Catalytic Intermolecular Ortho-Arylation of Phenols
作者:Robin B. Bedford、Michael E. Limmert
DOI:10.1021/jo030157k
日期:2003.10.1
catalysts such as [RhCl(PPh3)3] or [[RhCl(COD)]2] with PiPr2(OAr) or P(NMe2)3 co-catalysts allows the ortho-selective intermolecular arylation of phenols. The reaction proceeds via orthometalation of P-OAr groups and then transesterification liberates the product phenol. When 2-substituted phenols are used as substrates, [RhCl(PPh3)3]/iPr2(OAr) mixtures are typically the catalysts of choice, whereas for substrates
Synthesis of rare earth metal complexes based on phenol ether bidentate ligands and polymerization of 2-vinylpyridine
作者:Cui-Ting Han、Chao Yan、Tie-Qi Xu、Yong-Zheng Zhu
DOI:10.1016/j.poly.2021.115219
日期:2021.7
found that tetradentate phenol ether rare earth catalysts show highly isoselectivity for 2-vinylpyridine polymerization. In order to explore the influence of ether chain on 2-vinylpyridine polymerization, six rare earth complexes with bidentate phenol ester ligands with similar structures were synthesized. Polymerizations of 2-VP were also explored, the effects of metal centers and different kinds of