The 1,3-dipolar cycloaddition of (R)-5,6-dihydro-5-phenyl-2H-1,4-oxazin-2-one N-oxide[(5R)-2], a chiral and geometry fixed α-alkoxycarbonylnitrone, with alkenes 3–6 proceeded smoothly to afford cycloadducts 7–10 as main products viaβ-exo mode.
O. Tamura, K. Gotanda, R. Terashima, M. Kikuchi, T. Miyawaki and M. Sakamoto, Chem. Commun., 1996, 1861 DOI: 10.1039/CC9960001861
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