Synthesis of 1<i>H</i>-pyrazino[1,2-<i>a</i>]pyrido[2,3-<i>e</i>]pyrazine and 2<i>H</i>-Pyrano[2,3-<i>b</i>]pyrido[2,3-<i>e</i>]pyrazine Derivatives
作者:Francesco Savelli、Alessandro Boido、Gianluca Damonte
DOI:10.1002/jhet.5570330632
日期:1996.11
With a continuing interest on heteropolycyclic structures which may show biological activities, we synthesized new tricyclic derivatives in which the pyridopyrazine skeleton is fused with pyrazine 7 and 8, B, n = 1. However, the initial design of obtaining also the cyclohomologous structure B (n = 2) produced instead a pyranopyridopyrazine derivative 11. Thus during the attempt to prepare a pyridodiazepine
随着对杂多环结构一个持续的兴趣,其可以示出生物活性,我们合成了其中吡啶并吡嗪骨架稠合吡嗪与新三环衍生物7和8,B中,n = 1。然而,也获得cyclohomologous结构的初始设计乙( n = 2)代替生成吡喃并吡啶并吡嗪衍生物11。因此,在尝试制备吡啶二氮杂中间体的过程中,除了非常少量的所需产物10之外,还获得了吡啶并吡嗪9。后者化合物与反应氯乙酰氯/ chloroketene,得到4-乙氧羰基-10-(氯乙酰基)-5,10-二氢-5-甲基-2- ħ吡喃并[2,3-b ] pyrido [2,3 - e ] pyrazin-2-one(11)。在研究该衍生物的行为时,获得了化合物12-14。化合物4b,c,5a,b,7、8、9和14已作为CNS抑制剂进行了初步的药理筛选。