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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 Hydrocyanation of unsaturated carbonyl compounds ： ウィキペディア英語版 Hydrocyanation of unsaturated carbonyl compounds Hydrocyanation of unsaturated carbonyl compounds is a special case of the Michael reaction which can lead to β-cyanoketones, β-cyano-cyanohydrins, or vinyl cyanohydrins. Fine-tuning reaction conditions allows access to any of these products.〔Nagata, W.; Yoshioka, M. ''Org. React.'' 1977, ''25'', 255. 〕 ==Introduction== Hydrocyanation refers to the addition of the elements of hydrogen and cyanide across a multiple bond. When the multiple bond is polarized by an electron-withdrawing group, selective addition results. However, when the electron-withdrawing group is a carbonyl, the possibility of 1,2 (direct) addition to the carbonyl group exists. Methodological advances now permit access to both direct and conjugate addition products. ''(1)''357px Diastereoselectivity can be achieved in prochiral, conformationally restricted substrates. Catalytic, enantioselective methods, however, are rare.〔Sammis, G.M.; Danjo, H.; Jacobsen, E.N. ''J. Am. Chem. Soc.'' 2004, ''126'', 9928.〕 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「Hydrocyanation of unsaturated carbonyl compounds」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.