Tetrahedron Letters p. 6389 - 6392 (1985)
Update date:2022-08-16
Topics:
Bergman, J.
Pelcman, B.
2-Vinylindoles are obtained from the Fischer indolization of α,β-unsaturated ketones.Heating 2-(2-methylpropenyl)indole (4) with the Vilsmeier reagent (DMF/POCl3) gave 2-methylcarbazole in good yield, presumably via an electrocyclic ring closure of a hexatrienic intermediate.
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