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- W2012205124 abstract "Reactive organometallic compounds such as allyl-zinc, -magnesium and -lithium and saturated lithium compounds are shown to readily undergo addition reactions with conjugated enynes and conjugated diynes: RCHCHC≡CH and RC≡CC≡CH; this reaction is regioselective and leads to conjugated dienes, conjugated enynes or allenes. The reactivity is reduced with conjugated enynes: RCHCHC≡CR′, but organo-magnesium and -lithium compounds lead to allenes. The reaction does not take place with conjugated diynes: RC≡CC≡CR′, under normal conditions. Les organométalliques allyliques et lithiens saturés agissent aisément sur lesénynes et diynes conjuguésàfonction acétylénique vraie; la réaction est régio-sélective selon la nature du métal M de l'organométallique utiliséet permet d'obtenir de manière univoque des diènes conjugués, desénynes conjugués et des allènes. Avec lesénynes et diynes conjuguésàfonction acétylènique substituée, la réaction d'addition est nettement plus difficile; dans les conditions expérimentales usuelles, seuls lesénynes réagissent avec les magnésiens et les lithiens pour conduireàdes allènes." @default.
- W2012205124 created "2016-06-24" @default.
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- W2012205124 date "1977-05-01" @default.
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- W2012205124 title "Etude comparative du comportement d'organometalliques allyliques et d'organolithiens satures vis a vis de carbures: RCH≡CHC≡CR′ et RC≡CC≡CR′ (R alcoyle, R′ H, alcoyle" @default.
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- W2012205124 doi "https://doi.org/10.1016/s0022-328x(00)84407-1" @default.
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