Abstract:
A cobalt-catalyzed redox-neutral [4 + 2] annulation of oximes and alkynes in deep eutectic solvents comprising quaternary ammonium compounds and hydrogen bond donors has been developed, the best system being Me3N+CH2CO2- / HOCH(CF3)2. No external oxidizing reagent was required, and only water was generated as the secondary product. The catalytic system can be reused in three consecutive cycles.
Citation:
L. Wang, L. Zhang, L. Gong, “Cobalt(III)-catalyzed synthesis of isoquinolines from oximes and alkynes in deep eutectic solvents”, Mendeleev Commun., 33:2 (2023), 243–245
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https://www.mathnet.ru/eng/mendc363
https://www.mathnet.ru/eng/mendc/v33/i2/p243
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