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-acetyltropolones. The brominations of 4′-hydroxyacetophenone were also carried out.
在
四氢呋喃中用季
铵三
溴化物处理 3-isopenyltropolone 可以得到 3-甲基-8H-
环庚烷并[b]
呋喃-8-酮。在
甲醇-
二氯甲烷中的反应得到 7-
溴-3-甲基-8H-
环庚烷并[b]
呋喃-8-酮。3-acetyltropolone 与三
溴化物在
四氢呋喃中
溴化生成 3-(
溴乙酰基)tropolone,而在
甲醇溶剂中反应生成 7-
溴和 5,7- 二
溴取代的 3-acetyltropolone。还进行了 4′-羟基
苯乙酮的
溴化反应。