Reactions of 3-Isopropenyl-and 3-Acetyltropolone with Quarternary Ammonium Tribromides.

Y Matsunaga, K Imafuku

Index: Matsunaga, Yoichiro; Imafuku, Kimiaki Bulletin of the Chemical Society of Japan, 1992 , vol. 65, # 1 p. 295 - 297

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Citation Number: 8

Abstract

Treatments of 3-isopropenyltropolone with quarternary ammonium tribromides in tetrahydrofuran afforded 3-methyl-8H-cyclohepta [b] furan-8-one. The reactions in methanol– dichloromethane gave 7-bromo-3-methyl-8H-cyclohepta [b] furan-8-one. Bromination of 3- acetyltropolone with the tribromides in tetrahydrofuran produced 3-(bromoacetyl) tropolone, while the reaction in the methanolic solvent gave 7-bromo-and 5, 7-dibromo-substituted 3- ...