Abstract
Two new pyrrolo[2,3-d]pyrimidines (7-deazapurines) were synthesized in high yields by the reaction of 2-amino-1-methyl-4,5-diphenyl-1H-pyrrole-3-carbonitrile with triethyl orthoformate followed by cyclocondensation with methyl or benzyl amine in refluxing glacial acetic acid or using ultrasonic irradiation containing a catalytic amount of glacial acetic acid at 60°C. For each product, the correct structural isomer was identified using the FT-IR, 1H NMR, 13C NMR, 2D nuclear Overhauser effect spectroscopy spectral and microanalytical data together with comparison of the experimental and calculated chemical shifts at the B3LYP/6-31+G(d,p) level of theory. Furthermore, the synthesized compounds were evaluated for their antibacterial activity against Gram-positive bacteria (Staphylococcus aureus and Micrococcus luteus) and Gram-negative bacteria (Escherichia coli) by the agar dilution method using 24-well microtiter plates.
摘要:本文报道了通过2-氨基-1-甲基-4,5-二苯基-1H-吡咯-3-羧腈与三乙酰基正酯反应,随后在沸腾的冰乙酸中或含有少量冰乙酸的超声波辐射下与甲基或苄基胺环合反应,高产得到两种新的吡咯并[2,3-d]嘧啶(7-去嘌呤)。对于每种产物,使用FT-IR、1H NMR、13C NMR、2D核Overhauser效应光谱和微量分析数据以及在B3LYP/6-31+G(d,p)理论水平下实验和计算化学位移的比较来确定正确的结构异构体。此外,使用24孔微孔板的琼脂稀释法评估了合成化合物对革兰氏阳性细菌(金黄色葡萄球菌和微球菌)和革兰氏阴性细菌(大肠杆菌)的抗菌活性。