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15 results on '"d'Ischia, Marco"'

13. The first entry to 5,6-dihydroxy-3-mercaptoindole, 5-hydroxy-3-mercaptoindole and their 2-carbomethoxy derivatives by a mild thiocyanation/reduction methodology

Author

Alessandro Pezzella, Marco d'Ischia, Alfonso Iadonisi, Alessandra Napolitano, Aniello Palma, Pezzella, A., Palma, A., Iadonisi, A., Napolitano, A., D'Ischia, M., Pezzella, Alessandro, A., Palma, Iadonisi, Alfonso, Napolitano, Alessandra, and D'Ischia, Marco

Subjects
Reduction (complexity), Derivative (finance), Chemistry, Acetylation, Organic Chemistry, Drug Discovery, Organic chemistry, General Medicine, Medicinal chemistry, Biochemistry
Abstract

The hitherto unknown 5,6-dihydroxy-3-mercaptoindole ( 4a ) and its 2-carbomethoxy derivative ( 4b ), as well as the analogous 5-hydroxy 3-mercaptoindoles, have been conveniently obtained as O , S -acetyl derivatives 3a – d by thiocyanation of the corresponding acetoxyindoles 1a – d with the NH 4 SCN/oxone system followed by SmI 2 reduction and acetylation.

Published
2007

14. Nitrosation-oxidative ring contraction of α-tocopherol by reaction with nitric oxide under aerobic conditions

Author

Marco d'Ischia, D'Ischia, M., and D'Ischia, Marco

Subjects
chemistry.chemical_compound, Contraction (grammar), Cyclohexane, chemistry, Organic Chemistry, Drug Discovery, Nitrosation, Organic chemistry, Oxidative phosphorylation, Tocopherol, Biochemistry, Medicinal chemistry, Nitric oxide
Abstract

Exposure of α-tocopherol [I; R = Me(CHMeCH2CH2CH2)3] to nitric oxide (NO) in air-satd. cyclohexane leads to a complex mixt. of products, one of which, relatively more polar, has been isolated and identified as the novel 2,3-dimethyl-4-acetyl-4-hydroxy-5-nitroso-2-cyclopentenone deriv. II [R = Me(CHMeCH2CH2CH2)3].

Published
1995

15. Isolation of a new intermediate in the oxidative conversion of 5,6-dihydroxyindole-2-carboxylic acid to melanin

Author

Giuseppe Prota, Marco d'Ischia, Orlando Crescenzi, P. Palumbo, Palumbo, P., D'Ischia, M., Crescenzi, O., Prota, G., P., Palumbo, D'Ischia, Marco, Crescenzi, Orlando, and Prota, Giuseppe

Subjects
chemistry.chemical_classification, Autoxidation, Bicyclic molecule, Chemistry, Metal ions in aqueous solution, Carboxylic acid, Organic Chemistry, Biochemistry, Oligomer, Medicinal chemistry, Melanin, chemistry.chemical_compound, Drug Discovery, Organic chemistry, Methanol, Derivative (chemistry)
Abstract

Autoxidation of 5,6-dihydroxyindole-2-carboxylic acid ( 1 ) in the presence of metal ions, e.g. Co2+, leads to a mixture of oligomers, the major of which has been isolated as the acetyl and methyl ester derivative and identified as 5,6,5′,6′-tetraacetoxy-2,2′-dicarbomethoxy-4,4′-biindolyl ( 2 ).

Published
1987

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