Category: 861909-53-7

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: 861909-53-7, is researched, Molecular C36H29O4P, about Asymmetric Synthesis of Hydroxy Esters with Multiple Stereocenters via a Chiral Phosphoric Acid Catalyzed Kinetic Resolution, the main research direction is asym synthesis hydroxy ester multiple stereocenters kinetic resolution.Related Products of 861909-53-7.

The kinetic resolution of hydroxy tert-Bu esters through a Bronsted acid catalyzed lactonization is described. The resulting enantioenriched mols. have cyclic backbones and/or multiple stereocenters. DFT calculations explore how small changes in substrate structure can have a large impact on the selectivity of the process.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 861909-53-7, is researched, SMILESS is OP1(OC2=C(C3=CC(C)=CC(C)=C3)C=C4C=CC=CC4=C2C5=C6C=CC=CC6=CC(C7=CC(C)=CC(C)=C7)=C5O1)=O, Molecular C36H29O4PJournal, Article, Research Support, Non-U.S. Gov’t, Angewandte Chemie, International Edition called Gold-catalyzed [3+2]-annulations of α-aryl diazoketones with the tetrasubstituted alkenes of cyclopentadienes: High stereoselectivity and enantioselectivity, Author is Chen, Ching-Nung; Cheng, Wei-Min; Wang, Jian-Kai; Chao, Tzu-Hsuan; Cheng, Mu-Jeng; Liu, Rai-Shung, the main research direction is dihydrofuran bicyclic regioselective enantioselective diastereoselective synthesis solvent effect; aryl diazoketone stereoselective enantioselective annulation alkene cyclopentadiene gold catalyst; cyclization reaction mechanism chirality transition state DFT crystal structure; Cloke-Wilson rearrangement; [3+2]-annulations; gold catalysis; tetrasubstituted alkenes; α-diazo ketones.Computed Properties of C36H29O4P.

This work reports gold-catalyzed [3+2]-annulations of α-diazo ketones with highly substituted cyclopentadienes, affording bicyclic 2,3-dihydrofurans with high regio- and stereoselectivity. The reactions highlights the first success of tetrasubstituted alkenes to undergo [3+2]-annulations with α-diazo carbonyls. The enantioselective annulations are also achieved with high enantioselectivity using chiral forms of gold and phosphoric acid. Our mechanistic anal. supports that cyclopentadienes serve as nucleophiles to attack gold carbenes at the more substituted alkenes, yielding gold enolates that complex with chiral phosphoric acid to enhance the enantioselectivity.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

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.Wu, Zijun; Wang, Jian researched the compound: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide( cas:861909-53-7 ).Name: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide.They published the article 《Enantioselective Medium-Ring Lactone Synthesis through an NHC-Catalyzed Intramolecular Desymmetrization of Prochiral 1,3-Diols》 about this compound( cas:861909-53-7 ) in ACS Catalysis. Keywords: enantioselective cyclization intramol desymmetrization prochiral diol heterocyclic carbene catalyst; lactone preparation. We’ll tell you more about this compound (cas:861909-53-7).

A highly enantioselective intramol. annulation reaction of 1,3-diols catalyzed by a triazolium N-heterocyclic carbene (NHC) precatalyst is disclosed, affording the corresponding medium-sized lactones in moderate to good yields with high enantioselectivities. It is worth noting that this compatible catalytic system was successfully applied to assemble a broad range of chiral medium-sized lactones, including ones with eight-, nine-, ten-, eleven-, and twelve-membered rings.

There are many compounds similar to this compound(861909-53-7)Name: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide, is researched, Molecular C36H29O4P, CAS is 861909-53-7, about Direct Interconversion of BINOL and H8-BINOL-Based Chiral Bronsted Acids Using Single-Step Red/Ox Manipulations, the main research direction is chiral binol phosphoric acid hydrogen hydrogenation; octahydrogenated binol phosphoric acid preparation; DDQ octahydrogenated binol chiral phosphoric acid oxidation; binol phosphoric acid preparation.SDS of cas: 861909-53-7.

A direct single-step hydrogenation of BINOL-based chiral phosphoric acids, N-triflyl phosphoramides, and disulfonimides to the corresponding H8-BINOL Bronsted acids in excellent yields and chemoselectivities is described. In addition, the conditions for the single-step oxidation of H8-BINOL-based Bronsted acids into the corresponding BINOL-based acids have been identified and employed to accomplish these interconversions in 41-81% yield.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

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, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov’t, Research Support, U.S. Gov’t, Non-P.H.S., Journal of the American Chemical Society called Enantiodivergent Fluorination of Allylic Alcohols: Data Set Design Reveals Structural Interplay between Achiral Directing Group and Chiral Anion, Author is Neel, Andrew J.; Milo, Anat; Sigman, Matthew S.; Toste, F. Dean, which mentions a compound: 861909-53-7, SMILESS is OP1(OC2=C(C3=CC(C)=CC(C)=C3)C=C4C=CC=CC4=C2C5=C6C=CC=CC6=CC(C7=CC(C)=CC(C)=C7)=C5O1)=O, Molecular C36H29O4P, Application of 861909-53-7.

Enantioselectivity values represent relative rate measurements that are sensitive to the structural features of the substrates and catalysts interacting to produce them. Therefore, well-designed enantioselectivity data sets are information rich and can provide key insights regarding specific mol. interactions. However, if the mechanism for enantioselection varies throughout a data set, these values cannot be easily compared. This premise, which is the crux of free energy relationships, exposes a challenging issue of identifying mechanistic breaks within multivariate correlations. Herein, we describe an approach to addressing this problem in the context of a chiral phosphoric acid catalyzed fluorination of allylic alcs. using aryl boronic acids as transient directing groups. By designing a data set in which both the phosphoric and boronic acid structures were systematically varied, key enantioselectivity outliers were identified and analyzed. A mechanistic study was executed to reveal the structural origins of these outliers, which was consistent with the presence of several mechanistic regimes within the data set. While 2- and 4-substituted aryl boronic acids favored the (R)-enantiomer with most of the studied catalysts, meta-alkoxy substituted aryl boronic acids resulted in the (S)-enantiomer when used in combination with certain (R)-phosphoric acids. We propose that this selectivity reversal is the result of a lone pair-π interaction between the substrate ligated boronic acid and the phosphate. On the basis of this proposal, a catalyst system was identified, capable of producing either enantiomer in high enantioselectivity (77% (R)-2 to 92% (S)-2) using the same chiral catalyst by subtly changing the structure of the achiral boronic acid.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of C36H29O4P. 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: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide, is researched, Molecular C36H29O4P, CAS is 861909-53-7, about Site-Selective Acylation of Natural Products with BINOL-Derived Phosphoric Acids. Author is Li, Junqi; Grosslight, Samantha; Miller, Scott J.; Sigman, Matthew S.; Toste, F. Dean.

The site-selective acylation of a steroidal natural product 19-hydroxydehydroepiandrosterone catalyzed by 1,1′-Bi(2-naphthol)-derived (BINOL) chiral phosphoric acids (CPAs) is described. Systematic variation and multivariate linear regression anal. reveal that the same steric parameters typically needed for high enantioselectivity with this class of CPAs are also required for site-selectivity in this case. D. functional theory calculations identify addnl. weak CH-π interactions as contributors to site discrimination. We further report a rare example of site-selective acylation of phenols through the evaluation of naringenin, a flavonoid natural product, using CPA catalysis. These results suggest that BINOL-derived CPAs may have broader applications in site-selective catalysis.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

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 Palladium(0)-catalyzed asymmetric C(sp3)-H arylation using a chiral binol-derived phosphate and an achiral ligand, published in 2017, which mentions a compound: 861909-53-7, mainly applied to alkyl haloarylcarbamate palladium chiral phosphoric acid catalyst arylation; indoline enantioselective preparation, Recommanded Product: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide.

The first efficient palladium(0)-catalyzed enantioselective C(sp3)-H activation reaction using a catalytic chiral base and an achiral phosphine ligand was reported. Fine-tuning the binol-derived phosphoric acid pre-catalyst and the reaction conditions was found to be crucial to achieve high levels of enantioselectivity for a variety of indoline products containing both tri- and tetrasubstituted stereocenters.

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Reference:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics