Alternative method for the synthesis of imidazo[5,1-f][1,2,4]triazin-4(3H)-one—a substrate for the preparation of phosphodiesterase (5) inhibitors
作者:Teresa Olszewska、Ewa P. Gajewska、Maria J. Milewska
DOI:10.1016/j.tet.2012.11.037
日期:2013.1
Imidazo[5,1-f][1,2,4]triazin-4(3H)-ones, as isosteres of purine, are of interest for pharmaceutical research as potential substrates for the synthesis of cGMP-PDE5 inhibitors. We present a novel, alternative method for the synthesis of imidazotriazinones, that differs from the previously reported ones with respect to the method of construction of the triazinone ring in the molecule. The key step in
作为咪唑嘌呤的咪唑并[5,1- f ] [1,2,4]三嗪-4(3 H)-酮作为合成cGMP-PDE5抑制剂的潜在底物在药物研究中引起人们的兴趣。我们提出了一种新颖的,可供选择的合成咪唑并三嗪酮的方法,该方法与先前报道的关于在分子中构建三嗪酮环的方法不同。我们方法的关键步骤是适当的α-酮酯与酰胺基的缩合,生成三嗪酮杂环。已经以这种方式合成了几种不同的取代的咪唑并三嗪酮。