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Note | Regular issue | Vol 60, No. 4, 2003, pp.939-946
Published online, 10th February, 2003
DOI: 10.3987/COM-02-9690
Convenient Synthesis of Furopyranopyrandione Derivatives by the CAN-mediated Furan Ring Formation

Kazuhiro Kobayashi,* Katsunori Nagase, Osamu Morikawa, and Hisatoshi Konishi

*Department of Materials Science, Faculty of Engineering, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan


4H,9H-Furo[3,2-c]pyrano[3,4-e]pyran-4,9-dione (8) and (10) and 4H,5H-furo[2,3-b]pyrano[3,4-e]pyran-4,5-dione derivatives (9) were prepared in one step by treating 4-hydroxy-2H,5H-pyrano[4,3-b]pyran-2,5-diones (6) and alkenes (7) (or phenylacetylene) in acetonitrile with 2 equivalents of cerium(IV) ammonium nitrate (CAN).