A Convenient Synthesis of 3,4-bis(Trimethylsilylmethyl)-5,6-dihydro-2H-pyrans Through a Catalyzed Hetero Diels-Alder Reaction

Abstract
In the presence of boron trifluoride etherate, 2,3-bis(trimethylsilylmethyl)-1,3-butadiene reacts with aldehydes and ketones to lead generally to an only product, resulting from an hetero Diels-Alder reaction.