(R)-1-{(4S,5S)-5-[(E)-3-{[(allyloxy)carbonyl]oxy}-2-methylbuta-1,3-dien-1-yl]-2,2-dimethyl-1,3-dioxolan-4-yl}-3-methylbut-3-en-2-yl benzoate 在
2,6-二叔丁基-4-甲基苯酚 作用下,
以
邻二氯苯 为溶剂,
反应 24.0h,
以52%的产率得到(3aS,5R,5aR,9aS,9bS)-8-{[(allyloxy)carbonyl]oxy}-2,2,5a,9-tetramethyl-3a,4,5,5a,6,7,9a,9b-octahydronaphtho[1,2-d][1,3]dioxol-5-yl benzoate