Treatment of cyclic beta-keto esters with terminal alkynes in the presence of a catalytic amount of a rhenium complex, [ReBr(CO)(3)(thf)](2), gave bicyclo[3.3.1]nonene derivatives. The reaction conditions and yields of the bicyclo[3.3.1]nonenes were improved by the sequential use of tetrabutylammonium fluoride (TBAF) after the rhenium-catalyzed reactions.
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