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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Kostanecki acylation ： ウィキペディア英語版 Kostanecki acylation The Kostanecki acylation is a method used in organic synthesis to form chromones or coumarins by acylation of ''O''-hydroxyaryl ketones with aliphatic acid anhydrides, followed by cyclization. If benzoic anhydride (or benzoyl chloride) is used, a particular type of chromone called a flavone is obtained. ==Mechanism== The mechanism consists of three well-differentiated reactions:〔Ellis, G. P. (1977) ''Chromenes, Chromanones, and Chromones from The Chemistry of Heterocyclic Compounds'', Weissberger, A. and Taylor, E. C., eds.; Wiley & Sons: New York, vol. 31, p. 495.〕 # Phenol ''O''-acylation with formation of a tetrahedral intermediate # Intramolecular aldol condensation to cyclize and to form a hydroxydihydrochromone # Elimination of the hydroxyl group to form the chromone (or coumarin) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kostanecki acylation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.