Polyethylene Glycol (PEG-400) as Methylene Spacer and Green Solvent for the Synthesis of Heterodiarylmethanes under Metal-Free Conditions
作者:Rahul Kumar、Deepa Rawat、Subbarayappa Adimurthy
DOI:10.1002/ejoc.202000467
日期:2020.6.23
protocol for the direct synthesis of heterodiarylmethanes employing polyethylene glycol (PEG‐400) as methylene spacer under metal‐free conditions. The method is applicable to heterocycles such as imidazopyridines, imidazothioazoles, imidazobenzothiozoles, indolizines, indole, 1‐methyl‐1H‐indole, N,N‐dimethylaniline, and trimethoxybenzene; (diacetoxyiodo)benzene (PIDA) is used as oxidant.
我们开发了一种新颖有效的协议,用于在无金属条件下使用聚乙二醇(PEG-400)作为亚甲基间隔基直接合成杂二芳基甲烷。该方法适用于杂环,如咪唑并吡啶,咪唑并噻唑,咪唑并苯并噻唑,吲哚嗪,吲哚,1-甲基-1H-吲哚,N,N-二甲基苯胺和三甲氧基苯; (二乙酰氧基碘)苯(PIDA)用作氧化剂。