2-(二甲氧基甲基)-1,3,5-三甲基苯 、
methyl (2R,3S,4S,5R,6R,8R)-8-[(4S,5S,6R)-6-[(2R,3R)-2,3-dihydroxypentan-2-yl]-5-methyl-2-oxo-1,3-oxazinan-4-yl]-3,5,6-trihydroxy-2,4,6-trimethylnonanoate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以85%的产率得到(R)-2-[(2R,4S,5S,6R)-6-{(1R,3R)-3-[(4S,5S,6R)-6-((1R,2R)-1,2-Dihydroxy-1-methyl-butyl)-5-methyl-2-oxo-[1,3]oxazinan-4-yl]-1-hydroxy-1-methyl-butyl}-5-methyl-2-(2,4,6-trimethyl-phenyl)-[1,3]dioxan-4-yl]-propionic acid methyl ester