[EN] NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, PREPARATION METHOD THEREFOR, INTERMEDIATE THEREOF, AND APPLICATION THEREOF [FR] COMPOSÉ HÉTÉROCYCLIQUE CONTENANT DE L'AZOTE, SON PROCÉDÉ DE PRÉPARATION, INTERMÉDIAIRE DE CELUI-CI ET APPLICATION DE CELUI-CI [ZH] 一种含氮杂环化合物、其制备方法、其中间体及其应用
Pd-Catalyzed Difluoromethylation of Vinyl Bromides, Triflates, Tosylates, and Nonaflates
作者:Dalu Chang、Yang Gu、Qilong Shen
DOI:10.1002/chem.201500551
日期:2015.4.13
Pd‐catalyzed difluoromethylation of di‐, tri‐ or tetra‐substituted vinyl bromides, triflates, tosylates and nonaflates under mild conditions is described. The reaction tolerates a wide range of functional groups, such as bromide, chloride, fluoride, ester, amine, nitrile, and protected carbonyl, thus providing a general route for the preparation of difluoromethylated alkenes.
Preparation of α,β-unsaturated esters and amides via external-CO-free palladium-catalyzed carbonylation of alkenyl tosylates
作者:Tsuyoshi Ueda、Hideyuki Konishi、Kei Manabe
DOI:10.1016/j.tetlet.2012.07.057
日期:2012.9
monoxide nor any pressure-resistant apparatus. A variety of cyclic and acyclic alkenyl tosylates can be converted into the corresponding phenyl esters in good yields. Furthermore, this method is effective for the one-pot synthesis of α,β-unsaturatedamides.
A phosphorylation of alkenyl and aryl C–O bonds at room temperature via photoredox/nickel dual catalysis is reported. By starting from easily available and inexpensive sulfonates, a variety of important alkenyl phosphonates and aryl phosphine oxides are generated in moderate to excellent yields. This method features mild reaction conditions, high selectivity, good functional group tolerance, wide substrate
A quick and flexible synthetic approach to enureas (alkenyl ureas) via the Pd-catalyzed C–N coupling reaction of alkenyl tosylates and mesylates
作者:Jignesh P. Dalvadi、Poojan K. Patel、Kishor H. Chikhalia
DOI:10.1039/c3ra44195d
日期:——
As part of our persistent exploration to elucidate the chemistry of Pd-catalyzed CâN coupling, a catalyst system for the coupling reaction of alkenyl tosylates or mesylates with a variety of ureas has been developed. This catalyst system boasts outstanding functional group tolerance and enables the quick synthesis of the entire series of enurea analogs via Pd-catalyzed CâN coupling reactions in excellent yields.