Abstract
Regioselective synthesis of 1,1-bis(methylthio)-6-nitro-5-arylhex-1-en-3-one has been achieved from α-alkenoylketene dithioacetals with nitromethane using l-proline catalyst via Michael addition. The synthesized compounds 3a–j were well characterised by NMR and mass spectral techniques. One of the structures was confirmed by single crystal XRD. The enantioselectivity and its specific rotation of synthesized compounds were analyzed. All the compounds were screened for their anti-oxidant property, most of the compounds having the ability to scavenge free radicals.
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Acknowledgements
The author thank UGC-MRP and DST-MRP, New Delhi, India, for financial assistance. We thank DST-IRPHA for funding towards high-resolution NMR spectroscopy. The author, AD, thanks Mr. D. Maheshwaran, School of Chemistry, Madurai Kamaraj University, Madurai, for his generous help in solving crystal data and also thanks Dr. Shakila Mohan, School of Biotechnology, Madurai Kamaraj University, for her benevolent help in acquiring the absorbance for the DPPH assay.
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Arun Divakar, M., Shanmugam, S. Synthesis of chiral α-carbonyl-δ-nitro-ketenedithioacetals via l-proline-catalyzed Michael addition reaction. Res Chem Intermed 43, 6863–6873 (2017). https://doi.org/10.1007/s11164-017-3025-1
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DOI: https://doi.org/10.1007/s11164-017-3025-1