-pot photochemical synthesis of chroman-4-one derivatives. the photo-Fries rearrangement of (hetero)aryl 3-methyl-2-butenoate esters under basic catalysis
(Pergamon-Elsevier Science Ltd, 2010-08)
The biphasic base catalysis-mediated photo-Fries rearrangement reaction of aryl 3-methy-2-butenoate esters in room temperature cyclohexane - 10% KOH system was investigated. This mild photochemical reaction leads to the ...
In vitro Trypanocidal Activity of Phenolic Derivatives from Peperomia obtusifolia
(GEORG THIEME VERLAG KG, 2009)
The trypanocidal activity of crude extracts and fractions from the leaves and stems of Peperomia obtusifolia (Piperaceae) was evaluated in vitro against the epimastigote forms of Trypanosoma cruzi. Bioactivity-guided ...
Further monoterpene chromane esters from Peperomia obtusifolia: VCD determination of the absolute configuration of a new diastereomeric mixture
(Pergamon-Elsevier B.V. Ltd, 2012-11-07)
A reinvestigation of the monoterpene chromane ester enriched fraction from Peperomia obtusifolia using chiral chromatography led to the identification of a minor peak, which was elucidated by NMR and HRMS as fenchyl-3,4- ...
Further monoterpene chromane esters from Peperomia obtusifolia: VCD determination of the absolute configuration of a new diastereomeric mixture
(Pergamon-Elsevier B.V. Ltd, 2012-11-07)
A reinvestigation of the monoterpene chromane ester enriched fraction from Peperomia obtusifolia using chiral chromatography led to the identification of a minor peak, which was elucidated by NMR and HRMS as fenchyl-3,4- ...
Absolute configuration reassignment of two chromanes from Peperomia obtusifolia (Piperaceae) using VCD and DFT calculations
(Pergamon-Elsevier B.V. Ltd, 2010-10-07)
Previous analysis of the ECD spectra of two prenylated benzopyrans isolated from Peperomia obtusifolia, by means of the helicity rule for the chromane chromophore, resulted in the incorrect assignment of their absolute ...