A versatile switching method for N- or O-alkylation of 2-aminophenols using ionic liquids: Selective access to benzo[1,4]oxazine-2-one and benzo[1,4]oxazine-3-one derivatives
作者:Mohammad Shabpiray、Ali Sharifi、M. Saeed Abaee、Moitaba Mirzaei、Nima Ghonouei
DOI:10.1016/j.tetlet.2023.154643
日期:2023.8
A new method is developed for efficient and chemoselective synthesis of benzo[1,4]oxazineone derivatives. By the choice of an appropriate ionic liquid, the process is directed towards selective O- or N-alkylation to give the desired isomeric structures, as the major product of the reaction. In the presence of choline hydroxide, benzo[1,4]oxazine-3-one derivatives are formed, while by using choline
开发了一种高效化学选择性合成苯并[1,4]恶嗪酮衍生物的新方法。通过选择合适的离子液体,该过程针对选择性O-或N-烷基化,得到所需的异构体结构,作为反应的主要产物。在氢氧化胆碱存在下,生成苯并[1,4]恶嗪-3-酮衍生物,而在氟化胆碱存在下,得到相应的苯并[1,4]恶嗪-2-酮。通过原位使用烷基卤化物,可以促进后一种途径用于反应迟缓的反应物。