7 cedure is efficient, indicating that all of the individual reaction steps including the introduction of the trimethylsilyl group into the" bay" position occur without difficulty. As expected on the basis of the properties of 6, 7 could be isolated by column chromatography and was obtained as a waxy solid, mp 38-42" C. Solid 7 has been stored under N2 at-10" C for several months without evidence of decomposition or polymerization; however, ...