N-heterocyclic carbene-catalyzed [4 + 2] cycloaddition of ketenes and 3-aroylcoumarins: Highly enantioselective synthesis of dihydrocoumarin-fused dihydropyranones
The N-heterocyclic carbene-catalyzed [4 + 2] cyclization of ketenes and 3-aroylcoumarins has been developed to give the corresponding dihydrocoumarin-fused multisubstituted dihydropyranones in high yield with good diastereoselectivity and high enantiosele
Jian, Teng-Yue,Chen, Xiang-Yu,Sun, Li-Hui,Ye, Song
p. 158 - 163
(2013/02/23)
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