Nuclear magnetic resonance (NMR) spectroscopy is a technique that detects the chemical environment of atomic nuclei by the absorption of radio-frequency electromagnetic radiation when in the ...

State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China ...

Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P. R. China Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P. R. China State Key Laboratory of ...

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Ltd. (Shanghai, China). Cross-linked polyvinylpyrrolidone (PVPP) was purchased from Beijing Solarbio Science and Technology Co., Ltd. (Beijing, China). Ethyl acetate was purchased from Tianjin Fuyu ...

27 In this work, we describe the synthesis of 11 isatin derivatives that were obtained in low to high yields. These compounds were characterized by means of nuclear magnetic resonance spectrometry ...