作者:Bi-Shun Zeng、Xinyi Yu、Paul W. Siu、Karl A. Scheidt
DOI:10.1039/c4sc00423j
日期:——
An enantioselective Pd-catalyzed 6-endo-trig reaction for the synthesis of 2-aryl-chromenes has been developed. A systematic optimization of a TADDOL-derived ligand set resulted in the identification of a novel monodentate phosphoramidite–palladium catalyst that accesses 2-aryl-2H-chromenes with high yield and enantioselectivity under mild conditions. The products obtained from this method can be transformed into biologically active compounds through functionalization of the chromene alkene.
已开发出一种以Pd为催化剂的手性选择性6-内环三元反应,用于合成2-芳基色烯。对TADDOL衍生的配体体系进行了系统优化,确定了一种新型的单齿膦酰胺–钯催化剂,在温和条件下能够高效合成高产率和高手性选择性的2-芳基-2H-色烯。通过对色烯烯烃进行功能化,可以将该方法获得的产物转化为具有生物活性的化合物。