Five-Membered 2,3-Dioxo Heterocycles:LXIIL* Cascade Recyclization of Isopropyl 2-(1-Aryl-4,5-dioxo-2-phenyl-4,5-dihydro-1H-pyrrol-3-yl)-2-oxoacetates with Cyclic Enamines. Crystalline and Molecular Structure of 1'-Benzyl-6',6'-dimethyl-3-[(Z)-phenyl(

摘要

Isopropyl 2-(1-aryl-4,5-dioxo-2-phenyl-4,5-dihydro-1H-pyrrol-3-yl)-2-oxoacetates reacted with N-substituted 3-amino-5,5-dimethylcyclohex-2-en-l-ones to give the corresponding 1'-substituted(Z)-6',6'-di-methyl-3-[phenyl(arylamino)methylidene]-6',7'-dihydro-3H-spiro[furan-2,3'-indole]-2',4,4',5(1'H,5'H)-tetraones.The structure of 1'-benzyl-6',6'-dimethyl-3-[(Z)-phenyl(phenylamino)methylidene]-6',7'-dihydro-3H-spiro[furan-2,3'-indole]-2',4,4',5(1'H,5'H)-tetraone was proved by X-ray analysis.