The use of polyphosphoric ester and polyphosphoric acid in the synthesis of 1,4-dihydro-4-oxoquinolines
作者:Kentaro Okumura、Takeshi Adachi、Masayasu Tomie、Kazuhiko Kondo、Ichizo Inoue
DOI:10.1039/p19720000173
日期:——
The synthesis of 1-alkyl-1,4-dihydro-4-oxoquinolines by the cyclization of derivatives of 2-(N-alkylanilino)acrylic acid in the presence of polyphosphoric acid or ester has been investigated. The results indicate that polyphosphoric ester is a more efficient reagent for the cyclization of 2-(N-alkylanilino)acrylic acid derivatives than polyphosphoric acid and also has advantages over the thermal cyclization
已经研究了在多磷酸或酯存在下通过2-(N-烷基苯胺基)丙烯酸衍生物的环化反应合成1-烷基-1,4-二氢-4-氧代喹啉。结果表明,与聚磷酸相比,聚磷酸酯是用于2-(N-烷基苯胺基)丙烯酸衍生物的环化的更有效试剂,并且还具有优于热环化的优点。