Insights into Regioselective Oxy (−O−) and Imino (−NH−) Group Insertions of 3-Nortricyclanone
作者:Murray G. Rosenberg、Ulrike Haslinger、Udo H. Brinker
DOI:10.1021/jo0159587
日期:2002.1.1
rile (15), lactam (16a), and novel hydroxycarbonitriles 19-21 were selectively formed when 3-nortricyclanone (1) was treated with aqueous hydroxylamine-O-sulfonic acid (HOSA). Since nitrile 15 neither hydrolyzed nor underwent intramolecular Ritter reaction under these conditions, mechanisms involving Beckmann rearrangement of 3 to nitrilium ion 9 (normal) and Beckmann fragmentation of 3 to cation 8
内酰胺4-氮杂三环[3.2.1.0(2,7)]辛烷-3-酮(16a)已证明是在先前报道的声称形成内酰胺3-氮杂三环[3.2.1.0(2,7)]的反应中形成的。 octan-4-one(17a)。在相关的反应中,用3-nortricyclanone(1)处理三环[3.1.0]己-2-烯-内-6-腈(15),内酰胺(16a)和新型羟基腈19-21选择性地形成。羟胺-O-磺酸水溶液(HOSA)。由于在这些条件下腈15既不水解也不进行分子内Ritter反应,因此使用半经验计算研究了涉及3到3离子的贝克曼重排(正常)和3到阳离子8的贝克曼碎裂(异常)的机理。当使用碱性HOSA时,内酰胺16a和17a可能以1:2的比例形成,可能是通过恶二氮杂6a形成的。使用NH(3)/ NaOCl试剂溶液观察到相似的选择性,除两种内酰胺外,它还提供内酯4-氧杂三环[3.2.1.0(2,7)] octan-3-one(