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2 results on '"Hai-bin, Yang"'

1. A redox-economical synthesis of trifluoromethylated enamides with the Langlois reagent

Author

Hai-Bin Yang and Nicklas Selander

Subjects
chemistry.chemical_classification, Ketone, 010405 organic chemistry, Organic Chemistry, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, Biochemistry, Redox, Copper, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Amide, Reagent, Organic chemistry, Physical and Theoretical Chemistry, Oxazole
Abstract

A redox-economical strategy for the synthesis of trifluoromethylated enamides using copper catalysis is reported. The reaction employs the inexpensive Langlois reagent (CF3SO2Na) and takes place without the need of an external oxidant. The trifluoromethylated enamide products can easily be converted into the corresponding ketone, saturated amide or oxazole.

Published
2017

2. Yb(NTf2)3-catalyzed [3 + 3] cycloaddition between isatin ketonitrones and cyclopropanes to construct novel spiro[tetrahydro-1,2-oxazine]oxindoles

Author

Min Shi and Hai-Bin Yang

Subjects
Cyclopropanes, Isatin, Models, Molecular, Indoles, Cycloaddition Reaction, Organic Chemistry, Intermolecular force, Stereoisomerism, Biochemistry, Cycloaddition, Catalysis, Oxindoles, chemistry.chemical_compound, chemistry, Cyclization, Oxazines, Organic chemistry, Nitrogen Oxides, Spiro Compounds, Physical and Theoretical Chemistry, Ytterbium, Lewis Acids
Abstract

Yb(NTf(2))(3)-catalyzed [3 + 3] cycloaddition between isatin ketonitrones and cyclopropanes is described. A variety of spiro[tetrahydro-1,2-oxazine]oxindoles were obtained in moderate to good yields along with good regioselectivities. This is the first example of the intermolecular [3 + 3] cycloaddition between ketone-derived nitrones and cyclopropanes.

Published
2012

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