Synthesis of 5H-spiro[furan-2,2′-indene]-1′,3′,5-triones from tetrahydro-4-oxoindeno[1,2-b]pyrroles

[摘要] A simple approach to assembling of functionalized spiro-butenolide-indenetriones from oxoindeno[1,2- b ]pyrrole derivatives in the presence of H 2 SO 4 is described. Simplicity of the procedure, short reaction time and excellent yields are important features of this protocol.

[学科分类] 内科医学

[关键词] amines;dialkyl acetylenedicarboxylates;2(5H)-furanones;ninhydrin