Synthesis, characterization and modeling of stable radical functionalized monothiophenes
作者:M’hamed Chahma、Remi Riopel、Gustavo Arteca
DOI:10.1080/17415993.2021.1909590
日期:2021.7.4
The synthesis, characterization and modeling of two oligothiophenes bearing stable radicals are reported. The radical precursors 2,4-dimethyl-6-(6-(thiophen-2-yl)pyridin-2-yl)-1,2,4,5-tetrazinan-3-one (3) and 2,4-dimethyl-6-(6-(thiophen-3-yl)pyridin-2-yl)-1,2,4,5-tetrazinan-3-one (4) were prepared in a good yield (80–90%) by condensation of the appropriate thiophene-pyridine carboxaldehyde and 2,4
报道了两种带有稳定自由基的低聚噻吩的合成、表征和建模。自由基前体 2,4-二甲基-6-(6-(thiophen-2-yl)pyridin-2-yl)-1,2,4,5-tetrazinan-3-one ( 3 ) 和 2,4-二甲基-6-(6-(thiophen-3-yl)pyridin-2-yl)-1,2,4,5-tetrazinan-3-one ( 4 )合适的噻吩-吡啶甲醛和 2,4-二甲基碳酰肼。在甲醇中使用 1,4-苯醌氧化3和4 分别产生自由基5和6 (6-(3-thienyl)-pyridine-2-(1,5-dimethyl-6-oxoverdazyl))。所有这些新化合物在空气和有机溶剂中都是稳定的。自由基5和6由 EPR 和红外表征,作为证据,前体的羰基拉伸从 1629 cm -1 –1660 cm -1的相应自由基的位移。从头算分子轨道计算和自旋密度用于确定3-6 的电子特性。