Transition-metal-free solid phase synthesis of 1,2-disubstituted 4-quinolones via the regiospecific synthesis of enaminones
作者:Ajjampura C. Vinayaka、Toreshettahally R. Swaroop、Prasanna Kumara Chikkade、Kanchugarakoppal S. Rangappa、Maralinganadoddi P. Sadashiva
DOI:10.1039/c5ra21421a
日期:——
Herein, the transition-metal-free economical solid phase synthesis of 1,2-disubstituted 4-quinolones has been developed via the novel regiospecific synthesis of enaminones. Notably, a wide range of enaminones were synthesized via a silica-supported solid-phase reaction in good to excellent yields. The transformation of enaminones to 1,2-disubstituted 4-quinolones and N-methyl-2-aryl-4-quinolone alkaloid
在此,通过新型的烯胺酮的区域特异性合成,已经开发了无过渡金属的1,2-二取代的4-喹诺酮的经济固相合成。值得注意的是,通过二氧化硅负载的固相反应以良好至优异的产率合成了宽范围的烯胺酮。通过氧化铝负载的固相反应以高收率实现烯胺酮向1,2-二取代的4-喹诺酮和N-甲基-2-芳基-4-喹诺酮生物碱的转化。此外,所有合成的化合物都可以通过简单的后处理程序直接从反应混合物中以纯净的形式分离出来。