Friedel-Crafts chemistry. Part 40. An expedient novel synthesis of some dibenz-azepines, -azocines, 11H-benzo[f]pyrido[2,3-b]azepines and 6H-benzo[g]pyrido[2,3-c]azocines
作者:Hassan A. K. Abd El-Aal、Ali A. Khalaf
DOI:10.3998/ark.5550190.p008.163
日期:——
A new synthetic approach for the synthesis of novel 5 H-dibenz( b,f )azepine, 5 H-dibenz( b,f )- azocine, 11 H-benzo( f)pyrido(2,3-b)azepine and 6 H-benzo( g)pyrido(2,3-c)azocine derivatives is reported. The key step of this methodology is based on Friedel-Crafts ring closure of nitrogen containing carboxylic acids and alkanols in the presence of AlCl 3, P 2O5 or PPA catalysts in overall high yields
一种合成新型 5 H-二苯(b,f)氮杂、5 H-二苯(b,f)-氮杂、11 H-苯并(f)吡啶并(2,3-b)氮杂和6的新合成方法报道了 H-苯并 (g) 吡啶并 (2,3-c)azocine 衍生物。该方法的关键步骤是基于含氮羧酸和链烷醇在 AlCl 3、P 2O5 或 PPA 催化剂存在下以总体高产率进行的 Friedel-Crafts 闭环。起始羧酸是通过明确的合成途径通过三甲基羟吲哚的碱性水解和 N-芳基化反应制备的。