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2 results on '"Rossella Di Guida"'

1. Highly efficient iron(III) molecular catalysts for solketal production

Author

Maria Elena Cucciolito, Fabio Montagnaro, Francesco Ruffo, Rossella Di Guida, Roberto Esposito, Angela D'Amora, Esposito, Roberto, Cucciolito, MARIA ELENA, D'Amora, Angela, Di Guida, Rossella, Montagnaro, Fabio, and Ruffo, Francesco

Subjects
010405 organic chemistry, General Chemical Engineering, Energy Engineering and Power Technology, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, Fuel Technology, chemistry, Homogeneous, Solketal, Acetone, Glycerol, Organic chemistry, Iron, Solketal, Glycerol, Acetone
Abstract

This communication describes extremely efficient homogeneous iron(III) catalysts for the synthesis of solketal from glycerol and acetone. The activities are the highest ever reported so far for this type of reaction, with TOFs up to 10 5 h − 1 at negligible catalyst loading.

Published
2017
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2. O-specific polysaccharide structure isolated from the LPS of the Antarctic bacterium Pseudomonas ANT_J38B

Author

Maria Michela Corsaro, Angela Casillo, Rossella Di Guida, Di Guida, R., Casillo, A., and Corsaro, M. M.

Subjects
Gulopyranuronamide, Stereochemistry, Disaccharide, Lipopolysaccharide, Pseudomona, 010402 general chemistry, Polysaccharide, 01 natural sciences, Biochemistry, Analytical Chemistry, chemistry.chemical_compound, Pseudomonas, Phenol, Petroleum ether, chemistry.chemical_classification, Psychrotolerant, Chloroform, biology, 010405 organic chemistry, Hydrolysis, Organic Chemistry, O Antigens, General Medicine, Nuclear magnetic resonance spectroscopy, biology.organism_classification, NMR, 0104 chemical sciences, Carbohydrate Sequence, chemistry, Solvents, Acid hydrolysis
Abstract

Pseudomonas ANT_J38B is a Gram-negative bacterium isolated from an Antarctic island. LPS was extracted using the phenol/chloroform/petroleum ether method. A mild acid hydrolysis followed by a gel filtration purification afforded the O-chain. The polysaccharide was characterized by means of chemical analyses and NMR spectroscopy. The O-chain displays a disaccharide repeating unit with the following backbone: →4)-α- l -GulpNAc3OAcAN-(1 →3)-β- d -QuipNAc-(1→ .

Published
2020
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