Heterocyclic Rearrangements in Constrained Media.A Zeolite-Directed Photorearrangement of 1,2,4-Oxadiazoles

摘要

The first intrazeolite-photoinduced rearrangement of a five-membered heterocycle is reported.A completely different behavior compared to solution irradiations has been observed.The zeolite's role in directing the photoreaction of 3-phenyl-l,2,4-oxadiazoles toward the formation of the corresponding 1,3,4-oxadiazoles in a ring contraction-ring expansion route is discussed.