Category: 119707-74-3

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called BINOL derivatives-catalysed enantioselective allylboration of isatins: application to the synthesis of (R)-chimonamidine, published in 2020, which mentions a compound: 119707-74-3, mainly applied to isatin allylboration enantioselective preparation BINOL catalyst; chimonamidine synthesis enantioselective allylboration, HPLC of Formula: 119707-74-3.

The asym. synthesis of the 3-allyl-3-hydroxyoxindole skeleton was accomplished in yields up to 99% via a metal-free and enantioselective allylation of isatins (90-96% ee) using BINOL derivatives as catalysts and an optimized allylboronate. This methodol. was applied at a gram-scale to the synthesis of the natural product (R)-chimonamidine.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Category: bromides-buliding-blocks. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, is researched, Molecular C20H12Br2O2, CAS is 119707-74-3, about A Continuously Regenerable Chiral Ammonia Borane for Asymmetric Transfer Hydrogenations. Author is Zhou, Qiwen; Meng, Wei; Yang, Jing; Du, Haifeng.

A novel chiral ammonia borane was designed and developed through the dehydrogenation of ammonia borane with a chiral phosphoric acid, which was highly effective for the asym. transfer hydrogenation of imines and β-enamino esters to afford high levels of reactivities and enantioselectivities. Significantly, this chiral ammonia borane can be continuously regenerated during the transfer hydrogenation with the assistance of water and ammonia borane, which made it possible to obtain satisfactory results using only 0.1 mol % of the chiral phosphoric acid. Notably, the role of chiral phosphoric acid is to produce the chiral ammonia borane.

If you want to learn more about this compound((S)-3,3′-Dibromo-1,1′-bi-2-naphthol)Category: bromides-buliding-blocks, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(119707-74-3).

Reference:
Bromide – Wikipedia,
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Ardkhean, Ruchuta; Roth, Philippe M. C.; Maksymowicz, Rebecca M.; Curran, Alex; Peng, Qian; Paton, Robert S.; Fletcher, Stephen P. published an article about the compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol( cas:119707-74-3,SMILESS:OC1=C(Br)C=C2C=CC=CC2=C1C3=C4C=CC=CC4=CC(Br)=C3O ).Formula: C20H12Br2O2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:119707-74-3) through the article.

The stereochem. role of the phosphoramidite ligand in the asym. conjugate addition of alkylzirconium species to cyclic enones has been established through exptl. and computational studies. Systematic, synthetic variation of the modular ligand established that the configuration of the binaphthol backbone is responsible for absolute stereocontrol, whereas modulation of the amido substituents leads to dramatic variations in the level of asym. induction. Chiral amido substituents are not required for enantioselectivity, leading to the discovery of a new family of easily synthesized phosphoramidites based on achiral amines that deliver equal levels of selectivity to Feringa’s ligand. A linear correlation between the length of the aromatic amido groups and exptl. determined enantioselectivity was uncovered for this class of ligand, which, following an optimization, led to highly selective ligands (up to 94% ee) with naphthyl rather than Ph groups. An electronic effect of sterically similar aromatic substituents was investigated through NMR and DFT studies, showing that electron-rich aryl groups allow better Cu coordination. An interaction between the metal center and an aromatic group is responsible for this enhanced affinity and leads to a more tightly coordinated transition structure, leading to the major enantiomer. These studies illustrate the use of parametric quant. structure-selectivity relationships to generate mechanistic models for asym. induction and catalyst structures that may be further probed by experiment and computation. This integrated approach leads to the rational modification of chiral ligands to achieve enhanced levels of selectivity.

If you want to learn more about this compound((S)-3,3′-Dibromo-1,1′-bi-2-naphthol)Formula: C20H12Br2O2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(119707-74-3).

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Homochiral D4-symmetric metal-organic cages from stereogenic Ru(II) metalloligands for effective enantioseparation of atropisomeric molecules, published in 2016-01-04, which mentions a compound: 119707-74-3, mainly applied to ruthenium palladium phenanthroline derivative complex preparation CD spectra; chiral separation ruthenium palladium phenanthroline derivative complex; crystal structure ruthenium palladium phenanthroline derivative complex, HPLC of Formula: 119707-74-3.

Absolute chiral environments are rare in regular polyhedral and prismatic architectures, but are achievable from self-assembly of metal-organic cages/containers (MOCs), which endow the authors with a promising ability to imitate natural organization systems to accomplish stereochem. recognition, catalysis and separation Here the authors report a general assembly approach to homochiral MOCs with robust chem. viability suitable for various practical applications. A stepwise process for assembly of enantiopure ΔΔΔΔΔΔΔΔ- and ΛΛΛΛΛΛΛΛ-Pd6(RuL3)8 MOCs is accomplished by pre-resolution of the Δ/Λ-Ru-metalloligand precursors. The obtained Pd-Ru bimetallic MOCs feature in large D4-sym. chiral space imposed by the predetermined Ru(II)-octahedral stereoconfigurations, which are substitutionally inert, stable, water-soluble and are capable of encapsulating a dozen guests per cage. Chiral resolution tests reveal diverse host-guest stereoselectivity towards different chiral mols., which demonstrate enantioseparation ability for atropisomeric compounds with C2 symmetry. NMR studies indicate a distinctive resolution process depending on guest exchange dynamics, which is differentiable between host-guest diastereomers.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary