1,3-Dipolar cycloaddition of imidate ylides on imino-alcohols: Synthesis of new imidazolones using solvent free conditions
作者:Jean Michel Lerestif、Jacques Perrocheau、François Tonnard、Jean Pierre Bazureau、Jack Hamelin
DOI:10.1016/0040-4020(95)00321-x
日期:1995.6
Imidates derived from α-amino esters as potential azomethine ylides, undergo 1,3-dipolar cycloaddition with imino-alcohols, in tautomeric equilibrium with 1,3-oxazolidines, without solvent at 70°C or under microwave irradiation. This reaction leads to a wide range of novel polyfunctionalized 4-yliden-2-imidazolin-5-ones in good yields with short reaction times. The reactivity of these imidates derived
在70°C或微波辐射下,与1,3-恶唑烷的互变异构平衡中,衍生自α-氨基酯的亚磺酸盐(作为潜在的甲亚胺基化物)与亚氨基醇进行1,3-偶极环加成反应,与1,3-恶唑烷呈互变异构平衡。该反应以短的反应时间以良好的收率产生了多种新型的多官能化的4-yliden-2-imidazolin-5-one。由半经验PM3计算确定的前沿分子轨道(FMO)的能量合理化了这些衍生自α-氨基酯的亚胺与亚氨基醇的反应性:该反应由HOMO (1,3-偶极)相互作用控制) - LUMO (亲偶极)和第二级摄动能量的计算是与实验反应取向一致。