- Design, synthesis and antiproliferative activity of novel benzothiazole derivatives conjugated with semicarbazone scaffold
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Two series of novel benzothiazole derivatives conjugated with semicarbazone scaffold were designed and synthesized through a structure-based molecular hybridization strategy. All the target compounds were evaluated for their cytotoxicity in vitro against three cancer cell lines (HT-29, MKN-45 and H460) by standard MTT assay. The pharmacological results indicated that seven compounds (17h-n) exhibited comparable or even better antiproliferative activity in comparison with reference drugs Sorafenib and PAC-1. Particularly, compound 17i displayed remarkable cytotoxicity against tested three cancer cell lines with IC50 values of 0.84, 0.06 and 0.52 μM, which were 4.3-, 36.6-, 4.2-folds more potent than Sorafenib and 1.2-, 13.7-, 6.9-times more active than PAC-1, respectively.
- Bao, Guanglong,Du, Baoquan,Ma, Yuxiu,Zhao, Meng,Gong, Ping,Zhai, Xin
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p. 489 - 498
(2016/07/19)
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- Fine-Tuning of Crystal Packing and Charge Transport Properties of BDOPV Derivatives through Fluorine Substitution
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Molecular packing in organic single crystals greatly influences their charge transport properties but can hardly be predicted and designed because of the complex intermolecular interactions. In this work, we have realized systematic fine-tuning of the single-crystal molecular packing of five benzodifurandione-based oligo(p-phenylenevinylene) (BDOPV)-based small molecules through incorporation of electronegative fluorine atoms on the BDOPV backbone. While these molecules all exhibit similar column stacking configurations in their single crystals, the intermolecular displacements and distances can be substantially modified by tuning of the amounts and/or the positions of the substituent fluorine atoms. Density functional theory calculations showed that the subtle differences in charge distribution or electrostatic potential induced by different fluorine substitutions play an important role in regulating the molecular packing of the BDOPV compounds. Consequently, the electronic couplings for electron transfer can vary from 71 meV in a slipped stack to 201 meV in a nearly cofacial antiparallel stack, leading to an increase in the electron mobility of the BDOPV derivatives from 2.6 to 12.6 cm2 V-1 s-1. The electron mobility of the five molecules did not show a good correlation with the LUMO levels, indicating that the distinct difference in charge transport properties is a result of the molecular packing. Our work not only provides a series of high-electron-mobility organic semiconductors but also demonstrates that fluorination is an effective approach for fine-tuning of single-crystal packing modes beyond simply lowering the molecular energy levels.
- Dou, Jin-Hu,Zheng, Yu-Qing,Yao, Ze-Fan,Yu, Zhi-Ao,Lei, Ting,Shen, Xingxing,Luo, Xu-Yi,Sun, Junliang,Zhang, Shi-Ding,Ding, Yi-Fan,Han, Guangchao,Yi, Yuanping,Wang, Jie-Yu,Pei, Jian
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supporting information
p. 15947 - 15956
(2016/01/09)
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- Synthesis of insecticidal fluorinated anthranilic diamides
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A series of highly active fluorinated anthranilic diamide insecticides have been prepared and their biological activity assessed on two aphid species in the search for systemically active compounds that control Hemiptera. In addition, we have demonstrated a new synthesis of N-aryl 3-fluoropyrazoles.
- Clark, David A.,Lahm, George P.,Smith, Ben K.,Barry, James D.,Clagg, Don G.
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p. 3163 - 3170
(2008/09/20)
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- Indolo[2,1-biquinazoline-6,12-dione antibacterial compounds and methods of use thereof
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Methods, compounds and compositions are provided form inhibiting the growth of pathogenic mycobacteria in vitro and of treatment of pathogenic mycobacterial infections in vivo using indolo[2,1-b]quinazoline-6,12-dione compounds of the formula (I): STR1 wherein A, B, C, D, E, F, G and H are independently selected from carbon and nitrogen, or A and B or C and D can be taken together to be nitrogen or sulfur, and the pharmaceutically acceptable salts thereof. The methods, compounds and compositons are particularly useful for inhibiting the growth of Mycobacterium tuberculosis, and may be used alone, or in combination with other anti-Mycobacterium tuberculosis agents, such as isoniazid, rifampin, pyrazinamide, rifabutin, streptomycin and ciprofloxacin, to provide new agents for the treatment of tuberculosis, including multidrug-resistant tuberculosis (MDRTB).
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