Environmentally benign synthesis of polyhydroquinolines by Co3O4–CNT as an efficient heterogeneous catalyst

• CNTs as an excellent support for the metal oxide in catalytic systems
• Introducing Co3O4–CNTs for the synthesis of polyhydroquinolines
• Generality of the catalyst, easiness of separation, and recycled several times

A novel and eco-friendly synthesis of polyhydroquinolines is efficiently catalyzed by Co3O4–CNT nanocomposites. This recyclable catalytic system provides a simple strategy to generate a variety of polyhydroquinolines under mild conditions. Utilization of easy reaction condition, recyclable nanocatalyst, reduced environmental impacts and simple work-up make this methodology an interesting option for the eco-friendly synthesis of polyhydroquinolines.

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