The Diels-Alder reaction is one of the most widely employed methods is synthetic chemistry.1,2)The applicability of this reaction to the synthesis of useful cycloadducts is, however, rather limited.3)A recent communication from our laboratory described a synthetic method for new dienes:trans-1,3-bis(trimethylsiloxy)-5-methylcyclohexa-1,3-diene (2); and illustrated their potential usefulness in the synthesis of Neotropical frog toxin (3) via Diels-Alder cycloadducts.4)