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Molecules 2000, 5(4), 637-647; doi:10.3390/50400637
Article

Cycloaddition Reactions of C,N-Diphenylnitrone to Methylene-γ-butyrolactones

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Received: 6 March 2000 / Accepted: 21 March 2000 / Published: 2 April 2000
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Abstract

Cycloaddition of C,N-diphenylnitrone to α-methylene-γ-butyrolactone afforded two diastereomeric 5-spirosubstituted isoxazolidines with high selectivity. Structural assignment was ascertained by NMR studies and an X-ray diffraction experiment on a single crystal of the major isomer and the diastereoselectivity was rationalized on examination of the alternative transition states leading to the two diastereoisomers.
Keywords: Nitrones; lactones; 1; 3-dipolar cycloaddition; stereoselectivity; regioselectivity Nitrones; lactones; 1; 3-dipolar cycloaddition; stereoselectivity; regioselectivity
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Cacciarini, M.; Cordero, F.M.; Faggi, C.; Goti, A. Cycloaddition Reactions of C,N-Diphenylnitrone to Methylene-γ-butyrolactones. Molecules 2000, 5, 637-647.

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