Abstract
AbstractOlefinic bonds and an azoxy group held in a rigid parallel position in systems of type I undergo smooth thermal [3 + 2] cycloadditions which can be strongly catalyzed by acids. Double bonds of a bicycloheptene (norbornene) moiety are ca. 10 times more reactive than those of a bicyclooctene system. The newly formed cage compounds of type K are the first stable derivatives of the so far unknown 1,2,3‐oxadiazolidine.
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