An efficient and general entry to (Z)-alpha-fluoro-beta-substituted acrylaldehydes based on the coupling reaction of alpha-fluoro-beta-amino acrylaldehydes with organolithium reagents
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作者:
Funabiki, K
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机构:Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido
Funabiki, K
Kurita, T
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机构:Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido
Kurita, T
Matsui, M
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机构:Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido
Matsui, M
Shibata, K
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机构:Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido
Shibata, K
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[1] Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido
alpha-Fluoro-beta-amino acrylaldehydes (2), readily available from the reaction of polyfluoroalkenyl tosylates (1) with dialkylamines in the presence of triethylamine and a catalytic amount (10 mol%) of tetrabutylammonium fluoride (TBAF), reacted smoothly with various organolithium reagents at -78 degrees C for 0.5 h, followed by hydrolysis with 10% hydrochloric acid at room temperture for 1 h to afford the corresponding (Z)-alpha-fluoro-beta-substituted acrylaldehydes (3) via allylic rearrangement in good to excellent yields.