Three-component condensation of 5-aminopyrazole derivatives with isatins and Meldrum’s acid. Synthesis of 1,7-dihydrospiro[pyrazolo[3,4-b]-pyridine-4,3′-indole]-2′,6(1′H,5H)-diones
作者:B. V. Lichitsky、A. N. Komogortsev、A. A. Dudinov、M. M. Krayushkin
DOI:10.1007/s11172-009-0202-4
日期:2009.7
A new method for the synthesis of hitherto unknown substituted 1,7-dihydrospiro-[pyrazolo[3,4-b]pyridine-4,3′-indole]-2′,6(1′H,5H)-diones based on three-component condensation of 5-aminopyrazoles with Meldrum’s acid and isatins is developed.