Palladium-Catalyzed Allylic Cross-Coupling Reactions of Primary and Secondary Homoallylic Electrophiles
作者:Benjamin J. Stokes、Susanne M. Opra、Matthew S. Sigman
DOI:10.1021/ja305403s
日期:2012.7.18
cross-coupling of homoallylic tosylate substrates using boronic acids and pinacol esters is reported. The reaction uses 2-(4,5-dihydro-2-oxazolyl)quinoline (quinox) as a ligand and is performed at ambient temperature. The scope of the reaction is broad in terms of both the boronate transmetalating reagent and the substrate and includes secondary tosylates. Mechanistic studies support an alkene-mediated
报道了使用硼酸和频哪醇酯的 Pd(0) 催化的高烯丙基甲苯磺酸酯底物的烯丙基交叉偶联。该反应使用 2-(4,5-二氢-2-恶唑基) 喹啉 (quinox) 作为配体并在环境温度下进行。就硼酸盐金属转移试剂和底物而言,反应范围很广,包括甲苯磺酸仲酯。机理研究支持未活化的初级和次级烷基甲苯磺酸盐的烯烃介导的 S(N)2 型立体转化氧化加成。