手性配体和催化剂发现的手性结构的开发对于不对称催化至关重要。在此,我们报告了以 Si 为中心的螺环骨架、spirobiphenoxasilin-diol (SPOSiOL) 及其衍生手性配体的简明合成。使用化学拆分方法,可以在克级以高产率获得光学 SPOSiOL。初步研究表明,该配体支架在过渡金属催化的不对称反应中具有巨大潜力。这一发现进一步强调了以 Si 为中心的螺环支架在不对称催化中具有重要价值。
手性配体和催化剂发现的手性结构的开发对于不对称催化至关重要。在此,我们报告了以 Si 为中心的螺环骨架、spirobiphenoxasilin-diol (SPOSiOL) 及其衍生手性配体的简明合成。使用化学拆分方法,可以在克级以高产率获得光学 SPOSiOL。初步研究表明,该配体支架在过渡金属催化的不对称反应中具有巨大潜力。这一发现进一步强调了以 Si 为中心的螺环支架在不对称催化中具有重要价值。
Oxyarylation and Aminoarylation of Styrenes Using Photoredox Catalysis
作者:Gabriele Fumagalli、Scott Boyd、Michael F. Greaney
DOI:10.1021/ol401940c
日期:2013.9.6
A three-component coupling of styrenes is reported, using photoredoxcatalysis to achieve simultaneous arylation and C–O or C–N bond formation across the styrene double bond.
Quinoline Ligands Improve the Classic Direct C−H Functionalisation/Intramolecular Cyclisation of Diaryl Ethers to Dibenzofurans
作者:Katrina Mackey、David J. Jones、Leticia M. Pardo、Gerard P. McGlacken
DOI:10.1002/ejoc.202001416
日期:2021.1.22
Intramolecular arylation through direct C−H functionalisation is a convenient method for the formation of dibenzofurans. In the Pd‐mediated process, the use of quinoline ligands alleviates a number of the existing issues with the use of phosphineligands.
Enantioselective Cu-Catalyzed Arylation of Secondary Phosphine Oxides with Diaryliodonium Salts toward the Synthesis of P-Chiral Phosphines
作者:Rodolphe Beaud、Robert J. Phipps、Matthew J. Gaunt
DOI:10.1021/jacs.6b09334
日期:2016.10.12
Catalytic synthesis of nonracemic P-chiralphosphine derivatives remains a significant challenge. Here we report Cu-catalyzed enantioselective arylation of secondary phosphine oxides with diaryliodonium salts for the synthesis of tertiary phosphine oxides with high enantiomeric excess. The new process is demonstrated on a wide range of substrates and leads to products that are well-established P-chiral
Palladium-Catalyzed Regioselective C-5 Arylation of 1,2,3-Triazoles with Diaryliodonium Salts
作者:Zhengyin Du、Hua Feng、Fangli Gang、Yang Che、Ying Fu
DOI:10.1055/s-0036-1588815
日期:2017.8
An effective method for C-5 arylation of 1,4-disubstituted 1,2,3-triazoles and C-5 regioselective arylation of 1-substituted 1,2,3-triazoles via sp2 C–H activation with palladium as a catalyst and diaryliodoniumsalts as arylating reagents is described. Various electron-rich and electron-deficient substituents attached to triazoles and diaryliodoniumsalts were tolerable to give the desired products
Metal-Free Synthesis of Unsymmetrical Organoselenides and Selenoglycosides
作者:Yong Guan、Steven D. Townsend
DOI:10.1021/acs.orglett.7b02526
日期:2017.10.6
A one-pot, metal-free procedure has been developed to synthesize unsymmetrical organoselenides. In the first step of the reaction, arylation of potassium selenocyanate (KSeCN) with an iodonium reagent proceeds in the absence of a metal catalyst to produce an arylselenocyanate. In the second step, treatment with sodium borohydride unmasks a second selenium nucleophile that engages an aliphatic electrophile