Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 86, Issue 24, Pages 17884-17895Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c02194
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Funding
- Science and Engineering Research Board (SERB), New Delhi [EMR/2016/001123]
- Council of Scientific and Industrial Research (CSIR), New Delhi [02(0345)/19/EMR-II]
- Institute of Eminence (IoE), B.H.U.
- University Grants Commission (UGC)
- Council of Scientific and Industrial Research (CSIR), New Delhi
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Glycosyl triazoles are efficient ligands for Cu-catalyzed Sonogashira reaction, overcoming challenges of sideways homocoupling reactions. High product yields can be achieved at 130 degrees C for various substrates, showing versatility of this catalytic system.
Glycosyl triazoles have been introduced as efficient ligands for the Cu-catalyzed Sonogashira reaction to overcome the challenges of sideways homocoupling reactions in Cu catalysis in this reaction. The atmospheric oxygen in a sealed tube did not affect the coupling, and no need of complete exclusion of oxygen was experienced in the presence of glycohybrid triazole ligand L3. High product yields were obtained at 130 degrees C for a variety of substrates including aliphatic and aromatic terminal alkynes and differently substituted aromatic halides including 9-bromo noscapine. In contrast, at room temperature, a very low loading of the L3-Cu catalytic system could produce excellent yields in Glaser coupling including homocoupling and heterocoupling of a variety of aliphatic and aromatic alkynes.
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