Selenium-Containing Heterocycles. Synthesis and Reactions of 2-Amino-4,5,6,7-tetrahydro-1-benzoselenophene-3-carbonitrile with Anticipated Biological Activity
作者:Sh. H. Abdel-Hafez
DOI:10.1007/s11178-005-0177-z
日期:2005.3
Reaction of 2-amino-4,5,6,7-tetrahydro-1-benzoselenophene-3-carbonitrile with ethylenediamine in the presence of a catalytic amount of carbon disulfide afforded 2-amino-3-(4,5-dihydro-1H-imidazol-2-yl)-4,5,6,7-tetrahydro-1-benzoselenophene. Cyclocondensation of the latter with triethyl orthoformate, benzaldehyde, and carbon disulfide gave tetracyclic imidazobenzoselenophenopyrimidine derivatives. Treatment of 2,3,5,6,8,9,10,11-octahydroimidazo[2,1-c][1]benzoselenopheno[3,2-e]pyrimidine-5-thione with hydrazine hydrate led to the corresponding 5-hydrazino derivative whose reactions with triethyl orthoformate and sodium nitrite were accompanied by closure of 1,2,4-triazole and tetrazole rings, respectively. Fused benzoseleno-phenopyrimidine systems were also obtained by reaction of 2-amino-4,5,6,7-tetrahydrobenzo-1-selenophene-3-carbonitrile with formamide, carbon disulfide, and phenyl isothiocyanate. Some newly synthesized compounds were tested for antimicrobial and antifungal activity.
2-氨基-4,5,6,7-四氢-1-苯硒吡啶-3-氰与乙二胺在催化量二硫化碳的存在下反应,合成了2-氨基-3-(4,5-二氢-1H-咪唑-2-基)-4,5,6,7-四氢-1-苯硒吡啶。后者与三乙基邻甲酸酯、苯甲醛和二硫化碳的环缩合反应给出了四环咪唑苯硒啶嘧啶衍生物。用肼水合物处理2,3,5,6,8,9,10,11-八氢咪唑[2,1-c][1]苯硒啶[3,2-e]嘧啶-5-硫醇,得到相应的5-肼基衍生物,其与三乙基邻甲酸酯和亚硝酸钠的反应分别伴随着1,2,4-三唑和四唑环的闭合。通过2-氨基-4,5,6,7-四氢苯-1-硒吡啶-3-氰与甲酰胺、二硫化碳以及苯基异硫氰酸酯反应,也获得了融合的苯硒苯啶嘧啶系统。一些新合成的化合物被测试了其抗微生物和抗真菌活性。