(3'S,3aR,5R,6S,6aR)-3'-chloro-5-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethylspiro[5,6a-dihydro-3aH-furo[2,3-d][1,3]dioxole-6,2'-oxirane] 在
sodium azide 、
15-冠醚-5 作用下,
以
二甲基亚砜 为溶剂,
以65%的产率得到(3aR,5S,6R,6aR)-6-Azido-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxole-6-carbaldehyde