Ring cleavage of 3-arylcyclobutanones and successive Friedel–Crafts alkylation of methoxy- or alkyl-substituted benzene derivatives proceeded to give 3,3-diarylbutan-2-ones by activation with titanium tetrachloride.
Key words
cyclobutanone - Friedel–Crafts alkylation - ring cleavage - Lewis acid - aromatics