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2005
Furan derivatives
R 0060
Convenient Synthesis of 5-Methylene-4-substituted-2(5H)-furanones. — Stobbe
of aromatic aldehydes (I) or dodecyl aldehyde (VIII) with ethyl levulinate
22- 096 condensation
followed by treatment with acetic anhydride results in a novel synthesis of the title compounds (V) and (X). They represent a structure present in many natural products. However, the reaction is accompanied by the unavoidable formation of major amounts of
mixed anhydride (VI) and (XI) or the naphthalenes (VII) as side products. —
(MAHAJAN, V. A.; SHINDE, P. D.; BORATE, H. B.; WAKHARKAR*, R. D.;
Tetrahedron Lett. 46 (2005) 6, 1009-1012; Div. Org. Chem., Natl. Chem. Lab., Pune
411 008, India; Eng.) — Mais
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