%0 Journal Article %T Synthesis, Antitumor Activity, and Docking Analysis of New Pyrido[3¡¯,2¡¯:4,5]furo(thieno)[3,2-d]pyrimidin-8-amines %J Molecules | An Open Access Journal from MDPI %D 2019 %R https://doi.org/10.3390/molecules24213952 %X Continuing our research in the field of new heterocyclic compounds, herein we report on the synthesis and antitumor activity of new amino derivatives of pyrido[3¡¯,2¡¯:4,5](furo)thieno[3,2- d]pyrimidines as well as of two new heterocyclic systems: furo[2¨C e]imidazo[1,2- c]pyrimidine and furo[2,3- e]pyrimido[1,2- c]pyrimidine. Thus, by refluxing the 8-chloro derivatives of pyrido[3¡¯,2¡¯:4,5]thieno(furo)[3,2- d]pyrimidines with various amines, the relevant pyrido[3¡¯,2¡¯:4,5]thieno(furo)[3,2- d]pyrimidin-8-amines were obtained. Further, the cyclization of some amines under the action of phosphorus oxychloride led to the formation of new heterorings: imidazo[1,2- c]pyrimidine and pyrimido[1,2- c]pyrimidine. The possible antitumor activity of the newly synthesized compounds was evaluated in vitro. The biological tests evidenced that some of them showed pronounced antitumor activity. A study of the structure¨Cactivity relationships revealed that the compound activity depended mostly on the nature of the amine fragments. A docking analysis was also performed for the most active compounds %U https://www.mdpi.com/1420-3049/24/21/3952