(5R,7R,8S,9R)-8,9-Bis-(tert-butyl-dimethyl-silanyloxy)-7-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-6-oxa-1,3-diaza-spiro[4.4]nonane-2,4-dione 在
溶剂黄146 作用下,
反应 1.0h,
以87%的产率得到(5R,7R,8S,9R)-8,9-Bis-(tert-butyl-dimethyl-silanyloxy)-7-((R)-1,2-dihydroxy-ethyl)-6-oxa-1,3-diaza-spiro[4.4]nonane-2,4-dione