Browsing by Author "Su, Haw-Lih"

Now showing items 1-6 of 6

    • Copper-Catalyzed Dual Cyclization for the Synthesis of Quinindolines 

      Wang, Hung Kai; Chio, Yu Lun; Pallikonda, Gangaram; Wu, Hsyueh Liang; Su, Haw Lih; ... more authors ( MDPI , 2020 , Article)
      A synthetic approach to quinindoline derivatives by the Cu-catalyzed dual cyclization has been developed. This catalytic reaction is a practical method for the systematic synthesis of quinindoline core structure, which ...

    • Database Facilitated Screening with NMR Spectroscopy Analysis for Drug Detection 

      Su, H.L.; Su, Haw Lih; Lee, Jeff Cheng Lung; Ibrahim, Mohammad Ibrahim Ahmad; Alsafran, Mohammed Hussain S.A.; ... more authors ( IEEE , 2019 , Conference Paper)
      © 2019 IEEE. Drug detection plays the key role in the enforcement of drug regulations. Various detection methods for them are thus developed. However, in most investigations, the most time-consuming and tedious part is not ...

    • Detecting Organic Nitrogen with 1H-15N HMBC Spectra 

      Su, Haw-Lih; Rajan, Rajeesha; Hijji, Yousef Mohammad; Ibrahim, Mohammad Ibrahim Ahmad; Alsafran, Mohammed Hussain S A (1,3) ( Qatar University Press , 2021 , Poster)
      NMR spectroscopy has been the most important tool for organic chemistry research, providing detailed structure information. While 1H and 13C NMR spectra were frequently measured, 15N NMR spectra were relatively rare, even ...

    • NMR Spectroscopy Database and Searching System 

      Su, Haw-Lih; Teng, Huei-Wen Winsome; Lee, Jeff Cheng-Lung; Shkoor, Mohammed; Ibrahim, Mohammad Ibrahim Ahmad; ... more authors ( Qatar University Press , 2020 , Poster)
      NMR spectroscopy is the most important analytical technology for organic compounds and plays the key role for the chemical characterizations and identifications in chemistry, pharmacy, materials science, environments, ...

    • Synthesis of 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles and features of their NMR spectra 

      Shkoor, Mohanad; Su, Haw‐Lih; Ahmed, Suzan; Hegazy, Sarah ( Wiley , 2019 , Article)
      Two different methods leading to 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles were investigated. Reactions of 3-aminocrotonirile with substituted salicylaldehydes provided 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles ...

    • Synthesis of N -Heterocycles via Transition-Metal-Catalyzed Tandem Addition/Cyclization of a Nitrile 

      Hsieh, Jen Chieh; Su, Haw Lih ( Thieme Gruppe , 2020 , Article)
      The diverse methodologies to synthesize N -heterocycles through transition-metal-catalyzed cascade addition/cyclization of a nitrile are discussed in this review. Aspects relating to three types of transition-metal-catalyzed ...