(2R,4S,5S,6S,7S,8S)-9-[(1,1-dimethylethyl)diphenylsilyloxy]-5-hydroxy-4,6,8-trimethyl-3-oxo-7-(triethylsilyloxy)nonan-2-yl benzoate 、
2,2,2-三氯代亚氨逐乙酸-4-甲氧基苄酯 在
scandium tris(trifluoromethanesulfonate) 作用下,
以
甲苯 为溶剂,
反应 1.0h,
以93%的产率得到(2R,4S,5S,6S,7S,8S)-9-[(1,1-dimethylethyl)diphenylsilyloxy]-5-(4-methoxyphenylmethoxy)-4,6,8-trimethyl-3-oxo-7-(triethylsilyloxy)nonan-2-yl benzoate