Cn. O'Callaghan et Tbh. Mcmurry, Formation of cyclohexylidene and quinoline products from 2-methylpyran derivatives, J CHEM R-S, (8), 1999, pp. 457-457A
6-Amino-4-aryl-5-cyano-2-methylpyran-3-carboxylates undergo cleavage and re
combination when reacted with malononitrile, the products being 1-amino-3-a
ryl-2,6,6-tricyanocyclohexylidene-5-methylidenecarboxylates and related com
pounds.