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-(4-methyl-3-oxopentan-2-yl)oxy-17-oxapentacyclo[13.3.3.01,14.02,11.05,10]henicos-2-ene-6-carboxylate 、
叔丁基亚磺酰胺 在
titanium(IV) tetraethanolate 作用下,
以
甲苯 为溶剂,
反应 16.0h,
生成 benzyl (1R,5S,6R,7R,10R,11R,14R,15S,20R,21R)-21-(3-tert-butylsulfinylimino-4-methylpentan-2-yl)oxy-20-methoxy-5,7,10,15-tetramethyl-7-[(2R)-3-methylbutan-2-yl]-17-oxapentacyclo[13.3.3.01,14.02,11.05,10]henicos-2-ene-6-carboxylate