Functionalization of Styrenes by Copper-Catalyzed Borylation/<i>ortho</i>-Cyanation and Silver-Catalyzed Annulation Processes
作者:Wanxiang Zhao、John Montgomery
DOI:10.1002/anie.201507303
日期:2015.10.19
N‐cyano‐N‐phenyl‐p‐methylbenzenesulfonamide (NCTS) to a broad range of styrenes by utilizing IMesCuCl as catalyst. This step simultaneously accomplishes hydroboration of the alkene and ortho cyanation of the benzene unit. The products thus obtained are further functionalized by a AgNO3/Selectfluor‐mediated coupling of the BPin and cyano functionalities to annulate a new five‐membered ring. This combined two‐step
PPh3-Promoted Direct Deoxygenation of Epoxides to Alkenes
作者:Dawei Cao、Shumei Xia、Lijuan Li、Huiying Zeng、Chao-Jun Li
DOI:10.1021/acs.orglett.4c02207
日期:2024.8.2
applicability. Herein, we report an efficient PPh3-promoted metal-free strategy for deoxygenation of epoxides to generate alkene derivatives. The success of deoxyalkenylation of epoxides bearing a wide range of functional groups to give terminal, 1,1-disubstituted, and 1,2-disubstituted alkenes manifests the powerfulness and versatility of this strategy. Moreover, gram-scale synthesis with excellent yield and