(2R,5R,8R)-8-[(1R,3S)-1-Benzyloxymethyl-3-(4-methoxy-phenyl)-8-methyl-7,9-dioxo-2,4-dithia-6,8-diaza-bicyclo[3.2.2]non-6-yl]-2,3,3-trimethyl-4-oxo-1-oxa-spiro[4.4]non-6-ene-7-carbaldehyde 在
二异丁基氢化铝 作用下,
以
四氢呋喃 为溶剂,
反应 14.0h,
以83%的产率得到(1R,3S)-1-Benzyloxymethyl-6-((2R,5R,7R)-8-hydroxymethyl-2,3,3-trimethyl-4-oxo-1-oxa-spiro[4.4]non-8-en-7-yl)-3-(4-methoxy-phenyl)-8-methyl-2,4-dithia-6,8-diaza-bicyclo[3.2.2]nonane-7,9-dione