作者:C.Dittmer, G. Raabe, L. Hintermann, 题目: Asymmetric Cyclization of 2′-hydroxychalcones to Flavanones: Catalysisby Chiral Brønsted Acids and Bases. 杂志:Eur. J. Org. Chem. 年卷页:2007,35, 5886-5898. 全文链接:http://onlinelibrary.wiley.com/doi/10.1002/ejoc.200700682/abstract