Reactions of a series of unsaturated bicyclic [2.2.n] endoperoxides with allyltrimethylsilane in the presence TMSOTf or SnCl4 provides the cis-configured endoperoxides 9a–12. It is proposed that this novel reaction proceeds via attack of the allylsilane on the carbocation derived from heterolytic cleavage of the endoperoxide bridge. The reaction proceeds with a high degree of diastereoselectivity and
一系列不饱和双环的反应[2.2。n ]内过氧化物与烯丙基三甲基
硅烷在TMSOTf或SnCl 4存在下提供顺式构型的内过氧化物9a - 12。提出该新反应是通过烯丙基
硅烷对源自内过氧化物桥的杂合裂解的碳阳离子的攻击而进行的。反应以高度的非对映选择性进行,我们建议使用大体积的–CH 2 SiMe 3取代基以类似产物的过渡态处于赤道位置。与Fenozan B0-7相比,这些化合物在体外显示出较差的抗疟疾活性,而对
氯喹具有抗性的寄生虫则如此。