SEARCH Articles Figures Tables Acylation intramolecular Benzyl Meldrum intramolecular Friedel-Crafts acylation Friedel acylation Friedel intramolecular Friedel-Crafts acylation intramolecular Intramolecular -acyl Intramolecular Friedel-Crafts Meldrum intramolecular Friedel-Crafts