Tetrahedron Letters p. 5591 - 5594 (1989)
Update date:2022-08-04
Topics:
Eberbach, Wolfgang
Maier, Wolfram
On thermal activation α-butenynyl substituted pyridine-N-oxides 4 undergo a multistep rearrangement affording 4-oxo-4H-quinolizines (8) and 2-acylindolizines (9).In the geometrical isomeriziation of E-4 to Z-4 annulated isoxazolidines (7) are involved as unstable intermediates.
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