Year 2005, Month 6 (Section Brief Communications, Page 1539)
Three-component condensation
of diethyl 2,4,6-trioxoheptanedicarboxylate with salicylaldehyde
and ammonium acetate as a new method
for the synthesis of the [1]benzopyrano[4,3-b]pyridine system
V. A. Mamedov,* L. P. Sysoeva, A. T. Gubaidullin, A. I. Zamaletdinova, and I. A. Litvinov
Three-component condensation of diethyl 2,4,6-trioxoheptanedicarboxylate with salicylaldehyde and ammonium acetate in EtOH affords 2,5-diethoxycarbonyl-5-hydroxy-4-oxo-
4,4a,5,10b-tetrahydro-1H-[1]benzopyrano[4,3-b]pyridine.
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