Continuous flow/waste-minimized synthesis of benzoxazoles catalysed by heterogeneous manganese systems
2019
Ferlin, Francesco | van der Hulst, Mitchell K. | Santoro, Stefano | Lanari, Daniela | Vaccaro, Luigi
Herein, we present our results on the development of a waste minimized protocol for the synthesis of 2-arylbenzoxazoles in continuous flow. Manganese-based heterogeneous catalysts were used in combination with cyclopentylmethyl ether as an environmentally friendly and safe reaction medium. The use of oxygen promotes the oxidative process ensuring at the same time a complete regeneration of the catalyst adopting a flow configuration which does not include the use of an additional mechanical pump. These features allowed for a faster synthesis compared to batch procedures with minimal metal leaching.
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