C–H sulfidation or selenation of arenes by a Pd(II)/Cu(II) catalytic system: Preparation of unsymmetrical sulfides or selenides by C–H functionalization has been disclosed. This protocol could be applied a various of arenes. In the case of using an indolizine and pentafluorobenzene, bis‐sulfidated product were obtained.
Copper-Catalyzed Formal Dehydrogenative Coupling of Carbonyls with Polyfluoroarenes Leading to β-C–H Arylation
作者:Weilong Xie、Dongwook Kim、Sukbok Chang
DOI:10.1021/jacs.0c10904
日期:2020.12.9
We herein communicate a formal dehydrogenativecoupling of carbonyls with polyfluoroarenes enabled by Cu catalysis. Silyl enol ethers initially prepared from carbonyls are postulated to undergo the copper-mediated oxidative dehydrogenativecoupling with polyfluoroarenes via a radicalpathway. Including cyclic and linear ketones, aldehydes, and esters, a broad range of β-aryl carbonyl products were
我们在此交流了通过 Cu 催化实现的羰基与多氟芳烃的正式脱氢偶联。假设最初由羰基化合物制备的甲硅烷基烯醇醚通过自由基途径与多氟芳烃进行铜介导的氧化脱氢偶联。包括环状和线性酮、醛和酯在内,以高区域和立体选择性和优异的官能团耐受性有效地获得了广泛的 β-芳基羰基产物。
The thiolate anion as a nucleophile Part XII. Reactions of Lead(II) Benzenethiolate
作者:Michael E. Peach、Kevin C. Smith
DOI:10.1016/s0022-1139(00)80902-1
日期:1985.1
The reactions of various fluoroaromatics, C6F6−xHx, and C6F5X (X = C6F6, Cl, Me, NO2, CF3, COCl, CH2Br, OMe, and NH2) with lead(II) benzenethiolate in DMF have been examined. Lead thiolate acted as an excellent source of benzenethiolate anions and displacement of fluorine, chlorine or the nitro group was observed. The new products have been characterized by elemental analysis, and NMR (H−1 and F−19)
各种氟代芳烃,C 6 F 6-x H x和C 6 F 5 X(X = C 6 F 6,Cl,Me,NO 2,CF 3,COCl,CH 2 Br,OMe和NH 2的反应)中已检测了DMF中的苯硫醇铅(II)。硫醇铅是苯硫醇根阴离子的极好来源,并观察到了氟,氯或硝基的置换。这些新产品已通过元素分析,NMR(H-1和F-19),红外和质谱进行了表征。
The thiolate anion as a nucleophile. Part XIII. Reactions of some tin(II) aromatic thiolates
作者:Rosemary C. Hynes、Michael E. Peach
DOI:10.1016/s0022-1139(00)80528-x
日期:1986.3
The reactions of tin(II) benzenethiolate and p-toluenethiolate with various fluoroaromatics in DMF have been studied. Replacement of some of the aromatic fluorines by the thiolate group was observed. The tin(II) aromatic thiolates are comparable in reactivity in these reactions with lead(II) benzenethiolate. All new compounds have been characterized by elemental analysis, and NMR (H-1 and F-19) and
RhH(PPh3)4 and 1,2-bis(diphenylphosphino)benzene (dppBz) catalyze the aryl exchange reaction of polyfluorinated diaryl sulfides. By employing these catalysts, unsymmetrical polyfluorinated diaryl sulfides are synthesized by the reaction of symmetrical polyfluorinated diaryl sulfides and substitutedpentafluorobenzenes in the presence of triisopropylsilane.