Evaluation of<i>N</i>-hydroxymethylphthalimide in alkaline medium: Novel entry to the tricyclic [1,3]oxazepine core<i>via</i>an intramolecular π and<i>O</i>-cationic cyclization
作者:Armelle Cul、Anthony Pesquet、Adam Daïch、Abderrahim Chihab-Eddine、Štefan Marchalín
DOI:10.1002/jhet.5570400314
日期:2003.5
isoindolo[1,3]benzo(or thieno)oxazepines 8a,b and one of their positional isomers aromatic tricyclic N,O-acetals 13b are reported to occur efficiently in a three-step sequence from N-hydroxy-methylphthalimide (6). The key step of this methodology is the intramolecular arylation of an endocyclic and/or exocyclic N-acyliminium cation. The mechanism leading to these species, in particular to a tricyclic lactam
据报道,熔融的异吲哚并[1,3]苯并(或噻吩)恶氮杂ze烷8a,b及其位置异构体之一是芳香族三环N,O-缩醛13b以三步顺序有效地从N-羟基-甲基邻苯二甲酰亚胺发生(6)。该方法的关键步骤是环内和/或环外N-酰亚胺阳离子的分子内芳基化。讨论了导致这些物种,特别是导致三环内酰胺13b的机理。