Abstract

Abstract Photoirradiation of a mixture of 4-benzoylbenzoate (1) and 4-(2-phenylethenyl)benzoate yielded regioselective oxetanes in the presence of hydrotalcite clay. Similar irradiation of a mixture of 1 and cinnamate gave rise to β-truxinate, but not oxetane. The unexpected formation of oxetanes is understood by the favorable distance between C=O and C=C bonds packed in clay interlayers.

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