The ene-process with unsaturated ketones was catalyzed by Lewis acids such as bismuth or indium triflates. Unlike aldehydes, the reverse ene-process occurs with ketones, resulting in incomplete conversions, as shown by control experiments and analysis by ESI-MS.
The article was received on 21 May 2015, accepted on 22 Jul 2015 and first published on 23 Jul 2015
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