Journal
CHEMISTRY OF HETEROCYCLIC COMPOUNDS
Volume 45, Issue 12, Pages 1478-1484Publisher
SPRINGER
DOI: 10.1007/s10593-010-0454-9
Keywords
4-hydroxy-2-oxo-1,2-dihydroquinoline; isatin; malononitrile; pyrano[3,2-c] quinoline; spiro[indole-3,4 '-pyran]; X-ray structural analysis
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A three-component condensation of 1-allyl-4-hydroxy-2-oxo-1,2-dihydroquinoline, isatin, and malononitrile gave a satisfactory yield of 4,3'-spiro[(6-allyl-2-amino-5-oxo-5,6-dihydro-4H-pyrano[ 3,2-c] quinoline-3-carbonitrile)-2'-oxindole], which structure was confirmed by X-ray analysis.
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