- Novel Two-Step Synthesis of Homobarrelenones, Bicyclonona-3,6,8-trien-2-ones, from Tropones and 2,3-Bis(methoxycarbonyl)-7-oxabicyclohepta-diene by High-Pressure Cycloaddition-Thermal Cyclorevision Procedure
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The Diels-Alder adduct of tropone with 2,3-bis(methoxycarbonyl)-7-oxabicyclohepta-2,5-diene formed homobarrelenone by heating at ca. 130 deg C.Similarly prepared were 1-hydroxy-, 3-methoxy-, 1-chloro-, and 3-chlorohomobarrelenones.High-pressure cycloaddition improved the yields of the Diels-Alder adducts.
- Tian, Guan Rong,Sugiyama, Shigeru,Mori, Akira,Takeshita, Hitoshi
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p. 1557 - 1560
(2007/10/02)
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