[4+2] Cycloadditions of 3-Tetrazolyl-1,2-diaza-1,3-butadienes: Synthesis of 3-Tetrazolyl-1,4,5,6-tetrahydropyridazines
作者:Susana M. M. Lopes、Amadeu F. Brigas、Francisco Palacios、Américo Lemos、Teresa M. V. D. Pinho e Melo
DOI:10.1002/ejoc.201101826
日期:2012.4
3-tetrazolyl-1,4,5,6-tetrahydropyridazines by Diels–Alder reactions of ethyl 3-(tetrazol-5-yl)-1,2-diaza-1,3-butadiene-1-carboxylates is reported. These 1,2-diaza-1,3-dienes reacted with electron-rich heterocycles, nucleophilic olefins and cumulenes, as well as with electron-deficient dienophiles, to give the target compounds regioselectively. Computational studies corroborated the rationalization of the observed
通过 3-(四唑-5-基)-1,2-二氮杂-1,3-丁二烯-1-羧酸乙酯的 Diels-Alder 反应合成新的 3-四唑基-1,4,5,6-四氢哒嗪是报道。这些 1,2-二氮杂-1,3-二烯与富电子杂环、亲核烯烃和枯草烯以及缺电子亲二烯体反应,区域选择性地得到目标化合物。计算研究证实了观察到的反应性和选择性的合理化。