翻訳と辞書 Words near each other ・ Kraskovo, Slovakia ・ Kraskowo, Elbląg County ・ Kraskowo, Kętrzyn County ・ Kraskowszczyzna ・ Krasków ・ Krasków, Lower Silesian Voivodeship ・ Krasków, Opole Voivodeship ・ KRAO-FM ・ KRAP ・ Krap ・ Krapa ・ Krapa, India ・ Krapanj ・ Krapanski Potok ・ Krapchene ・ Krapcho decarboxylation ・ Krape parish ・ Krapets ・ Krapets Glacier ・ Krapets, Dobrich Province ・ Krapeu ・ Krapfenberg ・ Krapina ・ Krapina (river) ・ Krapina Selo ・ Krapina-Zagorje County ・ Krapinske Toplice ・ Krapivinsky ・ Krapivinsky District ・ Krapivna 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 Krapcho decarboxylation ： ウィキペディア英語版 Krapcho decarboxylation The Krapcho decarboxylation is the chemical reaction of esters with halide anions. The ester must contain an electron-withdrawing group in the beta position, such as β-ketoesters, malonic esters, α-cyanoesters, or α-sulfonylesters. It works best with methyl esters, since it is an SN2-reaction at carbon. It is driven by the entropy of the overall reaction, as the byproducts chloromethane and CO2 are lost as gases. The reaction is a useful synthetic procedure to hydrolyze and decarboxylate malonic esters because it only cleaves one of the ester groups. The alternative way (e.g. basic hydrolysis) destroys both of the ester groups and a subsequent reaction is usually used to regenerate the alkylated ester. : ==References== 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「Krapcho decarboxylation」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.