Tetrahedron Letters p. 6739 - 6742 (1995)
Update date:2022-07-30
Topics:
Harrowven
Dainty
In striking contrast to arenes, N-methylpyrrole undergoes Friedel-Crafts acylation with lactones. The reaction is most efficient with γ- and δ-lactones; ε-lactones proceed with poor overall conversion while β-lactones display poor selectivity. γ-Alkyl-γ-lactones readily yield 4,5,6,7-tetrahydroindol-7-ones through a sequence analogous to the Truce-Olson annulation.
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