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2005
Cyclopentane derivatives
Q 0030
Efficient Synthesis of Functionalized 4-Hydroxycyclopent-2-en-1-ones by Cyclizaof 1,3-Bis(silyl) Enol Ethers and 1,3-Dicarbonyl Dianions with 1,2-Diketones.
20- 063 tion
— Two cyclization methods of enolizable 1,2-diketones with either 1,3-bis(silyl) enol
ethers or 1,3-dicarbonyl dianions are investigated. Both versions allow the chemoselective synthesis of a variety of functionalized 4-hydroxycyclopentenones. Similar
yields are obtained for the reaction of diketones with dianions or bis(silyl) enol ethers
derived from simple β-keto esters (to be continued). — (HOLTZ, E.; KOEHLER, V.;
APPEL, B.; LANGER*, P.; Eur. J. Org. Chem. 2005, 3, 532-pp; Inst. Chem.
Biochem., Ernst-Moritz-Arndt-Univ., D-17487 Greifswald, Germany; Eng.) —
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