AbstractAn efficient one‐pot method is described for the synthesis of a variety of di‐ and trisubstituted 4‐pyrones based on the gold‐catalyzed cascade reactions between cyclic or acyclic diazodicarbonyl compounds and vinyl ethers. The key strategy used involves the gold‐catalyzed Wolff rearrangement of diazo compounds followed by [4+2] cycloaddition and elimination. This methodology is also applied to the synthesis of tetrasubstituted 4‐pyrones.magnified image
Photoisomerization of 4-hydroxypyrylium cations in concentrated sulfuric acid
作者:James W. Pavlik、Arthur D. Patten、David R. Bolin、Kenneth C. Bradford、Edward L. Clennan
DOI:10.1021/jo00197a040
日期:1984.11
Collie; Steele, Journal of the Chemical Society, 1900, vol. 77, p. 970
作者:Collie、Steele
DOI:——
日期:——
Photochemistry of 4-hydroxypyrylium cations in aqueous sulfuric acid
作者:James W. Pavlik、Alfred P. Spada、Thomas E. Snead
DOI:10.1021/jo00217a005
日期:1985.8
Pavlik, James W.; Snead, Thomas E.; Tata, James R., Journal of Heterocyclic Chemistry, 1981, vol. 18, p. 1481 - 1483
作者:Pavlik, James W.、Snead, Thomas E.、Tata, James R.
DOI:——
日期:——
Intramolecular arene trapping of pyran-4-one derived zwitterions: a two-step synthesis of tetrahydrobenz[e]inden-1-ones
作者:F. G. West、Duke W. Willoughby
DOI:10.1021/jo00067a007
日期:1993.7
Pyran-4-ones bearing pendant arene traps undergo efficient photolytic conversion to transient oxyallyl zwitterions, which then cyclize onto the arene in an intramolecular electrophilic aromatic substitution to yield tetrahydrobenz[e]indenones.