Reactions between 2-chloromethyl-3-trimethylsilyl-1-propene 1 and N-acyliminium ions, which were generated in situ from α-methoxy or α-acetoxy amides 2, give allylic chlorides 3 in good yields and high stereoselectivities. The allylic chlorides 3 were further transformed to bicyclic methylenepyrrolidines 4 which are building blocks for pharmacologically interesting compounds.
2-chloromethyl-3-trimethylsilyl-1-propene 1 与 N-acyliminium 离子(由δ-甲氧基或δ-乙酰氧基酰胺 2 原位生成)发生反应,生成烯丙基
氯化物 3,产率高,立体选择性强。烯丙基
氯化物 3 可进一步转化为双环亚甲基
吡咯烷 4,后者是具有药理学意义的化合物的组成单元。