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.
We describe the direct synthesis of organophosphorus compounds from ubiquitous aryl and vinyl carboxylic acids via decarbonylative palladium catalysis. The catalytic system shows excellent scope and tolerates a wide range of functional groups (>50 examples). The utility of this powerful methodology is highlighted in the late-stage derivatization directly exploiting the presence of the prevalent carboxylic
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.
Ni-catalyzed construction of C–P bonds from electron-deficient phenols via the in situ aryl C–O activation by PyBroP
作者:Yu-Long Zhao、Guo-Jie Wu、Fu-She Han
DOI:10.1039/c2cc31718d
日期:——
The CâP bond forming reaction using electron-deficient phenol substrates was considerably challenging. Herein, we present a new protocol that allows for one-pot construction of CâP bonds via the cross-coupling of phenols and phosphine oxide or phosphite in the presence of a nickel catalyst.