benzyl (1S,2R,3R,4aR,6aS,7R,8R,10aR,10bR,12aR)-3-methoxy-1,6a,8,10a-tetramethyl-2-(3-methyl-2-methylenebutoxy)-8-((R)-3-methylbutan-2-yl)-1,3,4,6,6a,7,8,9,10,10a,10b,11,12,12a-tetradecahydro-2H-1,4a-(methanooxymethano)chrysene-7-carboxylate 在
2,6-二甲基吡啶 、
sodium periodate 、
四氧化锇 作用下,
以
1,4-二氧六环 、
水 、
叔丁醇 为溶剂,
反应 16.0h,
生成
benzyl (1R,5S,6R,7R,10R,11R,14R,15S,20R,21R)-20-methoxy-5,7,10,15-tetramethyl-7-[(2R)-3-methylbutan-2-yl]-21-(3-methyl-2-oxobutoxy)-17-oxapentacyclo[13.3.3.01,14.02,11.05,10]henicos-2-ene-6-carboxylate