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
Nickel-Catalyzed Allylic Substitution of Simple Alkenes
作者:Ryosuke Matsubara、Timothy F. Jamison
DOI:10.1002/asia.201000875
日期:2011.7.4
This report describes a nickel‐catalyzed allylic substitution process of simplealkenes whereby an important structural motif, a 1,4‐diene, was prepared. The key to success is the use of an appropriate nickel–phosphine complex and a stoichiometric amount of silyl triflate. Reactions of 1‐alkyl‐substituted alkenes consistently provided 1,1‐disubstituted alkenes with high selectivity. Insight into the
Palladium-Catalyzed Enantioselective Hydrohydrazonation of 1,3-Dienes
作者:Shaozi Sun、Qinglong Zhang、Weiwei Zi
DOI:10.1021/acs.orglett.3c02729
日期:2023.12.1
We presented a method for synthesizing allylic chiral hydrazones from 1,4-disubstituted 1,3-dienes and hydrazones through a (R)-DTBM-Segphos-Pd(0)-catalyzed hydrohydrazonation reaction. This transformation has a wide range of substrates and good functional group tolerance. The desired products were obtained in medium to high yield and good regio- and enantioselectivity. Synthetic transformation of
我们提出了一种通过 ( R )-DTBM-Segphos-Pd(0) 催化的氢腙反应从 1,4-二取代 1,3-二烯和腙合成烯丙基手性腙的方法。该转化具有广泛的底物范围和良好的官能团耐受性。以中等至高产率和良好的区域选择性和对映选择性获得了所需产物。证明了产物合成转化为各种含氮手性化合物。