Experimental and Computational Study of 6-<i>exo</i> and 7-<i>endo</i> Cyclization of Aryl Radicals Followed by Tandem S<sub><i>RN</i></sub>1 Substitution
作者:Lucas E. Peisino、Adriana B. Pierini
DOI:10.1021/jo4001788
日期:2013.5.17
novel substituted 2-acetyl-1,2,3,4-tetrahydroisoquinolines and substituted 2-acetyl-2,3,4,5-tetrahydro-1H-benzo[c]azepines were obtained in good yields. These reactions are proposed to occur through the intermediacy of aryl radicals, which by intramolecular 6-exo or 7-endo attack to a double bond cyclize to give aliphatic radicals, which react along the propagation steps of the SRN1 chain cycle to afford
在亲核试剂Me 3 Sn –,Ph 2 P –和O 2 NCH 2 –的照射下,在液氨中研究了N-烯丙基-N-(2-卤代苄基)-乙酰胺和衍生物的反应。按照该程序,以高收率获得了新颖的取代的2-乙酰基-1,2,3,4-四氢异喹啉和取代的2-乙酰基-2,3,4,5-四氢-1 H-苯并[ c ]氮杂。这些反应被认为是通过芳基自由基的中间发生的,而芳基自由基的发生是通过分子内的6- exo或7- endo攻击双键环化得到脂族基团,这些脂族基团沿着S RN 1链环的传播步骤反应,得到环状取代的化合物作为主要产物。使用DFT方法对反应进行建模,该方法提供了合理的理解,可以将产物分布与作为中间体的脂肪族自由基的结构及其形成的动力学联系起来。