Journal
JOURNAL OF HETEROCYCLIC CHEMISTRY
Volume 41, Issue 5, Pages 655-658Publisher
HETERO CORPORATION
DOI: 10.1002/jhet.5570410502
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On heating of the cyanoacetic acid cyclopentylidene hydrazide I with salicylaldehyde in the presence of bases the azaanthracene derivative 6 was formed. Also, reaction of 3 with malononitrile and ketones 10a,b afforded the pyrano[3,4-c]chromene 9 and chromeno[3,4-c]pyridine 11 respectively. A mechanism for these reactions is proposed.
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