水杨醛分别与2-氨甲基吡啶和4-氨甲基吡啶通过亲核反应,得到2种双席夫碱2-{1,2-二[(E)-2-羟基苯亚甲氨基)]-2-(吡啶基)乙基}苯酚,其还原产物与甲醛发生关环反应,得到2种结构新颖的多酚羟基咪唑啉化合物2-[1,3-二(2-羟基苯甲基)-5-(2-吡啶基)-4-咪唑烷基]苯酚(2a)和2-[1,3-二(2-羟基苯甲基)-5-(4-吡啶基)-4-咪唑烷基]苯酚(2b),用-1H NMR、-(13)C NMR、IR等对2a、2b的结构进行了表征。通过X-射线单晶衍射确定了2a的晶体结构,2a的晶体属于单斜晶系,P2_1/c空间群,晶胞参数:a=1.346 0(4)nm,b=1.477 1(4)nm,c=1.202 7(5)nm,β=100.490(1)°,V=2.351 1(14)nm-3,Dc=1.281 mg/cm^-3,Z=4,F(000)=960.439 0,μ=0.08mm^-1。
Sailcylaldehyde reacts respectively with 2-aminomethylpyridine and 4-aminomethylpyridine to afford two bis-schiff bases, whose reduction products, 2-[1,2-bis { [ (E)-(2-hydroxyphenyl) methylidene] amino}-2-pyridinylethyl] phenol (1a, 1b), further react with formaldehyde to produce two novel imidazolines derivates,2-[-1,3-bis(2-hydroxy benzyl)-5- (2-pyridyl)-4-imidazolidinyl] phenol(2a) and 2- [1, 3-bis ( 2-hydroxy benzyl)-5-(4-pyridyl)-4-imidazolidinyl ] phenol (2b) . Their structures were characterized by 1H NMR, 13C NMR, IR and X-ray single-crystal diffraction(2a). 2a belongs to monoclinic system, space group P2(1)/n with a=1.346 0(4) nm, b=1.477 1(4) nm, c=1.202 7(5) nm, β=100.490 0(1)°, V=2.351 1(14) nm^3, Dc=1.281 mg/cm^3, Z=4, F(000)=960.439 0, μ= 0.08 mm^-1.