Category: 126613-06-7

Birkholz, Mandy-Nicole published the artcileEnantioselective hydrogenation with self-assembling rhodium phosphane catalysts: influence of ligand structure and solvent, Application In Synthesis of 126613-06-7, the publication is Chemistry – A European Journal (2007), 13(20), 5896-5907, database is CAplus and MEDLINE.

Three sets of new and related chiral phospholane and phosphepine ligands were prepared for Rh-catalyzed enantioselective hydrogenation. The size and substitution pattern of the cyclic monophosphines were varied. More importantly, the ligands differ in the nature of the heterocyclic group linked to the trivalent P atom: 2-pyridone or 2-alkoxypyridine. In the corresponding Rh complexes, the pyridone units of two monodentate P ligands can assemble by H bonding and form chelates. In contrast, synthetic precursors bearing alkoxypyridine appendages are not able to aggregate via intramol. H bonds. The nature of self-assembly is dependent on the nature of the P ligand and the solvent used for the hydrogenation (CH₂Cl₂ vs. MeOH). These features affect the rate of the reaction as well as the enantioselectivity, which varied at 0-99% ee. Complexation studies and DFT calculations were performed to explain these differences.

Chemistry – A European Journal published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Application In Synthesis of 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Gingras, Marc published the artcileSynthesis of carbohelicenes and derivatives by “carbenoid couplings”, Quality Control of 126613-06-7, the publication is Tetrahedron Letters (1999), 40(7), 1309-1312, database is CAplus.

Short synthetic sequences to helicenes have been achieved under thermal conditions, without using photochem. and high dilution Couplings of aromatic bis(bromomethyl) moieties, in the presence of an excess of LiHMDS, are key reactions in the final ring closures to helicenes. These optimized, quick and efficient reactions occur at 0°C within 10 min. and often provide [5]-helicene, [5]-helicene derivatives and [7]-helicene in ∼75% yield. Preliminary data questioned the formation of carbenoid anions and carbenes in the so called “carbenoid couplings”.

Tetrahedron Letters published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Quality Control of 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Gladiali, Serafino published the artcileNovel heterobidentate ligands for asymmetric catalysis: synthesis and rhodium-catalyzed reactions of S-alkyl (R)-2-diphenylphosphino-1,1′-binaphthyl-2′-thiol, SDS of cas: 126613-06-7, the publication is Tetrahedron: Asymmetry (1994), 5(7), 1143-6, database is CAplus.

Atropisomerically pure (R)-2-diphenylphosphino-1,1′-binaphthyl-2′-thiol (I) S-alkyl derivatives have been synthesized through a multistep reaction sequence starting from (R)-binaphthol. Pd(II) and Rh(I) complexes containing the I S-Me derivative as a chelate ligand have been prepared and characterized. Rh(I) complexes containing the I S-Me or the I S-iso-Pr derivative effectively catalyze the asym. hydroformylation of styrene and the hydrogen transfer reduction of acetophenone.

Tetrahedron: Asymmetry published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, SDS of cas: 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Grosheva, Daria published the artcileKetene Aminal Phosphates: Competent Substrates for Enantioselective Pd(0)-Catalyzed C-H Functionalizations, Computed Properties of 126613-06-7, the publication is ACS Catalysis (2017), 7(11), 7417-7420, database is CAplus.

Nonracemic siloxy- and alkoxybinaphthyl diphenylphospholanes such as I were prepared; in the presence of I, palladium(II) pivalate, pivalic acid, (diarylmethyl)oxodihydropyridinyl phosphates (ketene aminal phosphates) such as II underwent enantioselective C-H activation and cyclization mediated by Cs₂CO₃ in toluene to yield fused indolizinones such as phenylpyridoisoindolinone III in 59-91% yields and in 73:27-97:3 er. Diaryloxodihydropyridinyl phosphates underwent enantioselective cyclization to give mixtures of regioisomeric products in 88:12-98:2 er and 1.1:1-1.3:1 regioselectivities. The structures of I and of a (chlorophenyl)chloropyridoisoindolinone were determined by X-ray crystallog.

ACS Catalysis published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Computed Properties of 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Higham, Lee J. published the artcileP-chirogenic phosphines. MOP/diPAMP hybrids, their oxide crystal structures, reduction studies and alternative syntheses, SDS of cas: 126613-06-7, the publication is Journal of Organometallic Chemistry (2005), 690(1), 211-219, database is CAplus.

The novel P-chirogenic nonracemic (o-anisyl)phenyl MOP derivatives (1R,R_P)- and (1R,S_P)-2-[(o-anisyl)phenylphosphino]-2′-methoxy-1,1′-binaphthyls (10a,b) were prepared; their oxides were characterized by x-ray crystallog. Mono-phosphinylation of (R)-1,1′-binaphthyl-2,2′-bis(triflate) [(R)-1] gave diastereomeric mixture of (1R,R_P)- and (1R,S_P)-2-(ArPhPO)-2′-(OTf)-1,1′-binaphthyls (2a,b; Ar = 2-MeOC₆H₄) which were hydrolyzed and methylated; the resulting 2′-methoxy-2-phosphinoxides 8a,b were reduced to give corresponding diastereomeric 2-(ArPhP)-2′-methoxy-1,1′-binaphthyls (10a,b). Phosphines 10a,b were also prepared by coupling of (R)-2-methoxy-1,1′-binaphthyl-2-triflate with (2-MeOC₆H₄)PhPH, which avoids undesirable fragmentation and epimerization during reduction of the phosphinoxides 8a,b. A brief study of the coordination chem. of 10a with different rhodium precursors, relevant to the catalytic asym. addition of boronic acids to aldehydes is also reported.

Journal of Organometallic Chemistry published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, SDS of cas: 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sun, Xianfeng published the artcileMatching and mismatching effects of hybrid chiral biaxial bisphosphine ligands in enantioselective hydrogenation of ketoesters, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Chemistry – A European Journal (2009), 15(30), 7302-7305, S7302/1-S7302/10, database is CAplus and MEDLINE.

Three biaxial diphosphine ligands were synthesized. Their catalytic use in asym. hydrogenation of ketoesters to hydroxy esters were discussed. It was found that compound I together with [Ru(benzene)Cl₂]₂ was the best catalyst to promote the asym. hydrogenation of α-ketoesters to α-hydroxyesters.

Chemistry – A European Journal published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C9H10N2O, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Shi, Min published the artcileCatalytic, asymmetric aza-Baylis-Hillman reaction of N-sulfonated imines with 2-cyclohexen-1-one and 2-cyclopenten-1-one in the presence of a chiral phosphine Lewis base, Related Products of esters-buliding-blocks, the publication is Tetrahedron: Asymmetry (2005), 16(7), 1385-1391, database is CAplus.

In the aza-Baylis-Hillman reaction of N-sulfonated imines with 2-cyclohexen-1-one or 2-cyclopenten-1-one the Baylis-Hillman adducts can be obtained in good yields and moderate enantiomeric excess. by using (R)-2′-dimethylphosphanyl-[1,1′]binaphthalenyl-2-ol as a chiral phosphine Lewis base.,. The structure of this chiral phosphine Lewis base on chiral induction in this reaction has also been discussed.

Tetrahedron: Asymmetry published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C8H5F3O3, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kurz, Lilia published the artcileStereospecific functionalization of (R)-(-)-1,1′-bi-2-naphthol triflate, Quality Control of 126613-06-7, the publication is Tetrahedron Letters (1990), 31(44), 6321-4, database is CAplus.

Several examples of transition metal mediated functionalization of chiral 1,1′-bi-2-naphthol triflate are described which proceed with complete retention of substrate chirality. The transformations described demonstrate the potential of Pd(0) mediated reactions for the stereoselective transformation of the C-O bonds in this substrate.

Tetrahedron Letters published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Quality Control of 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Seidenkranz, Daniel T. published the artcileSingle-component, low molecular weight organic supergelators based on chiral barbiturate scaffolds, Name: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Supramolecular Chemistry (2019), 31(8), 499-507, database is CAplus.

We report here the first chiral barbiturate to act as a single-component LMOG capable of gelating a variety of chlorinated and aromatic solvents. Solution-based DOSY NMR experiments, solid-state VP-SEM, and X-ray crystallog. techniques were used to characterize chloroform-based gels at a variety of size domains. This scaffold provides a simple system to study the dynamics of gelation and self-assembly.

Supramolecular Chemistry published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C16H12O, Name: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Armanino, Nicolas published the artcileElectrophilic Trifluoromethylation of Primary Phosphines: Synthesis of a P-Bis(trifluoromethyl) Derivative of BINAP, Quality Control of 126613-06-7, the publication is Organometallics (2010), 29(7), 1771-1777, database is CAplus.

The new chiral diphosphine ligand (R)-(2′-(bis(trifluoromethyl)phosphino)-1,1′-binaphthyl-2-yl)diphenylphosphine (2, Ph₂PC₁₀H₆C₁₀H₆P(CF₃)₂), which contains a bis(trifluoromethyl)phosphine group, was prepared in five steps from (R)-BINOL (5). As a key transformation, the unprecedented electrophilic double trifluoromethylation of the primary phosphine H₂PC₁₀H₆C₁₀H₆OTf (8, OTf = triflate) was achieved using the hypervalent iodine trifluoromethylation reagent 1-trifluoromethyl-1,2-benziodoxol-3-(1H)-one (1), derived from o-iodobenzoic acid. The Pd dichloride complex of this ligand [PdCl₂(Ph₂PC₁₀H₆C₁₀H₆P(CF₃)₂)-κ²P,P] (10) shows the P(CF₃)₂ group with a high degree of pyramidalization at the P atom and a relatively short Pd-P bond (2.2230(4) Å), both features being indicative of the strong s-character of the P lone pair.

Organometallics published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Quality Control of 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics