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A Palladium-Catalyzed Formal (4+1) Annulation: A New Approach to Cyclopentene Construction
被引:18
|作者:
Widenhoefer, Ross A.
[1
]
机构:
[1] Duke Univ, Dept Chem, Durham, NC 27708 USA
关键词:
annulation;
cycloaddition;
cyclopentenes;
homogeneous catalysis;
palladium;
ALPHA;
BETA-UNSATURATED CARBONYL-COMPOUNDS;
HIGHLY SUBSTITUTED CYCLOPENTENONES;
BETA-KETO-ESTERS;
STEREOSELECTIVE-SYNTHESIS;
CYCLOADDITION;
REARRANGEMENT;
CYCLIZATION;
ROUTE;
D O I:
10.1002/anie.200902404
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Juggling rings: A novel two-step procedure achieves the formal (4+1) annulation of a conjugated diene with a β-keto ester to form a functionalized cyclopentene in good yield under mild conditions. The transformation involves a palladium-catalyzed intramolecular oxidative cyclopropanation of an ε-dienyl β-keto ester followed by magnesium iodide mediated rearrangement of the resulting vinyl cyclopropane. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
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页码:6950 / 6952
页数:3
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