(R)-4-((R)-1-hydroxy-1-methylprop-2-ynyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

N-((2R,3R)-1,3-dihydroxy-3-methylpent-4-yn-2-yl)-4-methylbenzenesulfonamide

(2R,3R)-3-methyl-2-(2-nitrobenzenesulfonylamino)pentane-1,3-diol

(2S,3S)-tert-butyldimethylsilyloxymethyl-2-ethyl-2-methyl-1-(2-nitrobenzenesulfonyl)aziridine

(2R,3R)-tert-butyldimethyl-[3-hydroxy-3-methyl-2-(2-nitrobenzenesulfonylamino)]-pent-4-ynoxysilane

(2S,3R)-3-(4-benzyloxy-3-{(R)-1-[(S)-((R)-2-benzyloxycarbonylamino-3-methylbutyrylamino)-(tert-butoxycarbonylmethylcarbamoy)methyl]-1-methylprop-2-ynyloxy}phenyl)-2-(tert-butoxycarbonylmethylamino)-3-hydroxypropionic acid benzyl ester

(R)-4-((R)-1-hydroxy-1-methylpropyl)-2,2-dimethyl oxazolidine-3-carboxylic acid tert-butyl ester

(2S,3R)-[3-hydroxy-3-methyl-2-(2-nitrobenzenesulfonylamino)pent-4-ynoylamino]acetic acid tert-butyl ester

(2R,3R)-tert-butyldimethyl-[3-methyl-3-hydroxy-2-(2-nitrobenzenesulfonylamino)]pentoxysilane

tert-butyl (R)-2,2-dimethyl-4-((R)-2-((trimethylsilyl)oxy)pent-3-yn-2-yl)oxazolidine-3-carboxylate

(2S,3S)-tert-butyldimethylsilyloxymethyl-2-ethynyl-2-methyl-1-(2-nitrobenzenesulfonyl)-aziridine