1989•Liebigs Annalen der ChemieRequires access
Studies on Cinnamonitriles: The Reaction of Cinnamonitriles with Cyclopentanone
Mamdouh A. Sofan, Fathy El‐Taweel, A. G. A. ELAGAMEY, Mohamed H. Elnagdi
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Abstract
Abstract Cyclopentanone reacts with arylidenemalononitriles 1a–c to give dihydro‐4,6‐indenedicarbonitriles 5a–c. Similarly, the diethyl dihydro‐4,6‐indenedicarboxylate derivative 6 is formed when treating ethyl α‐cyanocinnamate (1d) with cyclopentanone. Cyclopenta[b]pyrans 5a–c are obtained from the reaction of diarylidene derivatives of cyclopentanone with malononitrile.