(1R,2R,4S,5S)-4,5-dicyclohexyl-2-[2-azido-1-bromo-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]-1,3,2-dioxaborolane

(1R,2S,4S,5S)-4,5-dicyclohexyl-2-[2-azido-1-cyanomethyl-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]-1,3,2-dioxaborolane

[2(1R,2R,3S),4S,5S]-4,5-dicyclohexyl-2-[3-azido-1-bromo-2-cyanomethyl-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]butyl]-1,3,2-dioxaborolane