Highly Enantio‐ and Diastereoselective Hydrogenation of Cyclic Tetra‐Substituted β‐Enamido Phosphorus Derivatives
作者:Jun‐Hao Zhang、Hui Xu、Xiaodong Tang、Yanfeng Dang、Fa‐Guang Zhang、Jun‐An Ma
DOI:10.1002/anie.202305315
日期:2023.7.10
A highly enantio- and diastereoselectivehydrogenation of congested tetra-substituted β-enamido phosphorus derivatives was developed by employing commercially available Rh-Josiphos as the catalyst. This protocol offers a straightforward entry to a broad variety of previously difficult-to-access chiral β-amino phosphonates/phosphine oxides bearing two vicinal stereocenters embedded in various ring structures
Palladium-catalyzed alkenyl C–H bond sulfonylation reaction using organosulfonyl chlorides
作者:Yun-He Xu、Min Wang、Ping Lu、Teck-Peng Loh
DOI:10.1016/j.tet.2013.01.071
日期:2013.6
A Pd-catalyzed alkenyl C-H bond direct sulfonylation of vinyl pyridine and enamides was developed. Various arylsulfonyl chlorides were tested in this reaction and the desired products were obtained in good yields. Moreover, the alkyl sulfonyl chloride could also be used though the yield was lower. A possible Pd(II)/Pd(IV) catalytic pathway involved in this coupling reaction was proposed. (C) 2013 Elsevier Ltd. All rights reserved.