Highly efficient and selective acetylation of alcohols and phenols with acetic anhydride catalyzed by a high-valent tin(IV) porphyrin, Sn(TPP)(BF4)2

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4‐Dialkylaminopyridines as Highly Active Acylation Catalysts. [New synthetic method (25)]

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Scandium Trifluoromethanesulfonate as an Extremely Active Lewis Acid Catalyst in Acylation of Alcohols with Acid Anhydrides and Mixed Anhydrides

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