The regiochemical outcome of the ring opening of 1:2-epoxides through chelation processes assisted by metal ions, was verified in mono- and difunctionalized aliphatic oxirane systems bearing the heterofunctionality (OR) in an homoallylic and/or allylic relationship to the oxirane ring. The effect of the distance of the OR functionality from the oxirane ring and of the type of protective group on the
通过单官能和双官能的脂族
环氧乙烷体系在与
环氧乙烷环呈均烯丙基和/或烯丙基关系的杂官能度(OR)中验证了通过
金属离子辅助的螯合过程使1:2-
环氧化物开环的区域
化学结果。检查了OR官能团与
环氧乙烷环的距离以及保护基类型对这些系统的区域
化学结果的影响。在某些情况下,使用LiClO 4或Mg(ClO 4)2作为促进
金属盐使得有可能获得良好的区域交替方法。