N-heterocyclic carbene-catalyzed [4 + 2] cycloaddition of ketenes and 3-aroylcoumarins: highly enantioselective synthesis of dihydrocoumarin-fused dihydropyranones
作者:Teng-Yue Jian、Xiang-Yu Chen、Li-Hui Sun、Song Ye
DOI:10.1039/c2ob26804c
日期:——
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 enantioselectivity.
的Ñ烯酮和3- aroylcoumarins的-杂环卡宾-催化的[4 + 2]环化已经发展得到高产率具有良好的非对映选择性和高对映选择性对应的二氢香豆素-稠合多取代dihydropyranones。