149550-29-8Relevant articles and documents
PREPARATION OF SOME NEW BENZYLIDENEMALONONITRILES BY AN SNAr REACTION: APPLICATION TO NAPHTHOPYRAN SYNTHESIS
Bloxham, Jason,Dell, Colin P.,Smith, Colin W.
, p. 399 - 408 (2007/10/02)
The reaction of 4-fluoro-3-nitrobenzylidenemalononitrile (3) with piperidine and 1-naphthol yields the addition-elimination product (9) rather than the expected naphthopyran (7).This reaction is extended to produce other 3,4-disubstituted benzylidenemalononitriles (10)-(13).These compounds are then reacted with 1-naphthol and 4-methylmorpholine producing the naphthopyrans (14)-(17).