Diastereoselective synthesis of novel tetra-and pentacyclic annulated coumarino-δ-sultam pyrrolidine, pyrrolizidine, pyrrolothiazole and isoxazolidine derivatives via intramolecular 1,3-dipolar cycloadditions
作者:Mehdi Ghandi、Nahid Zarezadeh、Alireza Abbasi
DOI:10.1039/c6ra14169b
日期:——
facile and efficient strategy towards the novel tetra- and pentacyclic annulated coumarino-δ-sultam pyrrolidine, pyrrolizidine, pyrrolothiazole and isoxazolidine via intramolecular 1,3-dipolar cycloadditions of nitrones or azomethine ylides is described. These highly functionalized polycyclic scaffolds were obtained with high diastereoselectivity in high yields via condensation of the initially prepared
朝向新颖一种简便,高效的策略四-和五环稠coumarino-δ-磺内酰胺吡咯烷,双吡咯烷,pyrrolothiazole和异恶唑烷经由硝酮或甲亚胺叶立德的分子内1,3-偶极环加成进行说明。通过将最初制备的香豆素基双官能起始原料与肌氨酸或N-苯基甘氨酸,L-脯氨酸或L -4-噻唑烷羧酸以及甲基或苄基羟胺缩合,以高非对映选择性和高收率获得这些高度官能化的多环支架。结构的证明依赖于分析研究和X射线晶体学。