conjugated azoalkenes, gave the 1-ureido-4-amino-3-methyl-1H-pyrazol-5(2H)-ones through a base promoted heterocyclization process, while in the presence of copper (I) species the 1-ureido-5-methyl-4-imidazolines and the 4-methoxycarbonyl-5-methyl-1-ureidoimidazole were obtained. The mechanism of these reactions is discussed.
通过将1,4-
肌氨酸或甘
氨酸
乙酯加到共轭偶氮烯烃上获得的标题化合物通过碱得到1-
脲基-4-
氨基-3-甲基-1H-
吡唑-5(2H)-。促进了杂环化过程,而在存在
铜(I)物种的情况下,获得了1-ureido-5-甲基-4-
咪唑啉和4-甲氧基羰基-5-甲基-1-
脲基
咪唑。讨论了这些反应的机理。