Abstract
Herein, we demonstrate an efficient two-step preparation of substituted cyclobutyl-fused 1-tetralones bearing four contiguous stereochemical centers, including (i) intermolecular aldol condensation of o-cinnamyl acetophenones with arylaldehydes, and (ii) intramolecular photolytic annulation of the resulting o-cinnamyl chalcones. The key structures are determined by single-crystal X-ray analysis. Plausible mechanism is also presented.
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