(1R,2R,5R,6R,9R,10R,12S,14R)-5-ethyl-6,14-dihydroxy-2,6,10,12-tetramethyl-9-phenylmethoxy-4,15-dioxabicyclo[10.2.1]pentadecane-3,7,13-trione 、
乙酸酐 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
以70%的产率得到[(1R,2R,5R,6R,9R,10R,12S,14R)-5-ethyl-6-hydroxy-2,6,10,12-tetramethyl-3,7,13-trioxo-9-phenylmethoxy-4,15-dioxabicyclo[10.2.1]pentadecan-14-yl] acetate