Palladium(II) Complexes of N-Heterocyclic Carbene Amidates Derived from Chalcogenated Acetamide-Functionalized 1<i>H</i>-Benzimidazolium Salts: Recyclable Catalyst for Regioselective Arylation of Imidazoles under Aerobic Conditions
作者:Renu Bhaskar、Alpesh K. Sharma、Ajai K. Singh
DOI:10.1021/acs.organomet.8b00246
日期:2018.8.27
[1-(CH2C(O)NH(CH2)2S/SePh)-3-R-C7H5N2]+ X̅ (L1–L4; R = Me, CH2Ph; X = Br, I) to C,N̅,S/Se ligands were synthesized by reaction of 1H-benzimidazole with 2-bromo-N-(2-phenylthio/seleno)ethyl)acetamide (A1/A2), followed by treatment with methyl/benzyl bromide/iodide. The reaction of L1–L4 with Ag2O followed by treatment with [Pd(CH3CN)2Cl2] resulted in complexes [Pd(C,N̅,E)Cl] (C1–C4), where the C,N–,E pincer
所述chalcogenated乙酰胺官能化的1个ħ -benzimidazolium盐前体[1-(CH 2 C(O)NH(CH 2)2 S / SEPH)-3- RC 7 ħ 5 Ñ 2 ] + X ̅(L1 - L4 ; R = Me,CH 2 Ph; X = Br,I)至C,N̅,S / Se配体通过1 H-苯并咪唑与2-溴-N -(-(2-苯硫基/硒代)乙基)乙酰胺(A1 / A2),然后用甲基/苄基溴/碘化物处理。L1 – L4的反应用Ag 2 O进行处理,然后用[Pd(CH 3 CN)2 Cl 2 ]处理,生成复合物[Pd(C,N̅,E)Cl](C1 - C4),其中C,N –,E钳制配体源自L1-L4。L1 - L4和C1 - C4通过元素分析,HR-MS和1 H,13 C 1 H}和77 Se 1 H} NMR光谱进行了表征。L2和C1 - C3的单晶结构通过X射线衍