<<3-(2R,3R,4S,5S),4R>-3-(3,5-Dihydrox-2,4,6-trimethyl-1-oxo-heptyl)-4-(phenylmethyl)>-2-oxazolidinone 、
2,2-二甲氧基丙烷 在
camphor-10-sulfonic acid 作用下,
以
丙酮 为溶剂,
以81%的产率得到<4S,5S,6R,6(1R,2(4R))>-4-(1-Methyl-ethyl)-6-(1-methyl-2-oxo-2-N-(4-(phenylmethyl)-2-oxazolidinyl))-2,2,5-trimethyl-1,3-dioxane