Sigmatropische Umlagerungen von Aryl-propargyläthern; Synthese von 1, 5-Dimethyl-6-methylen-tricyclo[3, 2, 1, 0<sup>2,7</sup>]-oct-3-en-8-on-Derivaten. Vorläufige Mitteilung
作者:J. Zsindely、H. Schmid
DOI:10.1002/hlca.19680510703
日期:1968.10.31
2, 6-Dimethylphenyl propargyl ether (10) and its derivatives 12–15 rearrange thermally to 1, 5-dimethyl-6-methylene-tricyclo [3.2.1.02,7]oct-3-en-8-one (9) and related compounds 16–19. The ethers undergo first an aromatic [3, 3]-sigmatropic rearrangement to ortho-allenyldienones 11, which then undergo ringclosure to the tricyclic products by an electrocyclic reaction.