The direct C(sp2)-H functionalization and coupling of aromatic N-heterocycles with (hetero)aryl bromides by [PdX2(imidazolidin-2-ylidene)(Py)] catalysts
In this study, a series of air- and moisture-stable imidazolidin-2-ylidene-based new palladiumcomplexes with the general formula [PdX2(NHC)(Py)] were synthesized (NHC = N-heterocyclic carbene, Py = pyridine, X = Cl or I). The structures of the palladiumcomplexes were characterized by different techniques such as 1H NMR, 13C NMR, FT-IR spectroscopy and elemental analysis. The more detailed structural
本研究合成了一系列空气和湿气稳定的咪唑啉-2-亚基新型钯配合物,通式为[PdX 2 (NHC)(Py)](NHC = N-杂环卡宾,Py = 吡啶, X = Cl 或 I)。钯配合物的结构通过1 H NMR、13C NMR、FT-IR光谱和元素分析。通过单晶 X 射线衍射研究确定了一种钯配合物的更详细的结构特征。所有钯配合物的催化活性在五元芳族 N-杂环如 3,5-二甲基异恶唑和 1-甲基-1H-吡咯-2-甲醛与(杂)芳基溴化物存在 1 120 °C 时的 mol% 催化剂负载量。以中等至良好的产率获得了所需的产品。
Synthesis of novel tetrahydroimidazole derivatives and studies for their biological properties
作者:Vibha Sharma、M.S.Y Khan
DOI:10.1016/s0223-5234(01)01256-9
日期:2001.8
Ethylenediamine was reacted with suitable aromatic aldehydes in order to prepare their respective diSchiff bases. These compounds were then reduced to give the corresponding tetrahydrodiSchiff bases, which were low melting in nature. Finally, these derivatives were condensed with different aromatic aldehydes to give the desired tetrahydroimidazoles. The structures of all these compounds were established on the basis of spectral data. These novel tetrahydroimidazoles showed promising anti-inflammatory and analgesic activity. The compounds were also screened for their anti-bacterial property against Staphylococcus aureus and Escherichia coli. (C) 2001 Editions scientifiques et medicales Elsevier SAS.
Crystal structure, optical properties, spectroscopic characterization and density functional theory studies of a new rhodium(i)-imidazolidin-2-ylidene complexes: Synthesis, characterization and cytotoxic properties