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- W2045186980 abstract "Tetracarbonyl(α-ethoxybenzyliden)eisen (2) bildet bei 20°C mit zwei äquivalenten Isocyanid 3 (R–NC, RCH3, C6H11, C6H5) in einer templatgesteuerten [1 + 1 + 2]-Cycloaddition rasch und praktisch quantitativ die 3-Iminoazetidinyliden-Komplexe 5. Aus diesen lassen sich mit KMnO4 in Benzol/Wasser glatt und einfach die β-Lactame 7 freisetzen. Die Reaktion verläuft über Keteniminkomplexe, die sich durch Addition von Ethanol als Aminocarbenkomplexe abfangen lassen. Organic Syntheses via Transition Metal Complexes, 261). – A Facile Route to β-Lactames from iron Carbene Complexes and Isocyanides by Metal-Induced [1 + 1 + 2] Cycloaddtion Tetracarbonyl(α-ethoxybenzyliden)iron (2) reacts rapidly and smoothly with two equivalents of isocyanides 3 (R–NC, RCH3, C6H11, C6H5) at 20°C to give 3-iminoazetidinylidene complexes 5 in a metal-induced [1 + 1 + 2] cycloaddition reaction. From these β-lactames 7 can be disengaged in high yields with KMnO4 in benzene/water. The reaction proceeds via the intermediate formation of ketenimine complexes, which can be trapped with ethanol to give aminocarbene complexes 6." @default.
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- W2045186980 date "1987-08-01" @default.
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- W2045186980 title "Organische Synthesen mit Übergangsmetallkomplexen, 26 <sup>1)</sup> β‐Lactame aus Eisencarben‐Komplexen und Isocyaniden durch metallinduzierte [1 + 1 + 2]‐Cycloaddition" @default.
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- W2045186980 doi "https://doi.org/10.1002/cber.19871200806" @default.
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