The reactions of diazo compounds with lactones. Part 2.† The reaction of cyclic 2-diazo-1,3-dicarbonyl compounds with diketene: benzofuran formation
作者:Paul V. Murphy、Timothy J. O’Sullivan、Bryan D. Kennedy、Niall W. A. Geraghty
DOI:10.1039/b001394n
日期:——
Cyclic 2-diazo-1,3-dicarbonyl compounds react with diketene in the presence of rhodium(II) salts to give benzofurans as the major isolated products. The formation of intermediate products with exocyclic double bonds which isomerise to benzofurans provides support for the proposed mechanism which involves initial formation of a dioxaspirooctenone by a formal dipolar cycloaddition reaction of a carbenoid to the exocyclic double bond of diketene followed by the loss of carbon dioxide. Acyclic 2-diazo-1,3-dicarbonyl compounds give furans in poor yield.
Remers,W.A.; Jones,G.S., Journal of Heterocyclic Chemistry, 1975, vol. 12, p. 421 - 422
作者:Remers,W.A.、Jones,G.S.
DOI:——
日期:——
Cunningham, Patrick D.; Geraghty, Niall W. A.; McArdle, Patrick J., Journal of the Chemical Society. Perkin transactions I, 1997, # 1, p. 1 - 4
作者:Cunningham, Patrick D.、Geraghty, Niall W. A.、McArdle, Patrick J.、Murphy, Paul V.、O'Sullivan, Timothy J.
DOI:——
日期:——
Efficient synthesis of dihydrofurans and furans by rhodium(II)-catalyzed reactions of cyclic diazodicarbonyl compounds
作者:Yong Rok Lee、Jung Yup Suk
DOI:10.1016/s0040-4020(02)00118-7
日期:2002.3
An efficient synthesis of dihydrofurans and furans is achieved by rhodium-catalyzed reactions of cyclic diazodicarbonyl compounds with allyl halides. This method provides a rapid entry toward naturally occurring furocoumarin and furophenalenone derivatives.