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Updated: Jan 7, 2026

Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts
Published on: February 24, 2015
Synthesis of Substituted Acridones and Pyranoacridines through Metal-Catalyzed C-H Bond Activation Strategy
Ramesh Sanjana1, Kanniyappan Parthasarathy1
1Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu 600025, India.
Abstract:
An efficient rhodium(III)-catalyzed oxidative bis-Heck-type olefination of acridone has been demonstrated using a C-H bond activation strategy. This reaction works very well with various acrylates and styrenes. Additionally, the synthesis of different pyranoacridines via a ruthenium(II)-catalyzed annulation protocol has also been achieved. The described protocols are quite compatible with various functional groups, and the desired products are isolated in moderate to good yields. Further, the preliminary photophysical properties of the synthesized pyranoacridines have also been studied.
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