High Diversity on Simple Substrates: 1,4-Dihalo-2-butenes and Other Difunctionalized Allylic Halides for Copper-Catalyzed SN2′ Reactions
作者:Caroline A. Falciola、Alexandre Alexakis
DOI:10.1002/chem.200801309
日期:——
Enantioselective allylic alkylation with an organomagnesium reagent catalyzed by copper thiophene carboxylate (CuTC) was carried out on difunctionalized substrates, such as commercially available 1,4-dichloro-2-butene and 1,4-dibromo-2-butene, and on similar compounds of higher substitution pattern of the olefin for the formation of all-carbon chiral quaternary centers. The high regioselectivity obtained
对噻吩羧酸铜(CuTC)催化的有机镁试剂进行对映选择性烯丙基烷基化反应是在双官能化底物上进行的,例如市售的1,4-二氯-2-丁烯和1,4-二溴-2-丁烯,以及类似化合物全碳手性季中心形成烯烃的更高取代模式的研究。在整个反应过程中获得的高区域选择性有利于苯苯基格氏试剂的良好区域控制。其他双官能化的底物(烯丙基醚和烯丙醇)也经历了不对称的S(N)2'取代。