Atom-economical construction of tetracyclic [1,4]oxazepines involving intramolecular arylation of a 2-imidazoline moiety
作者:Kseniya Karamysheva、Elena Reutskaya、Alexander Sapegin、Mikhail Dorogov、Mikhail Krasavin
DOI:10.1016/j.tetlet.2015.08.062
日期:2015.10
Novel [1,4]oxazepines containing a fused imidazoline moiety were synthesized from 2-hydroxyphenyl imidazolines and bis-electrophilic aromatic substrates in a reaction involving sequential nucleophilic aromatic substitution steps and a Smiles rearrangement. A notable step was the remarkably facile, metal-free intramolecular N-arylation of the imidazoline moiety with a fluoro-, nitro- or chloroaromatic
由2-羟基苯基咪唑啉和双亲电子芳族底物在涉及顺序亲核芳族取代步骤和Smiles重排的反应中合成了新型的含稠合咪唑啉部分的[1,4]氧杂ze庚因。值得注意的步骤是咪唑啉部分与氟,硝基或氯代芳族或杂芳族环的非常容易的,无金属的分子内N-芳基化。本信中提出的方法不仅详述了获得新的,医学上相关的四环[1,4]氧杂氮杂核的途径,而且扩展了咪唑啉芳基化化学反应的范围。