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21.
Quinoline and 2-nitroimino-1, 3-diazacycloalkane hybrids: Design,synthesis and insecticidal activity
A library of new hybrid molecules comprising quinoline, 2-nitroimino-1, 3-diazacycloalkane motifs were designed and synthesized as plausible neonicotinoid analogues. These compounds were synthesized from 2-chloro/aryloxy-3-formyl quinolines and guanidine nitrate with the coupling of 2-chloro/aryloxy-3-(chloromethyl)quinolines, 2-nitroimino-1, 3-diazacycloalkanes under phase transfer catalysis (PTC) as crucial step. All the compounds were obtained in excellent yields (80–90%) and were characterized by 1H, 13C NMR and mass spectrometry. The newly generated compounds were screened for insecticidal activity against aphids in safflower field and some of them displayed moderate activity. 相似文献
22.
Pradeepa Prabakaran Ramesh Prabhu Manimuthu Sowmya Gurusamy Edwinraj Sebasthiyan 《高分子科学》2017,35(3):407-421
Plasticized polymer electrolytes were prepared using poly(ethylene oxide)(PEO)/poly(vinylidene fluoridehexafluoro propylene)(PVd F-HFP) with lithium perchlorate(Li Cl O4) and different plasticizers. XRD and FTIR spectroscopic techniques were used to characterize the structure and the complexation of plasticizer with the host polymer matrix. The role of interaction between polymer hosts and plasticizer on conductivity is discussed using the results of alternating current(a.c.) impedance studies. TG-DTA and SEM were used for thermal and physical characterizations. Maximum ionic conductivity(3.26 × 10~(-4) S·cm~(-1)) has been observed for ethylene carbonate(EC)-based polymer electrolytes. Electrochemical performance of the plasticized polymer electrolyte is evaluated in LiFePO_4/plasticized polymer electrolytes(PPEs)/Li coin cell. Good performance with low capacity fading on charge discharge cycling is demonstrated. 相似文献
23.
Subhashini Naikal James Prameela Lavanya Jilla Sowmya Vanguru 《Journal of heterocyclic chemistry》2020,57(1):308-316
A new series of benzosuberone-piperazine hybrids 6a to j were designed and synthesized efficiently in good yields and their structures were confirmed by 1H NMR, 13C NMR, ESI-MS and HRMS. The newly synthesized compounds were evaluated for their in vitro antimicrobial activity against Gram positive, Gram negative bacterial strains and a fungal strain. Among the synthesized compounds, compounds 6c , 6d , 6e , 6f , 6g and 6h exhibited potent antibacterial activity with MIC value of 1.9 μg/mL against Gram positive and Gram negative organisms. 相似文献
24.
Tholappanavara H. Suresha Kumara Gopalpur Nagendrappa Nanjappa Chandrika Haliwana B. V. Sowmya Manpreet Kaur Jerry P. Jasinski Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2016,72(9):670-678
Hydrazone derivatives exhibit a wide range of biological activities, while pyrazolo[3,4‐b]quinoline derivatives, on the other hand, exhibit both antimicrobial and antiviral activity, so that all new derivatives in these chemical classes are potentially of value. Dry grinding of a mixture of 2‐chloroquinoline‐3‐carbaldehyde and 4‐methylphenylhydrazinium chloride gives (E)‐1‐[(2‐chloroquinolin‐3‐yl)methylidene]‐2‐(4‐methylphenyl)hydrazine, C17H14ClN3, (I), while the same regents in methanol in the presence of sodium cyanoborohydride give 1‐(4‐methylphenyl)‐4,9‐dihydro‐1H‐pyrazolo[3,4‐b]quinoline, C17H15N3, (II). The reactions between phenylhydrazinium chloride and either 2‐chloroquinoline‐3‐carbaldehyde or 2‐chloro‐6‐methylquinoline‐3‐carbaldehyde give, respectively, 1‐phenyl‐1H‐pyrazolo[3,4‐b]quinoline, C16H11N3, (III), which crystallizes in the space group Pbcn as a nonmerohedral twin having Z′ = 3, or 6‐methyl‐1‐phenyl‐1H‐pyrazolo[3,4‐b]quinoline, C17H13N3, (IV), which crystallizes in the space group R. The molecules of compound (I) are linked into sheets by a combination of N—H…N and C—H…π(arene) hydrogen bonds, and the molecules of compound (II) are linked by a combination of N—H…N and C—H…π(arene) hydrogen bonds to form a chain of rings. In the structure of compound (III), one of the three independent molecules forms chains generated by C—H…π(arene) hydrogen bonds, with a second type of molecule linked to the chains by a second C—H…π(arene) hydrogen bond and the third type of molecule linked to the chain by multiple π–π stacking interactions. A single C—H…π(arene) hydrogen bond links the molecules of compound (IV) into cyclic centrosymmetric hexamers having (S6) symmetry, which are themselves linked into a three‐dimensional array by π–π stacking interactions. 相似文献