翻訳と辞書 Words near each other ・ Seyfabad, Selseleh ・ Seyfabad, Yazd ・ Seyfabad, Zanjan ・ Seyfabad-e Allah Yar ・ Seyfabad-e Bozorg ・ Seyfabad-e Khaleseh ・ Seyfabad-e Muqufeh ・ Seyfal mulk (opera) ・ Seyfarth Shaw ・ Seyfe, Suluova ・ Seyfert ・ Seyfert (crater) ・ Seyfert galaxy ・ Seyfert Mill ・ Seyfert's Sextet ・ Seyferth–Gilbert homologation ・ Seyfetler, Zonguldak ・ Seyfettin Yılmaz ・ Seyffarth ・ Seyfi ・ Seyfi Arkan ・ Seyfi Berksoy ・ Seyfi Düzgören ・ Seyfiabad ・ Seyfo Soley ・ Seyfollah ・ Seyfried ・ Seyfula Magomedov ・ Seyfurabad ・ Seyhan Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Seyferth–Gilbert homologation ： ウィキペディア英語版 Seyferth–Gilbert homologation The Seyferth–Gilbert homologation is a chemical reaction of an aryl ketone 1 (or aldehyde) with dimethyl (diazomethyl)phosphonate 2 and potassium tert-butoxide to give substituted alkynes 3. Dimethyl (diazomethyl)phosphonate 2 is often called the Seyferth–Gilbert reagent. This reaction is called a ''homologation'' because the product has exactly one additional carbon more than the starting material. ==Reaction mechanism== Deprotonation of the Seyferth–Gilbert reagent A gives an anion B, which reacts with the ketone to form the oxaphosphetane D. Elimination of dimethylphosphate E gives the vinyl diazo-intermediate Fa and Fb. The generation of nitrogen gas gives a vinyl carbene G, which via a 1,2-migration forms the desired alkyne H. 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「Seyferth–Gilbert homologation」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.