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Fritsch–Buttenberg–Wiechell rearrangement : ウィキペディア英語版 | Fritsch–Buttenberg–Wiechell rearrangement The Fritsch–Buttenberg–Wiechell rearrangement, named for Paul Ernst Moritz Fritsch, Wilhelm Paul Buttenberg, and Heinrich G. Wiechell, is a chemical reaction whereby a 1,1-diaryl-2-bromo-alkene rearranges to a 1,2-diaryl-alkyne by reaction with a strong base such as an alkoxide.
This rearrangement is also possible with alkyl substituents. ==Reaction Mechanism== The strong base deprotonates the vinylic hydrogen, which after alpha-elimination forms a vinyl carbene. A 1,2-aryl migration forms the desired product, the 1,2-diaryl-alkyne.
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「Fritsch–Buttenberg–Wiechell rearrangement」の詳細全文を読む
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