ChemInform Abstract: RHODIUM(I)‐CATALYZED REARRANGEMENTS OF 3,4‐BIS(ACYLOXY)‐1,5‐HEXADIYNES, SYNTHESIS OF (E)‐4‐((ACYLOXY)METHYLIDENE)‐2‐CYCLOPENTEN‐1‐ONES
Abstract:Bei der Umsetzung des Hexadiins (I) als 63 :37‐meso/DL‐Gemisch mit 5 mol‐% [Rh(CO)2Cl], (II) tritt Umlagerung zu dem (E)‐Cyclopentenon (III) ein; (II) kann durch andere Rh(I)‐Komplexe, wie z.B. Rh[PPh3]3Cl und [PPh3 1, RhCOCl, ersetzt werden; auch CuCl und PdCl2 geben das Produkt (III), aber in schlechten Ausbeuten.
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