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Start Over Author "Sumito Seki" Topic boron trifluoride
2 results on '"Sumito Seki"'

1. A new synthetic access to N-alkylated nitrones through Lewis acid-catalyzed conjugate additions of aldoximes

Author

Shuji Kanemasa, Kimitaka Nakama, and Sumito Seki

Subjects
inorganic chemicals, chemistry.chemical_classification, Addition reaction, Chemistry, Organic Chemistry, Iodide, chemistry.chemical_element, Zinc, Alkylation, Biochemistry, Medicinal chemistry, Catalysis, chemistry.chemical_compound, Drug Discovery, Lewis acids and bases, Boron trifluoride, Conjugate
Abstract

In the presence of Lewis acid catalysts, aldoximes react with α,β-unsaturated carbonyl compounds at room temperature to give N-alkylnitrones in good yields. Combination of two Lewis acid catalysts, zinc(II) iodide/boron trifluoride etherate (50 mol%/50 mol%), is the best choice to mediate the reactions producing N-alkylated nitrones in excellent yields. In this procedure, a variety of aldoximes and α,β-unsaturated carbonyl acceptors can be employed.

Published
2001

2. ChemInform Abstract: A New Synthetic Access to N-Alkylated Nitrones Through Lewis Acid Catalyzed Conjugate Additions of Aldoximes

Author

Sumito Seki, Kimitaka Nakama, and Shuji Kanemasa

Subjects
inorganic chemicals, chemistry.chemical_classification, Iodide, chemistry.chemical_element, General Medicine, Zinc, Alkylation, Catalysis, chemistry.chemical_compound, chemistry, Organic chemistry, Lewis acids and bases, Boron trifluoride, Conjugate
Abstract

In the presence of Lewis acid catalysts, aldoximes react with α,β-unsaturated carbonyl compounds at room temperature to give N-alkylnitrones in good yields. Combination of two Lewis acid catalysts, zinc(II) iodide/boron trifluoride etherate (50 mol%/50 mol%), is the best choice to mediate the reactions producing N-alkylated nitrones in excellent yields. In this procedure, a variety of aldoximes and α,β-unsaturated carbonyl acceptors can be employed.

Published
2010

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