(R)-1-((4S,5R)-5-ethynyl-2,2-dimethyl-1,3-dioxolan-4-yl)-2-hydroxyethyl 4-nitrobenzoate

tert-butyl((S)-1-((4S,5R)-5-ethynyl-2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethoxyethoxy)dimethylsilane

((S)-1-((4S,5R)-5-((Z)-2-bromovinyl)-2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethoxyethoxy)(tert-butyl)dimethylsilane

tert-butyl((S)-1-((4S,5R)-5-((Z)-2-iodovinyl)-2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethoxyethoxy)dimethylsilane

(3R,4S,5R)-5-(tert-butyldimethylsilyloxy)-3,4-(isopropylidenedioxy)-6-(triphenylmethoxy)hex-1-yne