Synthesis of some novel pyrazolo[3,4-d]pyrimidine derivatives as potential antimicrobial agents
作者:Bantwal Shivarama Holla、Manjathuru Mahalinga、Mari Sitambaram Karthikeyan、Padiyath Mohamed Akberali、Nalilu Sucheta Shetty
DOI:10.1016/j.bmc.2005.10.053
日期:2006.3
6-methyl-1-[8-(trifluoromethyl)quinolin-4-yl]pyrazolo[3,4-d]oxazin-4-one (6), which was condensed with different aromatic amines to give a series of 5-substituted 6-methyl-1-[8-(trifluoromethyl)quinolin-4-yl]-1,5-dihydro-4H-pyrazolo[3,4-d]pyrim idin-4-ones (7). Compounds 3 and 5 also reacted with formamide, urea, and thiourea affording the corresponding pyrazolo[3,4-d]pyrimidines (8-13), respectively. Structures
4-肼基-8-(三氟甲基)喹啉(2)与乙氧基亚甲基氰乙酸酯的反应得到5-氨基-1- [8-(三氟甲基)喹啉-4-基] -1H-吡唑-4-羧酸乙酯(3)和用乙氧基亚甲基丙二腈制备5-氨基-1- [8-(三氟甲基)喹啉-4-基] -1H-吡唑-4-腈(5)。水解化合物3和5,得到5-氨基-1- [8-(三氟甲基)喹啉-4-基] -1H-吡唑-4-羧酸,然后与乙酸酐反应,得到6-甲基-1- [将8-(三氟甲基)喹啉-4-基]吡唑并[3,4-d]恶嗪-4-酮(6)与不同的芳族胺缩合,得到一系列5-取代的6-甲基-1- [ 8-(三氟甲基)喹啉-4-基] -1,5-二氢-4H-吡唑并[3,4-d]嘧啶艾丁-4-酮(7)。化合物3和5也与甲酰胺,尿素和硫脲反应,得到相应的吡唑并[3,4-d]嘧啶(8-13)。产品的结构已通过化学反应和光谱研究确定。已筛选该系列所有化合物的抗菌和抗真菌活性研究。结果总结在表1和2中。