(R)-3-(tert butyldimethylsilyloxy)-1-trimethylsilyl-hex-5-en-1-yne

(3R)-3-(tert-butyldimethylsiloxy)-5-iodo-1-(trimethylsilyl)pent-1-yne

(2S,3S)-4-(p-methoxybenzyloxy)-2,3-epoxybutanal

1-(trimethylsilyl)-5-(triphenylmethoxy)pent-1-yn-3-one

1-Trimethylsilanyl-5-trityloxy-pent-1-yn-3-ol