ethyl (2Z,5R,6Z,8R)-8-acetoxy-8-((4R,5S)-5-((S)-1-acetoxyethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)-5-hydroxyocta-2,6-dienoate 在
4-甲基苯磺酸吡啶 作用下,
以
苯 为溶剂,
以60%的产率得到acetic acid 1-[5-(1-acetoxy-ethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-3-(6-oxo-3,6-dihydro-2H-pyran-2-yl)-allyl ester