S-(pyridin-2-yl) (R)-2-((2R,4S,5S,6R)-6-((2R,4R)-4-((2R,4S,5S,6R)-6-((2R,3R)-2,3-dihydroxypentan-2-yl)-2-mesityl-5-methyl-1,3-dioxan-4-yl)-2-hydroxypentan-2-yl)-2-mesityl-5-methyl-1,3-dioxan-4-yl)propanethioate 以
xylene 为溶剂,
以70%的产率得到(1S,2R,4R,5R,7R,9S,10R,13R,14R,15R,17R,19S,20S)-13-Ethyl-4,14-dihydroxy-2,4,10,14,19,20-hexamethyl-7,17-bis-(2,4,6-trimethyl-phenyl)-6,8,12,16,18-pentaoxa-tricyclo[13.3.1.15,9]icosan-11-one