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Enantioselective Synthesis of Dihydrocoumarins via N-Heterocyclic Carbene-Catalyzed Cycloaddition of Ketenes and o-Quinone Methides
被引:149
|作者:
Lv, Hui
[1
]
You, Lin
[1
]
Ye, Song
[1
]
机构:
[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Recognit & Funct, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
基金:
中国国家自然科学基金;
关键词:
asymmetric catalysis;
cycloadditions;
dihydrocoumarins;
ketenes;
N-heterocyclic carbenes;
BAYLIS-HILLMAN REACTION;
NUCLEOPHILIC CARBENES;
GAMMA-BUTYROLACTONES;
ACID;
3,4-DIHYDROCOUMARINS;
DERIVATIVES;
COUMARINS;
ALDEHYDES;
ORGANOCATALYSIS;
HYDROARYLATION;
D O I:
10.1002/adsc.200900544
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
Chiral N-heterocyclic carbenes were found to be efficient catalysts for the formal [4+2] cycloaddition reaction of alky(aryl)ketenes and o-quinone methides to give the corresponding 3,3,4-trisubstituted 3,4-dihydrocoumarins in good yields with good diastereoselectivities and excellent enantioselectivities.
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页码:2822 / 2826
页数:5
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