8-disubstituted pyrido[3,4-b]pyrazines, by initial condensation reaction between suitable diaminopyridines and α-keto aldehydes equivalents, has been developed. Focusing on the functionalization on C-8, 2-aryl-8-bromo- and 8-amino-2-arylpyrido[3,4-b]pyrazines have been synthesized. Anilines, amides, and ureas have been introduced at the 8-position from key intermediates. 2,8-Disubstituted pyrido[3,4-b]pyrazines
通过合适的二氨基吡啶与α-酮醛等价物之间的初步缩合反应,已开发出一种选择性合成2,8-二取代的吡啶并[3,4- b ]吡嗪的方法。着眼于在C-8上的官能化,已经合成了2-芳基-8-溴-和8-氨基-2-芳基吡啶并[3,4- b ]吡嗪。苯胺,酰胺和脲已从关键中间体的8位引入。发现由此制备的2,8-二取代的吡啶并[3,4- b ]吡嗪具有生物学意义。 吡啶并[3,4- b ]吡嗪 -吡啶-硫缩醛-苯乙二醛-区域选择性-缩合
Preparation of Novel 2,3,8-Trisubstituted Pyrido[3,4-b]pyrazines and Pyrido[2,3-b]pyrazines
A four-step synthesis of 8-bromo-2,3-disubstituted pyrido[3,4-b]pyrazines and a six-step synthesis of 8-amino-2,3-disubstituted pyrido[3,4-b]pyrazines have been developed. A particularly valuable feature of this synthetic route is the possibility to build 2,3-disubstituted pyrido[3,4-b]pyrazines with a large variety of substituents in position 8 (aniline, amide, urea, thiourea). Our protocol was extended
八步合成8-溴-2,3-二取代的吡啶并[3,4- b ]吡嗪和六步合成8-氨基-2,3-二取代的吡啶并[3,4- b ]吡嗪已开发。该合成路线的特别有价值的特征是可以构建在位置8(苯胺,酰胺,尿素,硫脲)具有多种取代基的2,3-二取代的吡啶并[3,4- b ]吡嗪。我们的协议扩展到2,3,8-三取代吡啶并[2,3- b ]吡嗪的合成。 吡啶并[3,4- b ]吡嗪-吡啶并[2,3- b ]吡嗪-二氨基吡啶-尿素-硫脲-酰胺
7-substituted imidazo[4,5-c]pyridine antagonists of gonadotropin releasing hormone receptor
申请人:Wyeth
公开号:US07582634B2
公开(公告)日:2009-09-01
The present invention relates to Gonadotropin Releasing Hormone (GnRH, also known as Luteinizing Hormone Releasing Hormone) receptor antagonists.