Synthesis of pyrido[2,3-d]pyridazines and pyrazino[2,3-d]-pyridazines—novel classes of GABAA receptor benzodiazepine binding site ligands
作者:Andrew Mitchinson、Wesley P. Blackaby、Sylvie Bourrain、Robert W. Carling、Richard T. Lewis
DOI:10.1016/j.tetlet.2006.01.084
日期:2006.3
Novel syntheses of 2,3,8-trisubstituted pyrido[2,3-d]pyridazines and 2,3,5-trisubstituted pyrazino[2,3-d]pyridazines are described. Two complementary routes to pyrido[2,3-d]pyridazines were developed, the first of which began by constructing the pyridine ring, and the second of which started by constructing the pyridazine ring. Pyrazino[2,3-d]pyridazines were prepared in a route employing an aza-Wadsworth–Emmons
2,3,8三取代的吡啶并[2,3的新颖的合成d ]哒嗪和2,3,5-三取代的吡嗪并[2,3- d ]哒嗪中描述。开发了两个互补的吡啶并[2,3- d ]哒嗪途径,第一个通过构建吡啶环开始,第二个通过构建哒嗪环开始。在以aza-Wadsworth-Emmons环化为关键步骤的路线中制备了吡嗪并[2,3- d ]哒嗪。发现所得化合物是针对GABA A受体苯并二氮杂卓结合位点的高亲和力配体。