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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 Barton–McCombie deoxygenation ： ウィキペディア英語版 Barton–McCombie deoxygenation The Barton–McCombie deoxygenation is an organic reaction in which an hydroxy functional group in an organic compound is replaced by a hydrogen to give an alkyl group. It is named for the British chemists Sir Derek Harold Richard Barton (1918–1998) and Stuart W. McCombie. This deoxygenation reaction is a radical substitution. In the related Barton decarboxylation the reactant is a carboxylic acid. == Mechanism == The reaction mechanism consists of a catalytic radical initiation step and a propagation step. The alcohol (1) is first converted into a xanthate (2). Then, tributylstannane 3 is decomposed by AIBN 8 into a tributylstannyl radical 4. The tributyltin radical abstracts the xanthate group from 2 leaving an alkyl radical 5 and tributyltin xanthate (7). The sulfur tin bond in this compound is very stable and provides the driving force for this reaction. The alkyl radical in turn abstracts a hydrogen atom from a new molecule of tributylstannane generating the desired deoxygenated product (6) and a new radical species ready for propagation. 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「Barton–McCombie deoxygenation」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.