Copper-catalyzed one-pot synthesis of tetrasubstituted pyrazoles from sulfonyl azides,terminal alkynes,and hydrazonoyl chlorides |
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Authors: | Issa Yavari Manijeh Nematpour Sima Yavari Fatemeh Sadeghizadeh |
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Institution: | Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran |
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Abstract: | Ketenimine intermediates generated by the addition of copper acetylides to sulfonyl azides are trapped by nitrile imines (generated from hydrazonoyl chlorides and triethylamine) to afford tetrasubstituted pyrazoles in moderate to good yields. |
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