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