AgSbF6-controlled diastereodivergence in alkyne hydroarylation: facile access to Z- and E-alkenyl arenes
作者:Minsik Min、Donghee Kim、Sungwoo Hong
DOI:10.1039/c4cc03602f
日期:——
AgSbF6-controlled diastereodivergent hydroarylation reactions were developed. Unprecedented and remarkable switching of the E/Z-stereoselectivity could be obtained by adjusting the AgSbF6 loading.
Herein, a rhodium(III)-catalyzedoxidative C–H activation of simple arylphosphonates and phosphonamides with subsequent coupling with alkenes (olefination), internal alkynes (hydroarylation and oxidative cyclization), or simple arenes to give access to diverse P-containing functional frameworks is reported.
Oxidative Phosphonylation of Aromatics with Ammonium Cerium(IV) Nitrate Arylphosphonates 5 and 6 can be prepared in good yields in a one-step synthesis starting from arenes with tri- or diethylphosphites and cerium ammonium nitrate (CAN) as oxidant. The selectivity of the oxidative phosphonylation is relatively low; the reactive species is a phosphite radical cation.
Rhodium(iii)-catalyzed ortho-olefination of aryl phosphonates
作者:Bathoju Chandra Chary、Sunggak Kim
DOI:10.1039/c3ob41548a
日期:——
Rhodium(III)-catalyzed C–H olefination of aryl phosphonic esters is reported for the first time. In this mild and efficient process, the phosphonic ester group is utilized successfully as a new directing group. In addition, mono-olefination for aryl phosphonates is observed using a phosphonic diamide directing group.
Palladium-Catalyzed Desulfitative Cross-Coupling Reaction of Sodium Arylsulfinates with H-Phosphonate Diesters
作者:Tao Miao、Lei Wang
DOI:10.1002/adsc.201300983
日期:2014.3.24
A novel and convenient palladium‐catalyzed cross‐coupling reaction of H‐phosphonate diesters with sodiumarylsulfinates was developed via desulfitation in the presence of silver carbonate and tetra‐butylammonium chloride. This method is highly efficient and provides a rapid access to a broad spectrum of arylphosphonate diesters in good to excellent yields.