A facile one-pot regioselective synthesis of [1,2,4]triazolo[4,3-a]5(1H)-pyrimidinones via tandem Japp-Klingemann, Smiles rearrangement, and cyclization reactions
作者:Ahmad S. Shawali、Magda A. Abdallah、Mosselhi A. N. Mosselhi、Thoraya A. Farghaly
DOI:10.1002/hc.10008
日期:——
gave [1,2,4]triazolo[4,3-a]pyrimidines (7). The latter products were also obtained by reactions of hydrazonoyl chlorides (10) with either 6-phenyl-2-thiouracil (1) or the 2-methylthio derivative 9. The mechanisms and the regiochemistry of the reactions studied are discussed. © 2002 Wiley Periodicals, Inc. Heteroatom Chem 13:136–140, 2002; Published online in Wiley Interscience (www.interscience.wiley
活性 [(4-oxo-6-phenyl-3H-pyrimidin-2-yl)thio] 次甲基化合物 (3) 与重氮化苯胺在碱存在下偶联得到 [1,2,4] 三唑并 [4,3- a]嘧啶(7)。后一种产物也可通过腙酰氯 (10) 与 6-苯基-2-硫尿嘧啶 (1) 或 2-甲硫基衍生物 9 的反应获得。讨论了所研究反应的机制和区域化学。© 2002 Wiley Periodicals, Inc. 杂原子化学 13:136–140, 2002; 在线发表于 Wiley Interscience (www.interscience.wiley.com)。DOI 10.1002/hc.10008