Functionalization of Ethyl 6-Amino-4-(4-chlorophenyl)-5-cyano-2-methyl-4H-pyran-3-carboxylate: Facile Synthesis of a New Series of Pyrano[2,3-d]pyrimidine Derivatives
作者:H. A. El-Sayed、S. A. Said、A. Abd El-Hamid、A. S. A. Mohamed、A. E. Amr、H. A. Morsy
DOI:10.1134/s1070363221070203
日期:2021.7
Abstract Herein, synthesis of a new series of pyrano[2,3-d]pyrimidine scaffolds is presented. Ethyl 6-amino-4-(4-chlorophenyl)-5-cyano-2-methyl-4H-pyran-3-carboxylate has been reacted with formamide, formic acid, urea, thiourea, semicarbazide, and thiosemicarbazide to give six new pyrano[2,3-d]pyrimidine derivatives in moderate to high yields (48–78%). Acylation and intramolecular cyclization of pyran with
摘要 在此,提出了一系列新的吡喃并[2,3- d ]嘧啶支架的合成。乙基 6-amino-4-(4-chlorophenyl)-5-cyano-2-methyl-4 H -pyran-3-carboxylate 与甲酰胺、甲酸、尿素、硫脲、氨基脲和氨基硫脲反应得到六种新的吡喃[2,3- d]嘧啶衍生物的产率中等至高(48-78%)。吡喃与二硫化碳、氰乙酸乙酯、乙酸酐或氯乙酰氯的酰化和分子内环化导致形成相应的所需双环嘧啶衍生物。氯甲基衍生物通过与吗啉、哌啶或苯胺反应进行亲核取代,得到相应的2-取代嘧啶衍生物,收率良好。