Abstract

The Δ 3-imidazoline 3-oxides 1 undergo diastereoselective cycloaddition with dimethyl acetylenedicarboxylate 2 to give 3a,4,5,6-tetrahydroimidazo[1,5- b ]isoxazoles 3. Thermal and base induced ring-opening reactions of compounds 3 were demonstrated.

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