Dual formation of. beta.-diketones from methylene ketones and acetic anhydride by means of boron trifluoride. Improved method of synthesis of certain. beta.- …

CL Mao, FC Frostick Jr, EH Man…

Index: Mao,C.-L. et al. Journal of Organic Chemistry, 1969 , vol. 34, # 5 p. 1425 - 1429

Full Text: HTML

Citation Number: 30

Abstract

Evidence is presented that the formation of@ diketones from methylene ketones and acetic anhydride by means of boron trifluoride involves, not only direct C acetylation of the ketone, but also 0 acetylation of the ketone and C acetylation of the resulting ketone enol ester. The 0 acetylation is catalyzed by proton acid formed as the by-product in the C acetylation of the ketone. Certain intermediate ketone enol esters,@ diketone enol esters, and boron ...