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Poly(methylhydrosiloxane)-supported chiral imidazolinones: new versatile, highly efficient and recyclable organocatalysts for stereoselective Diels-Alder cycloaddition reactions
被引:50
|作者:
Guizzetti, Stefania
[1
]
Benaglia, Maurizio
[1
]
Siegel, Jay S.
[2
]
机构:
[1] Univ Milan, Dipartimento Chim Organ & Ind, I-20133 Milan, Italy
[2] Univ Zurich, Inst Organ Chem, CH-8057 Zurich, Switzerland
关键词:
ORGANIC CATALYSIS;
IMIDAZOLIDIN-4-ONE;
IMMOBILIZATION;
STRATEGIES;
D O I:
10.1039/c2cc17919a
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Poly(methylhydrosiloxane) (PMHS) supported organic catalysts promoted the Diels-Alder reaction of dienes with alpha,beta-unsaturated aldehydes, also in pure water, in yields and enantiomeric excesses comparable to those observed with the non-supported catalysts (up to 93% ee). Recycling of the catalysts was performed with no loss of enantioselectivity for at least five reaction cycles.
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页码:3188 / 3190
页数:3
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