Synthesis of pyrrolo[2,1-<i>f</i>][1,2,4]triazine congeners of nucleic acid purines<i>via</i>the<i>N</i>-amination of 2-substituted pyrroles
作者:Shirish A. Patil、Brian A. Otter、Robert S. Klein
DOI:10.1002/jhet.5570310415
日期:1994.7
The synthesis of several new 4-mono- and 2,4-disubstituted pyrrolo[2,1-f][1,2,4]triazines is described. Key 1-aminopyrrole-2-carbonitrile intermediates 3 and 15 were obtained by N-amination of the corresponding pyrrole-2-carboxaldehyde followed by CHO → CN conversion with either hydroxylamine-O-sulfonic acid for 3 or O-mesitylenesulfonylhydroxylamine for 15. Cyclization of 3 or 15 with a variety of
描述了几种新的4-单-和2,4-二取代的吡咯并[2,1- f ] [1,2,4]三嗪的合成。关键的1-氨基吡咯-2-腈中间体3和15是通过对相应的吡咯-2-甲醛进行N-氨化反应,然后用羟胺-O-磺酸(3价)或O-间三甲苯磺酰基羟胺(15)进行CHO→CN转化而获得的。环化的3或15与各种脒试剂或,转换后3到其相应的酰胺,碱催化的环化完成标题产物的合成。