Results The reagent 1 is readily available on a multigram scale by two routes. Addition of phenylsulfenyl chloride to vinyltrimethylsilane gave the adduct la which, on dehydrodehalogenation with DBU, provides 1. Treatment of 3 with LDA at-78 OC, followed by C1SiMe3, also gave 1. The full details of these procedures have previously been rep~ rted.~
