在
palladium dihydroxide 氢气 作用下,
以
甲醇 为溶剂,
反应 100.0h,
以71%的产率得到(1S,3R,4R,5R,7R,8R,9R,10S,12S,14R,16S,17S,18R,19S,21R)-7-[(2R,3R,4R,4aS,6S,7R,8aS)-6-[(1R,3R)-4-[(2S,3R,4R,4aS,6S,7R,8aS)-6-ethyl-3,4,7-trihydroxy-2,3,4,4a,6,7,8,8a-octahydropyrano[3,2-b]pyran-2-yl]-1,3-dihydroxybutyl]-3,4,7-trihydroxy-2,3,4,4a,6,7,8,8a-octahydropyrano[3,2-b]pyran-2-yl]-19-(2-hydroxyethyl)-2,6,11,15,20-pentaoxapentacyclo[12.8.0.03,12.05,10.016,21]docosane-4,8,9,17,18-pentol