The syntheses of several bistrimethylsilyl hydroxy alkynes and one tristrim
ethylsilyl hydroxy alkyne are described. Addition of lithium trimethylsilyl
acetylide to mono- or bistrimethylsilylated aldehydes and ketones afforded
compounds 4a-f in good to moderate yields. The products are mixtures of di
astereomers; the diastereoselectivity of the reactions amounts to 53 to 68%
.