38053-75-7Relevant academic research and scientific papers
Homogeneous Palladium-Catalyzed Selective Reduction of 2,2′-Biphenols Using HCO 2H as Hydrogen Source
Li, Ruoling,Li, Chenchen,Yang, Wen,Zhao, Wanxiang
, p. 1605 - 1618 (2021/02/01)
An efficient homogeneous palladium-catalyzed selective deoxygenation of 2,2′-biphenols by reduction of aryl triflates with HCO 2H as the hydrogen source is reported. This protocol complements the current method based on heterogeneous Pd/C-catalyzed hydrogenation with hydrogen gas. This process provided the reduction products in good to excellent yields, which could be readily converted to various synthetically useful molecules, especially ligands for catalytic synthesis.
Asymmetric Synthesis of Axially Chiral 2-Aminobiaryls by Rhodium-Catalyzed Benzannulation of 1-Arylalkynes with 2-(Cyanomethyl)phenylboronates
Xue, Fei,Hayashi, Tamio
supporting information, p. 10368 - 10372 (2018/07/31)
Asymmetric benzannulation of 1-arylalkynes, where the aryl group is an ortho-substituted aromatic group, with 2-(cyanomethyl)phenylboronate was catalyzed by a rhodium complex coordinated with a chiral diene ligand to give high yields of axially chiral 2-aminobiaryls with greater than 90 % ee.
METALLATED BENZYLSILANES AND THEIR USE AS POLYMERIZATION INITIATORS
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Page/Page column 31, (2018/09/12)
The invention relates to novel compounds useful as polymerization initiators or precursors for polymerization initiators. The invention further relates to a method of making the polymerization initiators and resulting polymers. The invention also relates
The design of second generation MOP-phosphonites: Efficient chiral hydrosilylation of functionalised styrenes
Fleming, James T.,Ficks, Arne,Waddell, Paul G.,Harrington, Ross W.,Higham, Lee J.
supporting information, p. 1886 - 1890 (2016/02/09)
A series of enantiopure MOP-phosphonite ligands, with tailored steric profiles, have been synthesised and are proven to be very successful in high-yielding, regio- and enantioselective catalytic hydrosilylation reactions of substituted styrenes, affording important chiral secondary alcohols.
When Chirality Meets “Buchwald-Type” Phosphines: Synthesis and Evaluation in Frustrated Lewis Pair-, Lewis Base- and Palladium-Promoted Asymmetric Catalysis
Fer, Micka?l J.,Cinqualbre, Joséphine,Bortoluzzi, Julien,Chessé, Matthieu,Leroux, Frédéric R.,Panossian, Armen
, p. 4545 - 4553 (2016/09/23)
We describe the synthesis of axially chiral “Buchwald ligand”-like biphenylphosphines in highly enantioenriched form. These monodentate phosphines, biphenyl analogues of Hayashi's MOP ligands, were evaluated in phosphine-promoted organocatalysis and in hydrosilylations catalyzed by palladium or by frustrated Lewis pairs. As expected, the title phosphines appeared best suited for transition metal catalysis where they provided higher asymmetric induction.
Asymmetric Suzuki-Miyaura cross-coupling for the synthesis of chiral biaryl compounds as potential monophosphine ligands
Ma, Yan-Na,Yang, Shang-Dong
, p. 6673 - 6677 (2015/04/27)
Efficient asymmetric Suzuki-Miyaura coupling reactions have been employed for the first time to synthesize chiral biaryl compounds with phosphinate groups as chiral auxiliaries. A series of functionalized chiral biaryls are thereby synthesized in excellent yields and good diastereoselectivities (up to >95:5 d.r.) and axially chiral monophosphorus ligands are obtained through further functionalizations.
ACTIVATED HALO-CONTAINING ARALKYLSILANE
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Paragraph 0090, (2016/01/12)
The invention is directed to an activated halo-containing aralkylsilanes possessing at least one hydrolyzable group bonded to a silicon atom and at least one halo functional group bonded to a carbon atom to which both the silicon atom and an aromatic grou
Poly(quinoxaline-2,3-diyl)s bearing (S)-3-octyloxymethyl side chains as an efficient amplifier of alkane solvent effect leading to switch of main-chain helical chirality
Nagata, Yuuya,Nishikawa, Tsuyoshi,Suginome, Michinori
supporting information, p. 15901 - 15904 (2015/02/19)
Poly(quinoxaline-2,3-diyl) containing (S)-3-octyloxymethyl side chains was synthesized to investigate the induction of a single-handed helical sense to the main chain in various alkane solvents. The polymer showed an efficient solvent dependent helix inversion between n-octane (M-helix) and cyclooctane (P-helix). After a screening of alkane solvents, it was found that linear alkanes having large molecular aspect ratios induced M-helical structure, and branched or cyclic alkanes having small molecular aspect ratios induced P-helical structure. A polymer ligand containing (S)-3-octyloxymethyl side chains and diphenylphosphino pendants also exhibited solvent-dependent helical inversion between n-octane and cyclooctane, leading to the highly enantioselective production of the both enantiomeric product in a palladium-catalyzed asymmetric hydrosilylation reaction of styrene (R-product 94% ee in n-octane and S-product 90% ee in cyclooctane).
