We recently required multigram quantities of 2-trimethylsiloxy-l, 3-butadiene (l), a versatile Diels-Alder reaction component used to synthesize a number of ring systems, including substituted pyranones,'pyridones? and cyclohexanones.'A number of methods exist for the synthesis of this compound, 3 the procedure outlined by Jung4 being the most convenient. Although, Jung's procedure