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Abstract
In this study, we report a copper-catalyzed ligand-free Cadiot-Chodkiewicz coupling reaction. No additives or ligands are required for this Cu-catalyzed C(sp)-C(sp) coupling reaction of terminal alkynes with alkynyl halides. The low cost of copper catalyst, excellent yield of the products, suppression of side-products and mild reaction conditions are the major advantages of this protocol.
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Funding
GA and SA(2) thank the Kerala State Council for Science, Technology and Environment (KSCSTE), Trivandrum, India (Order No. 341/2013/KSCSTE dated 15.03.2013) for financial support. SA(1) and AMT thank the Council for Scientific and Industrial Research (CSIR), New Delhi-India for junior research fellowships. KRR and SMU thank the University Grants Commission (UGC), New Delhi-India for junior research fellowships. KKK thanks the Ministry of social justice and empowerment, UGC, New Delhi for the award of Rajiv Gandhi National Fellowship.