The bis-1,4-dimesityl-1,2,3-triazol-5-ylidene–palladium complex (1a) successfully catalyzes the Mizoroki–Heck and Sonogashira coupling reactions with aryl bromides to give the corresponding alkenes and alkynes, respectively, in good to excellent yields. In the Mizoroki–Heck reaction, electron-rich, electron-poor, and functionalized aryl bromides and alkenes are tolerated, while the substrates are limited
A copper-catalyzedcross-dehydrogenativeC–H/N–H coupling has been devised to access a series of N-arylated sulfoximines in high yield from 8-aminoquinoline-derived benzamides and sulfoximines. The reaction is scalable, and mechanistic studies favor the involvement of an organometallic pathway, where C–H bond cleavage is presumed to be the kinetically relevant step. The utility of sulfoximine-coupled
Synthesis, crystal structure, and catalytic activity of bridged-bis(N-heterocyclic carbene) palladium(II) complexes in selective Mizoroki-Heck cross-coupling reactions
作者:Waseem Mansour、Rami Suleiman、Wissam Iali、Mohammed Fettouhi、Bassam El Ali
DOI:10.1016/j.poly.2021.115371
日期:2021.10
temperature range 25–120 °C. The catalyticactivities of three Pd-bridged bis(NHC) complexes in the Mizoroki-Heck cross-couplingreactions were not found to have a direct correlation with +I effect order of the N-substituents of the ligand. However, a direct correlation was found between the DFT calculated absolute softness of the three complexes with their respective catalyticactivity. The highest calculated