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- W2950426115 abstract "Abstract Treatment of tungsten–η1-α,δ-alkynylamine compounds with aldehyde and BF3·Et2O led to cycloalkenation reaction, giving good yields of tungsten–η1-pyrrolylidium salts. These azacyclic carbeniums provide a short synthesis of α-alkylidene-γ-lactam via oxidation with m-CPBA. In contrast with tungsten–η1-oxacyclic carbenium, this salt reacts with one molecule of organometallic reagents such as NaBH3CN, CH3MgBr and Me2CuLi to give tungsten–η1-4,5-dihydropyrrole complexes. An alternative use of this cyclialkenation is to provide a short synthesis of 3-vinyl-Δ2-pyrrolines." @default.
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- W2950426115 date "2000-10-17" @default.
- W2950426115 modified "2023-09-27" @default.
- W2950426115 title "ChemInform Abstract: Synthesis, Reactivity and Demetallation of Tungsten-Azacyclic Carbeniums via Cycloalkenation of Tungsten-Alkynylamine Compounds." @default.
- W2950426115 cites W2078723923 @default.
- W2950426115 doi "https://doi.org/10.1002/chin.200042065" @default.
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