Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 351, Issue 17, Pages 2822-2826Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200900544
Keywords
asymmetric catalysis; cycloadditions; dihydrocoumarins; ketenes; N-heterocyclic carbenes
Categories
Funding
- National Natural Science Foundation of China [20602036, 20872143]
- Ministry of Science and Technology of China [2009ZX09501-018]
- Chinese Academy of Sciences
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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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