d-Glucose has been identified as an efficient C1 synthon in the synthesis of benzimidazoles from o-phenylenediamines via an oxidative cyclization strategy. Isotopic studies with 13C6-d-glucose and D2O unambiguously confirmed the source of methine. The notable features of this method include the following: broad functional group tolerance, a biorenewable methine source, excellent reaction yields, a
d-葡萄糖已被确定为通过氧化环化策略由邻苯二胺合成苯并咪唑的有效C1合成子。用13 C 6 - d-葡萄糖和D 2 O进行的同位素研究明确证实了次甲基的来源。该方法的显着特征包括:宽泛的官能团耐受性,可生物再生的次甲基来源,优异的反应收率,较短的反应时间,水作为环境友好的溶剂以及以克为单位的维生素B 12组分的合成。
Synthesis of 1-Substituted Benzimidazoles from<i>o</i>-Bromophenyl Isocyanide and Amines
In the synthesized compounds, the molecular structures of compounds 1-(2-methylbenzyl)-3-(2,3,4,5,6-pentafluorobenzyl)benzimidazolium bromide (1b), 1-(4-methylbenzyl)-3-(2,3,4,5,6-pentafluorobenzyl)benzimidazolium bromide (1d) and 1-(4-trifluoromethylbenzyl)-3-(2,3,4,5,6-pentafluorobenzyl)benzimidazolium bromide (1f) were enlightened by single crystal X-ray diffraction studies. After enzyme inhibition
这项工作包含五氟苄基取代的苯并咪唑盐的合成和表征,这些盐是N-杂环卡宾 (NHC) 前体。通过使用1 H、13 C 和19 F NMR、FT-IR 光谱和元素分析技术对所有化合物进行了表征。所有光谱和元素分析数据完全证实了所提出的公式。在合成的化合物中,化合物1-(2-甲基苄基)-3-(2,3,4,5,6-五氟苄基)苯并咪唑溴化物( 1b )、1-(4-甲基苄基)-3-( 2,3,4,5,6-五氟苄基)苯并咪唑溴化物(1d)和1-(4-三氟甲基苄基)-3-(2,3,4,5,6-五氟苄基)苯并咪唑溴化物(1f ) 受到单晶 X 射线衍射研究的启发。经过酶抑制研究,一系列新的五氟苄基取代的 NHC 前体被确定为乙酰胆碱酯酶 (AChE) 酶和碳酸酐酶 (hCA) 同工酶的高效抑制剂。基_发现 AChE 的值在 7.20±1.31 至 28.26±5.72 nM 的范围内,对于 hCA I 作为
作者:Khizar Hayat、Mahwish Shkeel、Muhammad Adnan Iqbal、Ching Kheng Quah、Qin Ai Wong、Mansoureh Nazari V、Mohd. B. Khadeer Ahamed、Shahid Hameed
DOI:10.1016/j.jorganchem.2022.122593
日期:2023.2
ligands, was carried out by simple, facile and high yielding method. Respective Se-NHC compounds 3–4 were synthesized in water at 100 °C in open air environment using elemental selenium as reactant. Various spectroscopic methods (FT-IR, 1H and 13C NMR) were used for characterization of the products. Single crystal of salt 2 was analyzed by x-rays crystallographic analysis. In-vitro anticancer studies
for producing 4-trifluoromethoxybenzyl substituted benzimidazolium salts is described in this article. The method is based on the reaction of 4-trifluoromethoxybenzyl substituent alkylating agent with 1-alkylbenzimidazole. This method yielded 1-(4-trifluoromethoxybenzyl)-3-alkylbenzimidazolium bromide salts. These benzimidazolium salts were characterized by using 1H-NMR, 13C-NMR, FT-IR spectroscopy,