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- W2113793363 abstract "Thermisch induzierte intramolekulare [3 + 2]-Cycloadditionsreaktionen der Nicotinium-dicanmethylide 4a-c, die am Pyrrolidinstickstoff mit verschieden langen ω-Alkinseitenketten substituiert sind, führen in guten Ausbeuten zu entspr. neuen, heterocyclisch anellierten Indolizinen 6-8. Das mit einem aktivierten Seitenkettendipolarophil versehene Dicyanmethylid 9 liefert neben dem Indolizin 11 in geringen Mengen das Naphthyridin 14. Heterocyclically Annulated Indolizines by Intramolecular [3 + 2]-Cycloaddition with Nicotinium-dicyanomethylides Thermally induced intramolecular [3 + 2] cycloaddition reactions of the nicotinium dicyanomethylides 4a-c, containing different ω-alkyne sidechains as substiuents at the pyrrolidine nitrogen, lead to the corresponding novel, heterocyclically annulated indolizines 6-8 in high yields. The dicyanmethylide 9 bearing an activated side chain dipolarophile yields the naph-thyridine 14 in small amounts besides the indolizine 11." @default.
- W2113793363 created "2016-06-24" @default.
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- W2113793363 date "1993-01-01" @default.
- W2113793363 modified "2023-09-27" @default.
- W2113793363 title "Heterocyclisch anellierte Indolizine durch intramolekulare [3 + 2]-Cycloaddition mit Nicotinium-dicyanmethyliden" @default.
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- W2113793363 doi "https://doi.org/10.1002/ardp.19933260803" @default.
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