作者:D.S. Kemp
DOI:10.1016/0040-4020(67)80035-8
日期:1967.5
internal elimination to form a transitory N-ethylbenzoketoketenimine. Alternative pathways involving benzoisoxazolines have been excluded by kinetic evidence and by study of the model substance, 2-ethylbenzo-4-isoxazoline. A competition study has shown that the intermediate benzoketoketenimine exhibits high selectivity in many of its combination reactions, and that for aqueous acetic acid in the pH
N-乙基苯并恶唑鎓阳离子已显示出易于进行常规碱催化的内部消除,从而形成瞬时的N-乙基苯甲酮基亚胺。动力学证据和对模型物质2-乙基苯并-4-异恶唑啉的研究已排除了涉及苯并异恶唑啉的其他途径。竞争研究表明,中间体苯并酮丁宁在许多组合反应中均具有很高的选择性,而对于pH范围为2–5的乙酸水溶液,反应性亲核试剂最有可能是水和乙酸根离子。