- FURANS AND PYRANS FROM γ- AND δ-KETONITRILES
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The spontaneous cyclization of δ-ketonitriles resulting from the reaction of malononitrile with either 1,2,3-triaryl-3-chloropropanones (II) or 1,2,3-triarylpropenones (III) in a basic medium leads to 2-amino-4,5,6-triaryl-3-cyano-4H-pyrans (V).On the other hand II and III react with potassium cyanide and an aromatic aldehyde in a hydroalcoholic medium to give γ-ketonitriles which cyclize to 2-arylideneimino-3,4,5-triarylfurans (VIII).
- Soto, Jose L.,Seoane, Carlos,Martin, Nazario,Blanco, Luis A.
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p. 803 - 812
(2007/10/02)
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