Cuprates derived from endo-(n + 3)-bromobicyclo[n.1.0]alkanes and related compounds and their reaction with .beta.-iodo enones. Facile homo-[1,5]-sigmatropic hydrogen migrations involving endo-(n + 3)-(3-keto-1-cycloalkenyl)bicyclo[n.1.0]alkanes
作者:Edward Piers、Isao Nagakura、James E. Shaw
DOI:10.1021/jo00411a052
日期:1978.8
Synthesis of Functionalized Cyclopentenecarboxaldehydes
作者:S. Canonica、M. Ferrari、G. Jommi、M. Sisti
DOI:10.1055/s-1988-27674
日期:——
Ozonolysis of the ethylene acetals of 2-substituted 2-cyclohexenones followed by cyclization of the intermediate 1,6-dicarbonyl compounds affords 6-substituted 7-formyl-1,4-dioxaspiro[4,4]non-6-enes in modest yields. The same procedure applied to protected 2-substituted 2-cyclohexenols gives 2-substituted 3-formyl-2-cyclopentenyl 2-methoxyethoxymethyl ethers in satisfactory yields.