Pyrano[4,3-<i>b</i>]quinolines Library Generation via Iodocyclization and Palladium-Catalyzed Coupling Reactions
作者:Trapti Aggarwal、Maryam Imam、Naveen K. Kaushik、Virander S. Chauhan、Akhilesh K. Verma
DOI:10.1021/co200100z
日期:2011.9.12
Synthesis of a 80-member library of novel pyrano[4,3-b]quinoline in solution-Phase is reported. The key intermediate, 4-iodopyrano[4,3-b]quinolines were synthesized by the electropHic iodocyclization of corresponding oho-alkynyl ' aldehydes in good to excellent yields under mild reaction,conditions. Subsequently a diverse set of libraries was generated by employing palladium:catalyzed Suzuki-Miyauta, Heck, and Sonogashira coupling reactions on 4-iodopyrano[4,3-b]quinolines. In this:way,- a series of structurally different and biologically interesting molecules were obtained. Some of the selected compounds were screened against 3D7 strains of Plasmodium falciparum for antimalarial activity. Suzuki coupling products 63} and 621} and Heck coupling product 812} exhibit promising antimalarial activity.