Synthesis of 8‐hydroxyquinolines with amino and thioalkyl functionalities at position 4
作者:Walaa A. E. Omar、Juha P. Heiskanen、Osmo E. O. Hormi
DOI:10.1002/jhet.5570450247
日期:2008.3
Six 8-hydroxyquinolines with amino and thioalkyl functionalities at position 4 have been prepared. The synthesis starts with chlorination of the readily available 4-hydroxy-8-tosyloxyquinoline to give 4-chloro-8-tosyloxyquinoline in 94% yield. Treatment of the 4-chloro-8-tosyloxyquinoline with sulphur and nitrogen nucleophiles produces the target 4-amino and 4-thioalkyl-8-hydroxyquinolines in more
制备了在位置4具有氨基和硫代烷基官能度的六个8-羟基喹啉。合成从氯化易得的4-羟基-8-甲苯磺酰氧基喹啉开始,以94%的收率得到4-氯-8-甲苯磺酰氧基喹啉。用硫和氮亲核试剂处理4-氯-8-甲苯磺酰喹啉可以以超过70%的产率产生目标4-氨基和4-硫烷基-8-羟基喹啉。对于硫亲核试剂和吡咯烷,在位置8除去保护甲苯磺酰基的同时在位置4取代氯。