Experimental and theoretical studies on the synthesis of 1,4,5-trisubstituted pyrrolidine-2,3-diones
作者:Nguyen Tran Nguyen、Vo Viet Dai、Nguyen Ngoc Tri、Luc Van Meervelt、Nguyen Tien Trung、Wim Dehaen
DOI:10.3762/bjoc.18.118
日期:——
Substituted 4-acetyl-3-hydroxy-3-pyrroline-2-ones have been prepared via three-component reactions and the tautomerism of these 3-pyrroline-2-ones is due to the slight difference of energy, and the significantly large rate constant of transformation between two tautomers. 1,4,5-Trisubstituted pyrrolidine-2,3-dione derivatives were prepared from the above mentioned 2-pyrrolidinone derivatives and aliphatic
通过三组分反应制备了取代的4-乙酰基-3-羟基-3-吡咯啉-2-酮,这些3-吡咯啉-2-酮的互变异构是由于能量的微小差异和显着大的速率两个互变异构体之间的转化常数。由上述2-吡咯烷酮衍生物和脂肪胺制备1,4,5-三取代吡咯烷-2,3-二酮衍生物,其以烯胺形式存在并通过分子内氢键稳定。根据计算结果提出了3-吡咯啉-2-酮与脂肪胺(CH 3 NH 2 )之间可能的反应机理,并且主要产物在气相中通过最低ΔG #途径沿着PES顺利形成和乙醇溶剂模型。 DFT计算表明,对于形成主要产物,动力学选择性比热力学选择性更重要。