(2S,3R,5R)-3-Azido-2-benzoyloxy-5-(2',3'-O-isopropylidene-5'-O-p-nitrobenzoyl-α-D-ribofuranosyloxy)cyclohexanone ethylene dithioacetal 在
sodium methylate 作用下,
以
甲醇 为溶剂,
以69%的产率得到(6S,7R,9R)-7-Azido-9-((3aR,4S,6R,6aR)-6-hydroxymethyl-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yloxy)-1,4-dithia-spiro[4.5]decan-6-ol