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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 Methoxymethylenetriphenylphosphine ： ウィキペディア英語版 Methoxymethylenetriphenylphosphine Methoxymethylenetriphenylphosphine is a Wittig reagent with used as an reagent in the homologization of aldehydes and ketones to extended aldehydes, an organic reaction first reported in 1958 . This reagent is quite unstable to even mild temperatures and water. As such it must be made in situ, taking on a blood red color, indicative of destabalized ylides. ==Preparation== The reagent can be prepared (''scheme 1'') by reaction of triphenylphosphine 1 with chloromethyl methyl ether 2 in diethyl ether to the phosphonium salt 3. 3 can also be prepared from triphenylphosphine, methylal and acetyl chloride, a reaction avoiding the costly and carcinogenic chloroalkyl ether and especially useful for large batches. This salt is deprotonated to the phosphonium ylide Methoxymethylenetriphenylphosphine 4 by phenyllithium. 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「Methoxymethylenetriphenylphosphine」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.