Tunable <i>P</i>-Chiral Bisdihydrobenzooxaphosphole Ligands for Enantioselective Hydroformylation
作者:Renchang Tan、Xin Zheng、Bo Qu、C. Avery Sader、Keith R. Fandrick、Chris H. Senanayake、Xumu Zhang
DOI:10.1021/acs.orglett.6b01452
日期:2016.7.15
Air-stable and tunable chiral bisdihydrobenzooxaphosphole ligands (BIBOPs) were employed in rhodium-catalyzed asymmetric hydroformylation of various terminal olefins with excellent conversions (>99%), moderate-to-excellent enantioselectivities (up to 95:5 er), and branched to linear ratios (b:l) of up to 400.
Hybrid Palladium Catalyst Assembled from Chiral Phosphoric Acid and Thioamide for Enantioselective β‐C(sp
<sup>3</sup>
)−H Arylation
作者:Hua‐Jie Jiang、Xiu‐Mei Zhong、Zi‐Ye Liu、Rui‐Long Geng、Yang‐Yang Li、Yun‐Dong Wu、Xinhao Zhang、Liu‐Zhu Gong
DOI:10.1002/anie.202004485
日期:2020.7.27
A hybrid palladium catalyst assembled from a chiral phosphoric acid (CPA) and thioamide enables a highly efficient and enantioselective β‐C(sp3)−Hfunctionalization of thioamides (up to 99 % yield, 97 % ee ). A kinetic resolution of unsymmetrical thioamides by intermolecular C(sp3)−H arylation can be achieved with high s‐factors. Mechanistic investigations have revealed that stereocontrol is achieved