Category: 503538-69-0

Recommanded Product: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, is researched, Molecular C38H24F4O4P2, CAS is 503538-69-0, about SynPhos in asymmetric hydrogenation. Author is Bulliard, Michel.

A review. The account briefly reviews the asym. hydrogenation industry structure in pharmaceuticals and steps necessary for the introduction of a new technol. The application of two newly patented C2 atropisomeric ligands, SynPhos and Difluorphos, in asym. hydrogenation of diketones and hydroxyketones in comparison to other chiral ligands, such as BINAP, is discussed. SynPhos is shown to be flexible in its use, general enough to cover a wide range of processes and currently positioned in the market place as a standard ligand and for as many applications as possible.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Related Products of 503538-69-0. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, is researched, Molecular C38H24F4O4P2, CAS is 503538-69-0, about Au(I)-catalyzed enantioselective 1,3-dipolar cycloadditions of munchnones with electron-deficient alkenes. Author is Melhado, Asa D.; Luparia, Marco; Toste, F. Dean.

The catalytic enantioselective 1,3-dipolar cycloaddition of munchnone dipoles with electron-deficient alkenes is described. The reaction is catalyzed by chiral bis(phosphine)gold(I) benzoate complexes and provides Δ1-pyrrolines, e.g., I, with excellent regio-, diastereo-, and enantioselectivity. The reaction is proposed to proceed through a 1,3-dipole generated by deprotonation of a gold(I)-activated azlactone.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Lucciola, Daniela; Keay, Brian A. published the article 《Further developments of an enantioselective palladium-catalyzed polyene cyclization: surprising solvent and ligand effects》. Keywords: palladium catalysts polyene cyclization solvent ligand effect microwave.They researched the compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole( cas:503538-69-0 ).SDS of cas: 503538-69-0. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:503538-69-0) here.

The enantioselectivity of a Pd-catalyzed domino Heck-Mizoroki cyclization is dramatically enhanced by ligand and solvent choice. Electron-deficient ligands such as (R)-DIFLUORPHOS gave I in %ee values ranging from 94% ee to >99% ee. EtOH was found to be superior to other solvents traditionally used in Heck-Mizoroki reactions, generally showing increases in enantioselectivity when compared to toluene. It is also shown that microwave heating accelerates the reaction in either solvent and allows for a longer catalyst lifetime without eroding the %ee.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Cho, Chang-Woo; Krische, Michael J. researched the compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole( cas:503538-69-0 ).Computed Properties of C38H24F4O4P2.They published the article 《α-Hydroxy Esters via Enantioselective Hydrogen-Mediated C-C Coupling: Regiocontrolled Reactions of Silyl-Substituted 1,3-Diynes》 about this compound( cas:503538-69-0 ) in Organic Letters. Keywords: ester hydroxy preparation asym regioselective reductive coupling alkadiyne glyoxylate; coupling asym reductive alkadiyne oxo ester rhodium diphosphine catalyzed; enynoate hydroxy preparation asym regioselective coupling alkadiyne glyoxylate. We’ll tell you more about this compound (cas:503538-69-0).

Rhodium-catalyzed asym. reductive coupling of Et glyoxalate and 1,3-diynes in the presence of mol. hydrogen afforded α-hydroxy-β,γ-enynoates with high regio- and enantioselectivity. Reaction of R1CCCCR3 with OHCCOOR2 and H2 in the presence of Rh-(R)-Cl,MeO-BIPHEP [(1R)-5,5′-dichloro-6,6′-dimethoxy-1,1′-biphenyl-2,2′-bis(diphenylphosphine)] gave (2R)-R3CCCH:CR1CH(OH)COOR2 (1c, R1 = R3 = Ph, R2 = Et; 4c-9c, R1 = Me3Si, Me2tBuSi; R2 = Et; R3 = Ph, Me, cyclopropylmethyl, Me2tBuSiOCH2) with alkyne regioselectivity of >99% and ee values of 89-94%. Notably, for trialkylsilyl-substituted 1,3-diynes, C-C coupling occurs exclusively at the carbon atom bearing silyl group. π-Back-bonding from low valent rhodium as described by the Dewar-Chatt-Duncanson model appears to direct the regiochem. of C-C coupling, as corroborated by calculations of the diyne LUMO coefficients

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

HPLC of Formula: 503538-69-0. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, is researched, Molecular C38H24F4O4P2, CAS is 503538-69-0, about (R)-3,5-diCF3-SYNPHOS and (R)-p-CF3-SYNPHOS, Electron-Poor Diphosphines for Efficient Room Temperature Rh-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids. Author is Berhal, Farouk; Esseiva, Olivier; Martin, Charles-Henri; Tone, Hitoshi; Genet, Jean-Pierre; Ayad, Tahar; Ratovelomanana-Vidal, Virginie.

Two new atropisomeric electron-poor chiral diphosphine ligand analogs of SYNPHOS were prepared, and their electronic properties described. These two ligands afforded high performance for the Rh-catalyzed asym. 1,4-addition of arylboronic acids to α,β-unsaturated carbonyl compounds at room temperature

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole(SMILESS: FC1(F)OC2=CC=C(P(C3=CC=CC=C3)C4=CC=CC=C4)C(C5=C6OC(F)(F)OC6=CC=C5P(C7=CC=CC=C7)C8=CC=CC=C8)=C2O1,cas:503538-69-0) is researched.Synthetic Route of C8H8N2S. The article 《Kinetic Resolution of 2-Substituted 1, 2-Dihydroquinolines by Rhodium-Catalyzed Asymmetric Hydroarylation》 in relation to this compound, is published in Chinese Journal of Chemistry. Let’s take a look at the latest research on this compound (cas:503538-69-0).

A highly efficient kinetic resolution of racemic 2-substituted 1,2-dihydroquinolines I (R = H, Me, OMe, Cl; R1 = Me, Ph, Bn, 4-chlorophenyl; R2 = Me, Ph, 3,5-dimethylphenyl, etc.) via Rh-catalyzed asym. hydroarylation has been described for the first time. A variety of arylboronic acids ArB(OH)2 (Ar = Ph, 3-fluorophenyl, naphthalen-2-yl, etc.) coupled with 2-substituted 1,2-dihydroquinolines I under mild reaction condition. The transformations into the enantio-enriched 2,3-diaryl-tetrahydroquinolines II as well as the recovered chiral 2-aryl-dihydroquinolines III were obtained with high yields and excellent enantioselectivities (86%-99% ee, s factor up to 1057).

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Communications (Cambridge, United Kingdom) called Enantioselective aryl-aryl coupling facilitated by chiral binuclear gold complexes, Author is Himmelstrup, Jonas; Buendia, Mikkel B.; Sun, Xing-Wen; Kramer, Soeren, which mentions a compound: 503538-69-0, SMILESS is FC1(F)OC2=CC=C(P(C3=CC=CC=C3)C4=CC=CC=C4)C(C5=C6OC(F)(F)OC6=CC=C5P(C7=CC=CC=C7)C8=CC=CC=C8)=C2O1, Molecular C38H24F4O4P2, Recommanded Product: 503538-69-0.

Herein, we report stoichiometric investigations embodying the first highly enantioselective aryl-aryl coupling facilitated by a gold complex. With up to 91% ee, this is the first demonstration of a transmetalation and C(sp2)-C(sp2) reductive elimination sequence with high enantioselectivity using a gold complex. The results offer a basis for development of enantioselective gold-catalyzed aryl-aryl coupling reactions.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 503538-69-0, is researched, Molecular C38H24F4O4P2, about Synthesis of homoallylic alcohols via Lewis acid assisted enantioselective desymmetrization, the main research direction is butenediol carbonate arylboronate enantioselective allylic substitution rhodium catalyst; homoallylic alc asym synthesis.Formula: C38H24F4O4P2.

A highly enantioselective allylic substitution of (Z)-but-2-ene-1,4-diol derivatives was developed using a Rh(I) catalyst and arylboronates as nucleophiles. The reaction yields versatile homoallylic alcs. from readily available linear bis-carbonates.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Jeulin, Severine; Duprat de Paule, Sebastien; Ratovelomanana-Vidal, Virginie; Genet, Jean-Pierre; Champion, Nicolas; Dellis, Philippe published the article 《Difluorphos, an electron-poor diphosphane: A good match between electronic and steric features》. Keywords: benzodioxole diphosphinylbis preparation geometry acidity chiral ligand asym hydrogenation; ketone fluorinated asym hydrogenation; alc beta functionalized asym synthesis; rhodium complex diphosphine IR spectra; diphosphine atropisomeric dihedral angle; diselenide atropisomeric diphosphine NMR spectra.They researched the compound: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole( cas:503538-69-0 ).Synthetic Route of C38H24F4O4P2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:503538-69-0) here.

Both enantiomers of difluorphos I were synthesized and their stereoelectronic features were evaluated in theor. and exptl. studies. The unusual π acidity of I explains the excellent results obtained with it in ruthenium-mediated asym. hydrogenation of fluorinated β-functionalized ketones. These results are better than those obtained with other biphenyl-based diphosphines.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis of chiral exocyclic amines by asymmetric hydrogenation of aromatic quinolin-3-amines, published in 2014, which mentions a compound: 503538-69-0, Name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, Molecular C38H24F4O4P2, Synthetic Route of C38H24F4O4P2.

Asym. hydrogenation of aromatic quinolin-3-amines was successfully developed with up to 94 % enantiomeric excess (ee). Introduction of the phthaloyl moiety to the amino group is crucial to eliminate the inhibition effect caused by the substrate and product, to activate the aromatic ring, and to improve the diastereoselectivity. This new methodol. provides direct and facile access to chiral exocyclic amines. Notably, this report is the first on the highly enantioselective hydrogenation of aromatic amines. The structures and absolute configuration of the compounds were confirmed by the single crystal x-ray diffraction anal. of 4-methyl-N-((2S,3S)-2-phenyl-1,2,3,4-tetrahydroquinolin-3-yl)benzenesulfonamide and its crystallog. data were deposited at the Cambridge Crystallog. Data Center as supplementary publication number CCDC 962689.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem