One-Pot Acid-Catalyzed Ring-Opening/Cyclization/Oxidation of Aziridines with <i>N</i>-Tosylhydrazones: Access to 1,2,4-Triazines
作者:Lorène Crespin、Lorenzo Biancalana、Tobias Morack、David C. Blakemore、Steven V. Ley
DOI:10.1021/acs.orglett.7b00101
日期:2017.3.3
described. The process involves an efficient nucleophilic ring opening of the aziridine, giving access to a wide range of aminohydrazones, isolated with excellent yields. A “one-pot” procedure, combining the ring opening with a cyclization and an oxidation step, allows the preparation of diversified triazines in good yields.
描述了用于N-甲苯磺酰基d和氮丙啶区域选择性转化为3,6-二取代和3,5,6-三取代的1,2,4-三嗪的新的三步式伸缩反应序列。该方法涉及氮丙啶的有效亲核开环,从而获得了以优异收率分离的各种氨基hydr。“一锅法”程序将开环与环化和氧化步骤结合在一起,可以高收率制备多样化的三嗪。