作者:David E. Pereira、Gary L. Clauson、Nelson J. Leonard
DOI:10.1016/s0040-4020(01)87674-2
日期:1987.1
In a two-step synthesis from starting amines, a series of compounds has been prepared in which steric crowding (lb,c,d,f) was introduced into the “bay region” of pyrido [1“,2” : 1‘,2’] imidazo [4‘,5’ : 4, 5] imidazo [1,2-] pyridine (1a). This forces the tetracyclic ring system into non-planarity. Two hexaheterohelicencs 2a and b were prepared that incorporate the 1, 3, 4, 6-tetraazapentalene ring system
在由起始胺进行的两步合成中,制备了一系列化合物,其中空间拥挤(lb,c,d,f)被引入吡啶基[1“,2”:1'的“海湾区域”中, 2']咪唑并[4',5':4,5]咪唑并[1,2- ]吡啶(1a)。这迫使四环系统变成非平面的。制备了两个六杂环化合物2a和b,它们结合有1、3、4、6-四氮杂戊烯环系统,并且由于末端环而在“海湾区域”中提供了分子拥挤,这同样使六环系统偏离了平面度。单晶X射线结构测定表明,化合物(1b,c,d,f,2a和b)以结晶状态以对映体对形式存在。