(5S,8S,9R)-8-benzoyl-2-((1S,2S,E)-1,2-dihydroxyoct-3-en-1-yl)-9-hydroxy-8-methoxy-3-methyl-1-oxa-7-azaspiro[4.4]non-2-ene-4,6-dione 在
10% palladium on carbon 、
氢气 作用下,
以
乙醇 为溶剂,
以53%的产率得到(5S,8S,9R)-8-benzoyl-2-[(1S,2S)-1,2-dihydroxyoctyl]-9-hydroxy-8-methoxy-3-methyl-1-oxa-7-azaspiro[4.4]non-2-ene-4,6-dione