Abstract
AbstractStable nitrile oxides are added stereospecifically and regioselectively to the carboncarbon double bond of 2‐phenyl‐4‐arylidene‐5(4H)‐oxazolones resulting spiro‐derivatives 3, 5. The spectral properties of the reaction products are discussed. The cycloadducts give several substituted isoxazolines via an opening of the oxazolone ring with nucleophilic reagents.
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