Tungstate sulfuricacid (TSA) as a solid acid catalyst has been synthesized and used in Paal–Knorr synthesis of some novel and knownpyrroles under solvent-free conditions. Catalyst loadings can be as low as 1 mol % to give high yields of the corresponding pyrroles at 60 °C. To make the catalyst, sodium tungstic reacted with chlorosulfonic acid in nhexane.
Molybdate sulfuric acid as a highly efficient catalyst has been employed for the modified Paal–Knorr synthesis of some novel and known pyrroles under solvent‐free conditions. Catalyst loads as low as 1 mol% could be used leading to high yields of pure pyrrole derivatives at an oil bath temperature of 60 °C. This method has advantages such as the use of very low amounts of a recyclable catalyst, avoidance
Abstract Water was a suitable medium for Paal–Knorrpyrrole cyclocondensation. Hexa-2,5-dione was reacted with several aliphatic and aromatic primary amines, affording N-substituted 2,5-dimethyl pyrrole derivatives in good to excellent yields. An efficient, green method using water either as environmentally friendly solvent or catalyst was presented. GRAPHICAL ABSTRACT
pyrrole-thiazolidinone hybrids was designed, synthesized and evaluated for activities against ESKAP bacteria panel and mycobacterial pathogens. From the series, compound 9d showed prominent activity againstS. aureus (MIC = 0.5 μg/mL) and compound 9k showed the most promising activity againstM. tuberculosis H37Rv (MIC = 0.5 μg/mL). Potent derivatives were found to be non-toxic when tested against Vero cells.
设计、合成了一系列吡咯-噻唑烷酮杂化物,并评估其针对 ESKAP 细菌组和分枝杆菌病原体的活性。在该系列中,化合物9d显示出显着的抗金黄色葡萄球菌活性。金黄色葡萄球菌(MIC = 0.5 μg/mL) 和化合物9k显示出最有希望的抗金黄色葡萄球菌活性。结核病H37Rv(MIC = 0.5 μg/mL)。当针对 Vero 细胞进行测试时,发现有效的衍生物是无毒的。化合物9d在针对几种MRSA和VRSA菌株的体外评估中产生了与标准药物相当或更好的活性。在抗生物膜测定中, 9d减少了S。在 10 倍 MIC 时,金黄色葡萄球菌生物膜增加 >11%。吡咯-噻唑烷酮杂化物表现出的双重抑制作用证实了它们作为新型有前途的抗感染剂的潜力。