for the synthesis of some novel fused heteropolycycles. Thus, a variety of fused di-, tri- and tetracyclic nitrogen and nitrogen-sulfur heteropolycycles 8, 9, 11-15 were smoothly synthesized by Friedel-Crafts intramolecular alkylations of heteroarylalkanols 1-7 in the presence of both Bronsted (PPA and PTSA) and Lewis (AlCl3/CH3NO2) acid catalysts. The precursor alkanols were readily prepared by reaction
该研究为合成一些新型稠合杂多环提供了便利的方法。因此,在Bronsted(
PPA和
PTSA)存在下,杂芳基烷醇1-7的Friedel-Crafts分子内烷基化顺利合成了各种稠合的二环、
三环和四环氮和氮
硫杂多环8、9、11-15。 ) 和路易斯 (
AlCl3/
CH3NO2) 酸催化剂。前体链烷醇很容易通过相应的
羧酸酯与
甲基碘化镁反应制备。使用光谱和分析数据确定化合物的结构。提出了一种合理的碳正离子机制来解释结果。