摘要
由環戊酮(III)以各種反應條件合成二溴環戊酮(V)。爲證明2,2-異構物(XIII或XIV)產生與否，試行與苯醛之縮合反應；但均未得到其衍生物(XV或XVI)。V與氯化銀作用時生成2-環戊烯-2-醇-1-酮(IV)；其產量爲二氧化硒法之三倍。關於此反應之機構亦有所討論。V與二當量乙酸銀作用時發現意外實驗結果。卽僅一溴原子被取代產生一溴一乙酸酯基環戊酮(VI)。VI亦由V與乙酸間之反應產生。VI之水解生成IV。二溴環己酮與二當量乙酸銀作用時，亦僅一溴原子被取代，產生溴乙酸酯基環己酮(XIX)。關於此反應之機構亦有所討論。
關鍵字
無資料並列摘要
Dibromocyclopentanone (V) was prepared, under various reaction conditions, from cyclopentanone (III). In order to know whether the 2,2-isomor (XIII or XIV) was formed or not, the condensation of v with benzaldehyde was tried; but the dibenzylidone derivative (XV or XVI) could not be obtained. V, on treating with silver oxide, gave 2-cyclopenteno-2-ol-1-one (IV) in a yield thrice as much as that of selenium dioxide method. The mechanism of the reaction was discussed. Unexpectedly, V (or dibromocyclohexanone) gave, on treating with two equivalents of silver acetate, bromoacetoxycyclo-pentanone (VI) (or-hoxanone), the reaction mechanism of which was also discussed. VI was also obtained from the reaction of V with acetic acid The hydrolysis of VI yielded IV.
並列關鍵字
無資料延伸閱讀
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