Direct preparation of benzylic manganese reagents from benzyl halides, sulfonates, and phosphates and their reactions: applications in organic synthesis
作者:YoungSung Suh、Jun-sik Lee、Seoung-Hoi Kim、Reuben D Rieke
DOI:10.1016/s0022-328x(03)00500-x
日期:2003.11
The use of highly active manganese (Mn)*, prepared by the Rieke method, was investigated for the direct preparation of benzylic manganese reagents. The oxidative addition of the highly active manganese to benzylic halides was easily completed under mild conditions. Moreover, benzylic manganese sulfonates and phosphates were prepared by direct oxidative addition of Mn* to the carbon–oxygen bonds of
An amphiphilic, catalytically active, vitamin B<sub>12</sub> derivative
作者:M. Giedyk、S. N. Fedosov、D. Gryko
DOI:10.1039/c4cc01064g
日期:——
The reaction of vitamin B12 with DMF-DMA and MeOH as a nucleophile affords cobalester, the first amphiphilic cobalamin derivative which is able to catalyze C–C bond forming reactions.
Mixed Alkyl/Aryl Diphos Ligands for Iron‐Catalyzed Negishi and Kumada Cross Coupling Towards the Synthesis of Diarylmethane
作者:Xufeng Ma、Han Wang、Yao Liu、Xing Zhao、Jun Zhang
DOI:10.1002/cctc.202101237
日期:2021.12.15
C−C coupling: Iron catalysts supported by mixed alkyl/aryl diphos ligands exhibited efficient reactivities in both Negishi and Kumada coupling towards the synthesis of diarylmethane with enhanced activity and selectivity. The electron-rich mixed PPh2/PCy2 ligands outperformed their symmetrical PPh2 congeners, and led to decreased homocoupling byproduct formation.
REDUCTIVE COUPLING OF BENZYL HALIDES USING NICKEL(0)-COMPLEX GENERATED IN SITU IN THE PRESENCE OF TETRAETHYLAMMONIUM IODIDE, A SIMPLE AND CONVENIENT SYNTHESIS OF BIBENZYLS
作者:Masahiko Iyoda、Masahiro Sakaitan、Hiroki Otsuka、Masaji Oda
DOI:10.1246/cl.1985.127
日期:1985.1.5
Zerovalentnickel complex generated in situ by reduction of NiBr2(PPh3)2 with zinc powder in the presence of Et4NI was found to be an effective catalyst for homo-coupling of benzyl halides. The catalytic reactions proceeded smoothly in various solvents under mild conditions to afford dehalogenative-coupling products in good to high yields.