NaPMoVO-catalyzed one-pot oxidative esterification of benzaldehyde with hydrogen peroxide.

The activity of the sodium salts of vanadium-doped phosphomolybdic acid was assessed in the oxidative esterification reaction of benzaldehyde with hydrogen peroxide in alkyl alcohol solutions. The effect of main reaction parameters, such as temperature, catalyst load, vanadium doping level, and reactant stoichiometry, on the conversion and reaction selectivity was investigated. Among the tested heteropoly salts, NaPMoVO was the most active and selective catalyst, achieving almost complete conversion of benzaldehyde and high ester selectivity regardless of the alcohol investigated.

Vanadium-doped phosphomolybdic acids as catalysts for geraniol oxidation with hydrogen peroxide.

In this work, vanadium-doped phosphomolybdic acids were evaluated as catalysts in green oxidation routes of terpene alcohols with hydrogen peroxide. A series of phosphomolybdic acids containing a variable load of vanadium cations (, V ions) were synthesized, and tested as catalysts in geraniol oxidation, the model molecule selected. All the catalysts were characterized by powder X-ray diffraction, attenuated diffuse reflectance infrared spectroscopy, UV-Vis spectroscopy, thermogravimetric analysis, N adsorption-desorption isotherms, scanning electronic microscopy, X-ray dispersive spectroscopy, and -butylamine potentiometric titration.

Vanadium-doped sodium phosphomolybdate salts as catalysts in the terpene alcohols oxidation with hydrogen peroxide.

In this work, we have explored the catalytic activity of Keggin-type heteropolyanions PMo V O ( = 0, 1, 2, or 3) in the form of sodium salts in green oxidation routes of terpene alcohols with hydrogen peroxide. Nerol was the model molecule selected to assess the impacts of the main reaction parameters, such as temperature, catalyst load, and stoichiometry of reactants. The impacts of the presence of vanadium at different proportions (, V, V, and V loads/per anion) in the structure of phosphomolybdate catalysts were assessed.

One-pot synthesis at room temperature of epoxides and linalool derivative pyrans in monolacunary NaPWO-catalyzed oxidation reactions by hydrogen peroxide.

In this work, we describe a new one-pot synthesis route of valuable linalool oxidation derivatives (, 2-(5-methyl-5-vinyltetrahydrofuran-2-yl propan-2-ol) (1a)), 2,2,6-trimethyl-6-vinyltetrahydro-2-pyran-3-ol (1b) and diepoxide (1c), using a green oxidant (, hydrogen peroxide) under mild conditions (, room temperature). Lacunar Keggin heteropolyacid salts were the catalysts investigated in this reaction. Among them, NaPWO was the most active and selective toward oxidation products.

Deficits in anthropometric indices of nutritional status and motor performance among low birth weight children from Maputo City, Mozambique.

Objective: To evaluate associations between low birth weight (LBW) and anthropometry, body composition, physical fitness, and gross motor coordination among schoolchildren from Maputo, Mozambique.

Methods: A total of 353 children aged 7 to 10 years old from both genders born in Maputo (Mozambique) were sampled. The sample was divided into two groups: LBW (n = 155) and normal birth weight (NBW, n = 198).