Reaction of indium ate complexes with allylic compounds. Controlling SN2/SN2′ selectivity by solvents
作者:Tsunehisa Hirashita、Yousuke Hayashi、Kazuma Mitsui、Shuki Araki
DOI:10.1016/j.tetlet.2004.02.129
日期:2004.4
giving a regioisomeric mixture of SN2 and SN2′ products. The ratio of SN2/SN2′ selectivity can be controlled by solvents; in the presence of polar solvents, such as N-butylpyrrolidone (NBP) and THF, the SN2′ product was mainly obtained, whereas the SN2 product was selectively prepared in solutions containing hexane. The vinylindium compound, generated by the reaction of allylic-type diindium reagents
制备了乙烯基和甲基铟酸酯复合物(硬脂酸酯),并研究了向肉桂酰溴的迁移趋势和区域选择性。乙烯基组更优选大于Me基团转移,给出的S上的区域异构体混合物Ñ 2和S Ñ 2'的产品。S N 2 / S N 2'选择性的比率可以通过溶剂来控制。在极性溶剂(例如N-丁基吡咯烷酮(NBP)和THF)存在下,主要获得S N 2'产物,而S N在含有己烷的溶液中选择性制备2种产物。由烯丙基型二铟试剂与亚胺反应生成的乙烯基铟化合物也被转化为相应的乙烯基吲哚,使其与烯丙基氯反应,得到三组分偶联产物。