Tetrahedron Letters

Heterocyclic synthesis by electrocyclization of extended dipoles: A novel access to the indolizine and quinolizine systems

W Eberbach, W Maier

文献索引：Eberbach, Wolfgang; Maier, Wolfram Tetrahedron Letters, 1989 , vol. 30, # 41 p. 5591 - 5594

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被引用次数: 16

摘要

Abstract 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.