tert-Butyl 2-deoxy-4,5-O-isopropylidene-D-gluconate

(4R)-4-(2-Allyl-2H-1,2,3-triazol-4-yl)-1,2-O-isopropylidene-L-threose

X-ray crystallography unequivocally confirmed the structure of the title compound, C₁₂H₁₇N₃O₄, as (4R)-4-(2-allyl-2H-1,2,3-triazol-4-yl)-1,2-O-isopropyl­idene-l-threose. The absolute configuration was determined by the use of d-glucorono-3,6-lactone as the starting material. The crystal structure consists of hydrogen-bonded chains of mol­ecules running parallel to the a axis. There are no unusual packing features.