Diels-Alder reactions of bis(spirodienone) derivatives of calix[4]arene with acetylenes: highly regio- and stereoselective synthesis of bisbicyclo[2.2.2]octenone derivatives
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Diels-Alder reactions of bis(spirodienone) derivatives of calix[4]arene with acetylenes: highly regio- and stereoselective synthesis of bisbicyclo[2.2.2]octenone derivatives
Highly regio- and stereoselective Diels-Alder reactions of bis(spirodienone) derivatives of calix[4]arene with acetylenes that provide easy access to bisbicyclo[2.2.2]octenones are described.