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更新日期:2017-10-19
  • Efficient fluorescence properties both in solution and solid state of several 7-diethylaminocoumarin amide compounds
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Yatong Sun, Yunhui Sun, Songfang Zhao, Duxia Cao, Ruifang Guan, Zhiqiang Liu, Xueying Yu, Xun Zhao

    Three 7-diethylaminocoumarin amide compounds with phenyl (1), benzyl (2) and benzothiazole (3) as terminal groups were developed. The crystal structures of compounds 1 and 2 were determined by single crystal X-ray diffraction analysis. All the compounds exhibit strong blue fluorescence emission and high fluorescence quantum yields in both THF (1:0.36; 2:0.43; 3:0.27) and high viscosity solvent glycerol solution (1:0.32; 2:0.38; 3:0.41). Compound 1 displays bright yellow-green fluorescence with fluorescence peak being 537 nm and quantum yield being 0.47 in solid powder state. To compound 1, there is a 92 nm red shift and fluorescence emission enhancement phenomenon in solid powder state relative to that in THF was observed. Compound 2 emits bright blue fluorescence (463 nm, Φ = 0.36) in solid powder state, which is slightly blue shifted relative to that in THF (466 nm, 482 nm) and a narrow peak with full width at half maximum being only 39 nm. The strong fluorescence emission in high viscosity glycerol solution and solid state may be derived from restriction of rotation of 7-diethylamine group in the molecules, which leads to non-radiative deactivation.

    更新日期:2017-10-19
  • Ru(bpy)3Cl2 as a Photocatalyst for Visible-Light-Induced Fluoroalkylation of Anilines with BrCF2CF2Br: A Facile Route to 2-Bromo-1,1,2,2-tetrafluoroethyl Arenes
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-19
    Jingjing Kong, Jianfang Jiang, Yang Huang, Yue-Guang Lou, Xiao-Fei Li, Chun-Yang He
    更新日期:2017-10-19
  • Pot-economy synthesis of hydroxylated arylethenyl-arylethynyl-arenes through sequencial decarboxylative Perkin-Sonogashira reactions.
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Amit Shard, Rajesh Kumar, Danish Equbal, Arun Kumar Sinha

    A simple, economical and one-pot protocol is developed for construction of multiple carbon-carbon bonds having C(sp2)-C(sp2) and C(sp2)-C(sp) hybridization, as these intriguing molecular architectures embrace significant optoelectronic and medicinal properties. To this end, a sequencial reaction is devised that allows one-pot three-component reaction of hydroxy benzaldehydes (C6-C1 unit), halo-phenylacetic acid (C6-C2 unit) and arylacetylenes (C6-C3 unit) resulting in the formation of highly π-conjugated complex arylethenyl-arylethynyl-arenes (C6-C2-C6-C2-C6 unit) bearing hydroxy group via sequential Perkin condensation/ decarboxylation-Sonogashira coupling reaction in poly(ethylene glycol) under microwave irradiation. The process avoids protection-deprotection manipulations, generates CO2 and H2O as by-products and has been successfully extended for the efficient construction of a wide series of novel aliphatic/ alicyclic/(hetero)aromatic arylethenyl-arylethynyl-arene with pendant hydroxy functionality which could allow further chemical modification to achieve desired biological and physical properties.

    更新日期:2017-10-18
  • Ipso Nitration of 2-Halothiophenes with Silver Nitrate
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Gon-Ann Lee, Hung-Chun Lin, Hsin-Yi Lee, Chien-Hsun Chen, Hsiang-Yun Huang
    更新日期:2017-10-18
  • RuII-Catalyzed ortho-Sulfonamidation of α-Tetralones with Sulfonyl Azides and Synthesis of Sivelestat by Aromatic C−H Activation
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Medikonda V. Krishna Rao, Keesari Nagarjuna Reddy, Balasubramaniam Sridhar, Basi V. Subba Reddy
    更新日期:2017-10-18
  • Brønsted-Acid-Catalyzed Substrate-Controlled and Site-Selective Friedel–Crafts Alkylation: A New Strategy for Post-Modification of 1,2-Dihydroquinolines
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Jin Huang, Guangxun Li, Guobin Yang, Jinzhong Zhao, Zhuo Tang
    更新日期:2017-10-18
  • Elemental-Sulfur-Promoted C(sp3)−H Activation of Methyl Heteroarenes Leading to Thioamides
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Jianming Liu, Shanshan Zhao, Xuyang Yan, Yanyan Zhang, Shufang Zhao, Kelei Zhuo, Yuanyuan Yue
    更新日期:2017-10-18
  • One-Step Reaction for Screening of Chromophores to Improve the Luminescence of Lanthanide Complexes
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-18
    Lixiong Dai, Wai-Sum Lo, Junhui Zhang, Ga-Lai Law
    更新日期:2017-10-18
  • Isolation and Structure Determination of New Antibacterial Peptide Curacomycin Based on Genome Mining
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-17
    Issara Kaweewan, Hisayuki Komaki, Hikaru Hemmi, Shinya Kodani
    更新日期:2017-10-17
  • Temperature-Controlled Base-Promoted Cyclization for the Synthesis of 2-Amino-4H-benzo[d][1,3]thiazin-4-ones and 2-Thioxo-4(3H)-quinazolinones
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-16
    Zhi-Wen Zhou, Feng-Cheng Jia, Cheng Xu, Shi-Fen Jiang, Yan-Dong Wu, An Xin Wu

    A base-promoted and highly selective temperature-dependent tandem oxidation/decarboxylative cyclization of isothiocyanates and isatins has been developed. This method allows the chemodivergent synthesis of 4H-benzo[d][1,3]thiazin-4-ones and 2-thioxo-2,3-dihydroquinazolin-4(1H)-ones in moderate to high yields.

    更新日期:2017-10-16
  • A Convenient Method for the Direct Acquisition of Kinetic Rate Data for Catalytic Organic Reactions by Gas Uptake Measurements
    Asian J. Org. Chem. (IF 2.788) Pub Date : 2017-10-16
    Yu-Jie Wang, Wei-Tang Li, Lei Jiao
    更新日期:2017-10-16
  • Some contents have been Reproduced with permission of the American Chemical Society.
    Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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