Abstract
TfOH was proved to be an efficient catalyst to promote the intra-molecular cyclization, Diels-Alder reaction, deprotonation and dehydration, and provided a concise synthesis of 10-benzoyl-3,4-dihydroanthracen-1(2H)-ones in good yields from a reaction of 2-(phenylethynyl) benzaldehyde and cyclohexane-1,3-dione. It underwent in high regioselectivity when center asymmetrical 4,4-dimethylcyclohexane-1,3-dione was used as a reactant.
Graphical Abstract
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TfOH was proved to be an efficient catalyst to promote a reaction of 2-(phenylethynyl) benzaldehyde and cyclohexane-1,3-dione to provide a concise procedure for the synthesis of 10-benzoyl-3,4-dihydroanthracen-1(2H)-ones in good yields.