Asymmetric Hydrogenation of In Situ Generated Isochromenylium Intermediates by Copper/Ruthenium Tandem Catalysis
作者:Tingting Miao、Zi-You Tian、Yan-Mei He、Fei Chen、Ya Chen、Zhi-Xiang Yu、Qing-Hua Fan
DOI:10.1002/anie.201611291
日期:2017.4.3
The first asymmetrichydrogenation of in situgeneratedisochromenylium derivatives is enabled by tandemcatalysis with a binary system consisting of Cu(OTf)2 and a chiral cationic ruthenium–diamine complex. A range of chiral 1H‐isochromenes were obtained in high yields with good to excellent enantioselectivity. These chiral 1H‐isochromenes could be easily transformed into isochromanes, which represent