Abstract: The regiochemistry and stoichiometry of the hydroboration of simple I- silylacetylenes with 9-borabicyclo [3.3. I Inonane (9-BBN) was examined in detail.(Trimethylsily1) acetylene (IC) results in only@-mono-and dihydroboration products, behavior common to nonsilylated terminal acetylenes. It is less reactive than its alkyl counterparts toward 9-BBN. It was also demonstrated that (1-trimethylsilyl) alkynes form (a ...
