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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 Phanephos ： ウィキペディア英語版 Phanephos |Section2= |Section3= }} Phanephos is an organophosphorus compound with the chemical formula (C2H4)2(C6H3PPh2)2 (Ph = C6H5). It is a white solid that is soluble in organic solvents. It is an example of a chiral diphosphine used in asymmetric hydrogenation. Many substituents have been introduced in place of the phenyl groups, e.g., ''i''-Pr, C6H11, etc and a variety of chiral phosphine ligands have been reported in asymmetric catalysis since the 1960s. ==Preparation== Phanephos can be prepared by two steps from ()paracyclophane. In the first step, ()paracyclophane is dibrominated to give a pseudo-para dibromide. Thermal isomerisation then gives pseudo-ortho atropisomer of dibromide. This isomer is subjected to lithium-halogen exchange by nBuLi and the resulting dilithium compound is treated with PPh2Cl to give a racemic mixture of Phanephos.〔Gareth J. R, Planar Chiral Phosphines Derived from ()Paracyclophane , Israel Journal of Chemistry, 2012, 52. 60-75, 〕 : 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「Phanephos」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.