ethyl (2R)-2-[(3'aR,6'aR)-2',2'-dimethylspiro[1,3-dioxolane-2,5'-3,4,6,6a-tetrahydro-1H-pentalene]-3'a-yl]pent-4-enoate 在
KH in paraffin 作用下,
以
甲苯 为溶剂,
反应 3.0h,
以127 mg的产率得到ethyl (2S)-2-[(3'aR,6'aR)-2',2'-dimethylspiro[1,3-dioxolane-2,5'-3,4,6,6a-tetrahydro-1H-pentalene]-3'a-yl]pent-4-enoate