Synthesis and Receptor Binding of New Thieno[2,3-d]-pyrimidines as Selective Ligands of 5-HT3Receptors
作者:Maria N. Modica、Giuseppe Romeo、Loredana Salerno、Valeria Pittalà、Maria A. Siracusa、Ilario Mereghetti、Alfredo Cagnotto、Tiziana Mennini、Róbert Gáspár、Adrienn Gál、George Falkay、Márta Palkó、Gábor Maksay、Ferenc Fülöp
DOI:10.1002/ardp.200700205
日期:2008.6
aim to develop new potent and selectiveligands of 5‐HT3‐type serotonin receptors and to acquire more information on their structure‐affinity relationships, newthieno[2,3‐d]pyrimidine derivatives 32–39 were synthesized and their binding to 5‐HT3 versus 5‐HT4 receptors was studied. Some of these new compounds exhibit good affinity for cortical 5‐HT3 receptors, but not for 5‐HT4 receptors. Among these
Synthesis and Biological Activity of a Series of New Thieno[2,3-d]Pyrimidines
作者:Tao Wang、Cai Hua Zheng、Sue Liu、Hui Zong Chen
DOI:10.1080/10426500903127565
日期:2010.6.30
Ethyl 2-amino-5-ethylthiophene-3- carboxylate 1, obtained from the reaction of butyraldehyde, ethyl cyanoacetate, sulfur, and triethylamine, reacted with benzoylisothiocyanate to give the corresponding ureido derivatives 2 in a high yield. Further reactions of the compound 2 with an aqueous-alcohol solution of potassium hydroxide and then with hydrochloric acid gave the 2-thio-thieno[2,3-d]pyrimidine-4-ones 3, which were reacted with RX to give novel compounds 4a-4i. Treating the compound 3 with dibromoalkane led to the formation of triacylic compounds 5j-5m. Their structures were clearly verified by IR, 1H NMR, EI-MS spectroscopy, and elemental analysis. The results of a preliminary bioassay indicated that some compounds possess excellent inhibitory activities against the root and the stalk of Brassica napus (rape) and Echinochloa crusgalli (barnyard grass) at a dosage of 100 mg/L. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.