2H-3-Chromenecarbaldehydes (3a–e) on reaction with malononitrile in the presence of piperidine gave 9-amino-6H- benzo[c]chromene-8,10-dicarbonitriles (4a–e) in good yields.
No takes yet. Share an insight, caveat, or question.
SHARMA et al. (2002) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: