Selective dehydrofluorination of 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) to 2-chloro-3,3,3-trifluoropropene (HFO-1233xf) using nanoscopic aluminium fluoride catalysts at mild conditions

Add time:07/12/2019    Source:sciencedirect.com

Aluminium chlorofluoride (ACF, AlClxF3-x, x = 0.05-0.3) and high-surface aluminium fluoride (HS-AlF3) were tested as heterogeneous catalysts for the reactivity towards 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb), which is a potent greenhouse gas. Selective activation and dehydrofluorination of the CF bond was observed, under remarkable conditions, such as mild temperatures (70 °C) and without the need for a hydrogen source as a driving force. Consecutive reactions were developed by using C6D6 as a solvent or adding Et3SiH. Thus, the production of the dehydrofluorination product 2-chloro-3,3,3-trifluoropropene (HFO-1233xf) can be coupled to a hydroarylation or hydrodefluorination reaction in one-pot procedures.

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