methoxymethyl (3S,6aR,8aS,9R,12aR,12bS)-3-hydroxy-9,12a-dimethyl-5-oxo-4-(tosylmethyl)tetradecahydro-3,6a-methanonaphtho[2,1-b]oxocine-9-carboxylate 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
四氢呋喃 为溶剂,
以69.9%的产率得到methoxymethyl (3S,6aR,8aS,9R,12aR,12bS)-3-hydroxy-9,12a-dimethyl-4-methylene-5-oxotetradecahydro-3,6a-methanonaphtho[2,1-b]oxocine-9-carboxylate