Pyrano[4,3-d]pyrimidinium salts 5. Synthesis of 7-aryl-1,3-dimethyl-2,4-dioxo-1H,3H-pyrano[4,3-d]pyrimidinium salts and their reactions with nucleophiles
作者:I. A. Gavrilenko、V. V. Kostrub、E. B. Tsupak
DOI:10.1007/s11172-012-0090-x
日期:2012.3
Abstract7-Arylpyrano[4,3-d]pyrimidinium salts were synthesized starting from 1,3,6-trimethyluracil. In the reactions with N-nucleophiles, these salts were found to undergo recyclization of the pyrylium ring, whereas the addition of C- and O-nucleophiles occurs at free position 5 of the system.
摘要 以1,3,6-三甲基尿嘧啶为原料合成了7-芳基吡喃并[4,3-d]嘧啶鎓盐。在与 N-亲核试剂的反应中,发现这些盐会经历pyrylium 环的再循环,而 C-和 O-亲核试剂的添加发生在系统的自由位置 5。