Proton tautomerism and stereoisomerism in isomeric 4-(metoxyphenyl)amino-1,3-thiazol-2(5H)-one derivatives: Synthesis, crystal structure and spectroscopic studies
作者:Andrii Pyrih、Andrzej Łapiński、Sylwia Zięba、Adam Mizera、Roman Lesyk、Andrzej K. Gzella、Mariusz Jaskolski
DOI:10.1016/j.molstruc.2023.136748
日期:2024.1
3-thiazol-2(5H)-one derivatives. The work concerns the synthesis, analysis of 1H and 13C NMR and FT-IR spectra, and X-ray crystal studies of three isomeric compounds, i.e. 5-dimethylaminomethylidene-4-(o-,m-,p-methoxyphenyl)amino-1,3-thiazol-2(5H)-ones. All three isomers were found to solely exist in the amino tautomeric form, both in the DMSO solution and the solid phase. In the molecules of all the title
在本文中,我们报道了苯环取代基对4-苯氨基-1,3-噻唑-2(5 H)-酮衍生物质子互变异构和立体异构影响的系统研究的最新结果。该工作涉及三种异构体化合物的合成、1 H 和13 C NMR 和 FT-IR 光谱分析以及 X 射线晶体研究,即 5-二甲基氨基亚甲基-4-(邻、间、对甲氧基苯基)氨基-1,3-噻唑-2(5 H )-酮。发现所有三种异构体仅以氨基互变异构形式存在,无论是在 DMSO 溶液还是固相中。所有标题化合物的分子中,o-、m-、对甲氧基苯胺残基相对于噻唑酮体系具有共平面配置,而5-二甲氨基亚甲基残基采用Z构型。DFT 计算正确预测了所有研究材料都倾向于共平面排列