作者:A. V. Samet、K. A. Kislyi、V. N. Marshalkin、Yu. A. Strelenko、Yu. V. Nelyubina、K. A. Lyssenko、V. V. Semenova
DOI:10.1007/s11172-007-0325-4
日期:2007.10
1,3-Dinitro[b, f][1,4]dibenzoxazepin-11(10H)-one enters nucleophilic substitution reactions with N-nucleophiles, azide ion preferably replacing the nitro group in position 3, whereas amines the one in position 1. Structures of the substitution products were confirmed by X-ray diffraction and 1H NMR NOE spectroscopy. The selectivity observed in the reaction with amines was supposed to be caused by the stabilization of the intermediate σ-complex with the NH…O intramolecular hydrogen bond.
1,3-二硝基[b,f][1,4]二苯并氧氮杂卓-11(10H)-酮与 N-亲核物发生亲核取代反应,叠氮离子最好取代第 3 位的硝基,而胺则取代第 1 位的硝基。X 射线衍射和 1H NMR NOE 光谱证实了取代产物的结构。在与胺反应中观察到的选择性应该是由于中间体 σ-复合物与 NH...O 分子内氢键的稳定作用造成的。