Evaluation of N-Aromatic Maleimides as Free Radical Photoinitiators: A Photophysical and Photopolymerization Characterization
作者:Chris W. Miller、E. Sonny Jönsson、Charles E. Hoyle、Kalyanaraman Viswanathan、Edward J. Valente
DOI:10.1021/jp002811v
日期:2001.4.1
Planar N-aromatic maleimides were found to have a low relative excited-state triplet yield, showing significant shift of the primary maleimide UV absorption band with changes in solvent polarity, and did not initiate free radial polymerization upon direct UV excitation. Twisted N-aromatic maleimides have a higher relative triplet yield, show negligible shift of the primary maleimide UV absorption band
Design, synthesis and biological evaluation of novel 3,4-dihydro-2(1H)-quinolinone derivatives as potential chitin synthase inhibitors and antifungal agents
作者:Baihui Li、Yangli Shen、Hu Wu、Xiaobo Wu、Lvjiang Yuan、Qinggang Ji
DOI:10.1016/j.ejmech.2020.112278
日期:2020.6
A series of 3,4-dihydro-2(1H)-quinolinone derivatives contained butenediamide fragment were designed and synthesized. Their inhibition potency against chitin synthase and antimicrobial activities were screened in vitro. The enzymatic assays showed that all the synthesized compounds had inhibition potency against chitin synthase at concentration of 300 μg/mL. Compound 2d displayed excellent potency
设计合成了一系列含有丁烯二酰胺片段的3,4-二氢-2(1H)-喹啉酮衍生物。在体外筛选了它们对几丁质合酶的抑制能力和抗菌活性。酶促测定表明,所有合成的化合物在300μg/ mL的浓度下均具有针对甲壳质合酶的抑制能力。化合物2d表现出优异的效能,抑制百分数(IP)值为82.3%,而对照多恶菌素B的IP值为87.5%。IP值高于70%的化合物2b,2e和2s显示出对几丁质合酶的良好抑制能力。此外,2b的IC50值可与多恶英B(0.09 mM)相媲美。化合物2b的Ki为0.12 mM,Lineweaver-Burk图的结果表明2b是与甲壳质合酶结合的非竞争性抑制剂。抗真菌实验表明,这些化合物对真菌菌株,特别是白色念珠菌具有优异的抗真菌活性。化合物2b,2d,2e和2l对白念珠菌的抗真菌活性与氟康唑相当,并且优于多恶灵B。同时,其他化合物对白念珠菌的抗真菌活性也更好(MIC 2μg/ mL )比化合物2n(MIC
Catalyst and Additive-Free Diastereoselective 1,3-Dipolar Cycloaddition of Quinolinium Imides with Olefins, Maleimides, and Benzynes: Direct Access to Fused <i>N,N</i>′-Heterocycles with Promising Activity against a Drug-Resistant Malaria Parasite
A convenient and eco-friendly synthesis of various fused N-heterocyclic compounds through catalyst and additive-free 1,3 dipolar cycloadditions of quinolinium imides with olefins, maleimides, and benzynes in excellent yields and diastereoselectivities is reported. The thermally controlled diastereoselective [3 + 2] cycloaddition reaction between quinolinium imides and olefins provided cis-isomers at
Construction of nine non-covalently-bonded zinc(II) and cadmium(II) supramolecules containing the mixed-ligands of 3,5-dimethylpyrazole and carboxylates: Their synthesis and characterization
作者:Kaikai Hu、Shouwen Jin、Zuoran Xie、Ming Guo、Zhihao Lin、Daqi Wang
DOI:10.1016/j.poly.2017.09.051
日期:2018.1
neutral N atom. The carboxylate ligands in 1, 2, 3, 5, 6 and 8 act only as unidentate coordination ligands, while the carboxylate ligands in 4 and 7 have a chelating bidentate coordination mode. Compound 9 contains both unidentate bridging and chelating bidentate coordinated carboxylate groups. The uncoordinated O atom of the COO− group in 1, 2 and 3 forms an intramolecular hydrogen bond with the N–H group
Design, synthesis, and biological evaluation of novel spiro[pyrrolidine-2,3′-quinolin]-2′-one derivatives as potential chitin synthase inhibitors and antifungal agents
作者:Hu Wu、Chuanbiao Du、Yajie Xu、Lige Liu、Xin Zhou、Qinggang Ji
DOI:10.1016/j.ejmech.2022.114208
日期:2022.4
fumigatus and A. flavus as high as fluconazole had, respectively. The sorbitol protection assay and evaluation of antifungal activity against micafungin-resistant strain further verified that these compounds possessed antifungal activity through inhibiting the synthesis of chitin of cell wall. The evaluation of antifungal activity against others drug-resistant fungi variants showed these designed compounds