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Asymmetric Synthesis of Spiro-3,4-dihydropyrans via a Domino Organocatalytic Sequence
被引:56
|作者:
Yao, Weijun
[1
]
Pan, Lianjie
[1
]
Wu, Yihua
[1
]
Ma, Cheng
[1
]
机构:
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
基金:
中国国家自然科学基金;
关键词:
DIELS-ALDER REACTIONS;
CATALYTIC ENANTIOSELECTIVE CONSTRUCTION;
CARBON QUATERNARY STEREOCENTERS;
MICHAEL-ALDOL REACTIONS;
CONJUGATE ADDITION;
NONADJACENT STEREOCENTERS;
CINCHONA ALKALOIDS;
NATURAL-PRODUCTS;
DERIVATIVES;
ACTIVATION;
D O I:
10.1021/ol1007873
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A cinchona alkaloid-catalyzed domino Michael/hemiacetalization reaction of cyclic beta-oxo aldehydes and aromatic beta,gamma-unsaturated a-keto esters, resulting in the formation of spiro-dihydropyran architectures in good yield with high stereoselectivity (up to 97% ee), is presented.
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页码:2422 / 2425
页数:4
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