An α‐diimine Pd(II) complex containing chiral sec‐phenethyl groups, bis[N,N′‐(4‐methyl‐2‐sec‐phenethylphenyl)imino]‐2,3‐butadiene}dichloropalladium (rac‐C1), was synthesized and characterized. rac‐C1 was applied as an efficient catalyst for the Suzuki–Miyaura cross‐coupling reaction between various aniline halides and arylboronic acid in PEG‐400–H2O at room temperature. Among a series of aniline halides
Palladium-Catalyzed Directed Atroposelective C–H Allylation via β-H Elimination: 1,1-Disubstituted Alkenes as Allyl Surrogates
作者:Bei-Bei Zhan、Zhen-Sheng Jia、Jun Luo、Liang Jin、Xu-Feng Lin、Bing-Feng Shi
DOI:10.1021/acs.orglett.0c03757
日期:2020.12.18
C–H allylation with 1,1-disubstituted alkenes via β-H elimination remains challenging, because of the low reactivity and difficulty of controlling selectivity. Herein, the development of a Pd(II)-catalyzed directed atroposelective C–H allylation with methacrylates is described. Exclusive allylic selectivity was achieved. A vast array of axially chiral biaryl-2-amines are efficiently synthesized with
Synthesis of Axially Chiral Biaryl‐2‐amines by Pd
<sup>II</sup>
‐Catalyzed Free‐Amine‐Directed Atroposelective C−H Olefination
作者:Bei‐Bei Zhan、Lei Wang、Jun Luo、Xu‐Feng Lin、Bing‐Feng Shi
DOI:10.1002/anie.201915674
日期:2020.2.24
A simple and ubiquitously present group, free amine, is used as a directing group to synthesize axially chiral biaryl compounds by PdII -catalyzed atroposelective C-H olefination. A broad range of axially chiral biaryl-2-amines can be obtained in good yields with high enantioselectivities (up to 97 % ee). Chiral spiro phosphoricacid (SPA) proved to be an efficient ligand and the loading could be reduced
Pd Complex-Promoted Cyclopolymerization of Functionalized α,ω-Dienes and Copolymerization with Ethylene to Afford Polymers with Cyclic Repeating Units
作者:Sehoon Park、Daisuke Takeuchi、Kohtaro Osakada
DOI:10.1021/ja058408p
日期:2006.3.1
The Pd(II)-diimine catalysts initiate cyclopolymerization of isopropylidene diallylmalonate (I) to produce the polymer containing trans-1,2-disubstituted cyclopentane groups. Use of Pd complexes with a C2-symmetric ligand afforded the polymer with highly regulated tacticity. The polymerization of isopropylidene diallylmalonate in ethylene atmosphere gives the polyethylene with up to 42% comonomer incorporation.
[EN] HOMOPOLYMER AND COPOLYMER, AND PRODUCTION PROCESS THEREOF<br/>[FR] HOMOPOLYMERE ET COPOLYMERE, ET LEUR PROCEDE DE FABRICATION
申请人:SUMITOMO CHEMICAL CO
公开号:WO2007023618A1
公开(公告)日:2007-03-01
[EN] A homopolymer having a monomer unit such as an isopropylidene diallylmalonate unit; a process for producing said homopolymer comprising the step of homopolymerising a monomer such as isopropylidene diallylmalonate; a copolymer containing said monomer unit and an ethylene unit and/or alpha-olefin unit; and a process for producing said copolymer comprising the step of copolymerizing a monomer such as isopropylidene diallylmalonate with at least ethylene and/or an alpha-olefin. [FR] L'invention concerne un homopolymère comportant une unité monomère telle qu'une unité d'isopropylidène diallylmalonate ; un procédé de fabrication dudit homopolymère comprenant une étape d'homopolymérisation d'un monomère tel que l'isopropylidène diallylmalonate ; un copolymère contenant ladite unité monomère et une unité d'éthylène et/ou une unité d'alpha-oléfine ; et un procédé de fabrication dudit copolymère comprenant une étape de copolymérisation d'un monomère tel que l'isopropylidène diallylmalonate avec au moins de l'éthylène et/ou une alpha-oléfine.