Now showing items 1-10 of 721
Microwave Assisted Synthesis of ethyl-quinolon-4-one-3-carboxylates and Hydrolysis to quinolon-4-one-3-carboxylic Acids
(Bentham Science Publishers, 2014-05)
A fast and efficient microwave assisted synthesis of several ethyl-quinolon-4-one-3-carboxylates and quinolon- 4-one-3-carboxylic acids has been developed. The 3-carboethoxy quinolones are easily obtained in a one-pot ...
Practical synthesis of a functionalized 1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2012)
The synthesis of a functionalized 1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid has been performed in 10 steps from the readily available dimedone. Only three purifications by flash chromatography are required ...
Study of the reaction mechanism of the transesterification of triglycerides catalyzed by zinc carboxylates
(Elsevier Science, 2013-06)
In this theoretical and experimental study, the mechanisms for the transesterification of triglycerides catalyzed by zinc carboxylates were analyzed and discussed. Different alternatives were examined: (A) the classic Lewis ...
Partitioning of Carboxylic Acid Between Oil and Water Phases: Experimental, Correlation, and Prediction
Partition coefficients for the carboxylic acids (A) acetic and formic acids between oil and water were measured, correlated, and predicted. The experiments were conducted by equilibrating the systems, soybean oil (SO)– ...
Intraspecific variability of dihydrochalcone, chromenes and benzoic acid derivatives in leaves of Piper aduncum L. (Piperaceae)
Chemical analysis carried out in leaves of 18 specimens of Piper aduncum L. (Piperaceae) occurring at Ripasa Reserve, Araraquara, SP, Brazil indicated two distinct populations when investigated over a period of 14 months ...
Structural modification influences the characteristics of Langmuir monolayers from aromatic carboxylic acids
(Academic Press IncSan DiegoEUA, 2001)
OBTENCAO DE MESALAZINA (5-ASA) POR CARBOXILACAO DE P-AMINOFENOL
The 5-aminosalicylic acid is usually prepared: 1. by the reduction of the azodye from diazotized aniline and salicylic acid and the posterior reduction of the formed compound; 2. for carboxylation with carbon dioxide under ...
Powder X-ray characterization of lithium thiazoildine-4-carboxylate
(J C P D S-int Centre Diffraction Data, 2009-03-01)
Powder X-ray diffraction studies of a lithium salt of thiazolidine-4-carboxylic acid (Li-TC4) of composition LiC(4)H(6)NSO(2) are presented in this paper. Analysis of the synchrotron powder X-ray diffraction data showed ...
Acidic biomarkers from Albacora oils, Campos Basin, Brazil
(Pergamon-elsevier Science LtdOxfordInglaterra, 1999)