Tag: M.W=500-600

Computed Properties of C36H30NO2P. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Efficient, Selective, and Green: Catalyst Tuning for Highly Enantioselective Reactions of Ethylene. Author is Smith, Craig R.; RajanBabu, T. V..

Fine tuning of the biaryl and amino moieties of Feringa’s phosphoramidite ligands yields structurally simpler, yet more efficient and selective, ligands, e.g. I, for asym. hydrovinylation of vinyl arenes and acyclic 1,3-dienes. The enantioselectivities and yields observed in the formation of the 3-arylbutenes are among the highest for all asym. catalytic processes reported to date for the synthesis of intermediates for the widely used antiinflammatory 2-arylpropionic acids including naproxen, ibuprofen, fenoprofen, and flurbiprofen.

Here is just a brief introduction to this compound(415918-91-1)Computed Properties of C36H30NO2P, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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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: 415918-91-1, is researched, SMILESS is C[C@@H](N(P1OC2=CC=C3C=CC=CC3=C2C4=C5C=CC=CC5=CC=C4O1)[C@@H](C6=CC=CC=C6)C)C7=CC=CC=C7, Molecular C36H30NO2PJournal, Article, Research Support, Non-U.S. Gov’t, Angewandte Chemie, International Edition called Synthesis of allylic amines: Enantioselective allylation of aromatic amines after in situ generation of an activated cyclometalated iridium catalyst, Author is Shu, Chutian; Leitner, Andreas; Hartwig, John F., the main research direction is regioselective enantioselective allylation aromatic amine cyclometalated iridium phosphoramidite catalyst.Category: esters-buliding-blocks.

Highly regio- and enantioselective allylation of aromatic amines is observed when a cyclometalated Ir-phosphoramidite complex is generated in situ. The active catalyst can be formed from [{Ir(cod)Cl}2] and ligand L with a volatile alkylamine prior to addition of the reagents or upon use of a tertiary amine additive. E.g., a cyclometalated Ir-phosphoramidite complex catalyzed the allylation of PhNH2 by carbonate (E)-PhCH:CHCH2OC(O)OMe to give 80% (+)-PhCH(NHPh)CH:CH2.

Here is just a brief introduction to this compound(415918-91-1)Category: esters-buliding-blocks, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Enantioselective and diastereodivergent access to α-substituted α-amino acids via dual iridium copper catalysis.Name: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine.

The work reported within this paper describes an example of the application of bimetallic catalysts system in allylic substitution reactions. The development of new nucleophiles and the control of enantio- and diastereoselectivity are the main research topics in this area. An improvement in the reactivity and diastereoselectivity has been realized for the dual Ir/Cu catalyzed allylic alkylation of inactive prochiral nucleophiles, under mild reaction conditions. Furthermore, the choice of the metallacyclic iridium complex and chiral Cu-Phox complex combination allows for access to all four stereoisomers from the same starting materials with excellent enantioselectivity and diastereoselectivity (up to >99% ee and >20:1 dr). Significantly, this method provides a stereodivergent access to 2-amino-3-methylpent-4-acid ester, an important fragment for the synthesis of Halipeptin A.

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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 Non-stabilized nucleophiles in Cu-catalysed dynamic kinetic asymmetric allylic alkylation, published in 2015-01-15, which mentions a compound: 415918-91-1, mainly applied to copper catalyzed dynamic kinetic asym transformation racemic substrate; unstabilized nucleophile dynamic kinetic asym allylic alkylation mechanism; organometallic reagent preparation dynamic kinetic asym allylic alkylation; medicinal tuberculosis leprosy preparation; aminobenzoate biosynthesis inhibitor preparation, Reference of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine.

The development of new reactions forming asym. carbon-carbon bonds has enabled chemists to synthesize a broad range of important carbon-containing mols., including pharmaceutical agents, fragrances and polymers. Most strategies to obtain enantiomerically enriched mols. rely on either generating new stereogenic centers from prochiral substrates or resolving racemic mixtures of enantiomers. An alternative strategy-dynamic kinetic asym. transformation-involves the transformation of a racemic starting material into a single enantiomer product, with greater than 50 per cent maximum yield. The use of stabilized nucleophiles (pKa < 25, where Ka is the acid dissociation constant) in palladium-catalyzed asym. allylic alkylation reactions has proved to be extremely versatile in these processes. Conversely, the use of non-stabilized nucleophiles in such reactions is difficult and remains a key challenge. Here we report a copper-catalyzed dynamic kinetic asym. transformation using racemic substrates and alkyl nucleophiles. These nucleophiles have a pKa of ≥50, more than 25 orders of magnitude more basic than the nucleophiles that are typically used in such transformations. Organometallic reagents are generated in situ from alkenes by hydrometallation and give highly enantioenriched products under mild reaction conditions. The method is used to synthesize natural products that possess activity against tuberculosis and leprosy, and an inhibitor of para-aminobenzoate biosynthesis. Mechanistic studies indicate that the reaction proceeds through a rapidly isomerizing intermediate. We anticipate that this approach will be a valuable complement to existing asym. catalytic methods. Here is just a brief introduction to this compound(415918-91-1)Reference of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Formula: C36H30NO2P. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Unprecedented catalytic enantioselective trapping of arene oxides with dialkylzinc reagents. Author is Bertozzi, Fabio; Crotti, Paolo; Del Moro, Federica; Feringa, Ben L.; Macchia, Franco; Pineschi, Mauro.

The first catalytic enantioselective trapping of sym. and racemic arene oxides with organometallic reagents is reported. Benzene oxide (7-oxabicyclo[4.1.0]hepta-2,4-diene) is in equilibrium with oxepin. Catalyst system included copper ditriflate and (11bR)-N,N-bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine. Thus, the reaction of 7-oxabicyclo[4.1.0]hepta-2,4-diene with dimethylzinc gave (1S,6S)-6-methyl-2,4-cyclohexadien-1-ol in 93% enantiomeric excess and 4-methyl-2,5-cyclohexadien-1-ol. Reactions of 2,3-dihydro-3a,7a-epoxy-1H-indene and 1a,7b-dihydronaphth[1,2-b]oxirene were also investigated.

Here is just a brief introduction to this compound(415918-91-1)Formula: C36H30NO2P, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine(SMILESS: C[C@@H](N(P1OC2=CC=C3C=CC=CC3=C2C4=C5C=CC=CC5=CC=C4O1)[C@@H](C6=CC=CC=C6)C)C7=CC=CC=C7,cas:415918-91-1) is researched.Synthetic Route of C17H19N3O2S. The article 《Stereodivergent Synthesis of Enantioenriched γ-Butyrolactones Bearing Two Vicinal Stereocenters Enabled by Synergistic Copper and Iridium Catalysis》 in relation to this compound, is published in Angewandte Chemie, International Edition. Let’s take a look at the latest research on this compound (cas:415918-91-1).

By virtue of a fundamentally new reaction model of azomethine ylide serving as a two-atom synthon, the first example of stereodivergent preparation of [(3R,4S)/(3S,4R)/(3R,4R)/(3S,4S)]-γ-butyrolactones I (R = Me, benzyl, allyl, 2-ethoxycarbonylethyl, etc.) via synergistic Cu/Ir-catalyzed asym. cascade allylation/lactonization is presented, and all four stereoisomers of I bearing two vicinal stereocenters are accessible with excellent diastereoselective and enantioselective control. The chiral IrIII- π-allyl intermediate was separated and characterized to understand the origin of the regio- and stereoselectivity of the initial C-C bond formation process. Control experiments shed some light on the catalyst/substrate and catalyst/catalyst interactions in this dual catalytic system to rationalize the related kinetic/dynamic kinetic resolution process with different catalyst combinations. The enantioenriched γ-butyrolactone products I were converted into an array of structurally complex chiral mols. and organocatalysts that were otherwise inaccessible.

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

Computed Properties of C36H30NO2P. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Rapid Access to Spirocyclic Oxindole Alkaloids: Application of the Asymmetric Palladium-Catalyzed [3 + 2] Trimethylenemethane Cycloaddition. Author is Trost, Barry M.; Bringley, Dustin A.; Zhang, Ting; Cramer, Nicolai.

The marcfortines are complex secondary metabolites that show potent anthelmintic activity and are characterized by the presence of a bicyclo[2.2.2]diazaoctane fused to a spirooxindole. Herein, we report the synthesis of two members of this family. The synthesis of marcfortine B, I (R = H), utilizes a carboxylative trimethylenemethane (TMM) cycloaddition to establish the spirocyclic core, followed by an intramol. Michael addition and oxidative radical cyclization to access the strained bicyclic ring system. In addition, the first asym. synthesis of (-)-marcfortine C, I (R = Me), is described. The key step involves a cyano-substituted TMM cycloaddition, which proceeds in nearly quant. yield with high diastereo- and enantioselectivity. The resulting chiral center was used to establish all remaining stereocenters in the natural product.

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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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Liu, Ze-Shui; Li, Wen-Ke; Kang, Tai-Ran; He, Long; Liu, Quan-Zhong published the article 《Palladium-Catalyzed Asymmetric Cycloadditions of Vinylcyclopropanes and in Situ Formed Unsaturated Imines: Construction of Structurally and Optically Enriched Spiroindolenines》. Keywords: indole aryl sulfonyl cyclopropane vinyl palladium asym cycloaddition catalyst; spiroindolenine stereoselective preparation.They researched the compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine( cas:415918-91-1 ).Quality Control of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine. 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:415918-91-1) here.

A palladium-catalyzed (3 + 2) cycloaddition of vinyl cyclopropane and α,β-unsaturated imines generated in situ from aryl sulfonyl indoles is reported. The reaction proceeds with high diastereoselectivity to provide the optically enriched spirocyclopentane-1,3′-indolenines, e.g., I, in up to 74% yield and with up to 97% ee, which contains an all-carbon quaternary center and two tertiary stereocenters. The reaction involves a first conjugate addition of the carbon anion of zwitterionic π-allylpalladium complex from vinyl cyclopropane to the in situ formed unsaturated imine followed by a palladium-catalyzed intramol. C3-allylation of indole.

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Recommanded Product: 415918-91-1. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Palladium-Catalysed Carboborylation for the Synthesis of Borylated Indanes. Author is Zieba, Andrzej; Hooper, Joel F..

A palladium-catalyzed carboborylation reaction for the synthesis of borylated indanes has been investigated. This reaction proceeds in good yields with an achiral catalyst, and is tolerant of substitution on the aryl ring, although sensitivity to the substitution of the alkene was observed Initial studies towards an enantioselective version of this reaction were undertaken, identifying phosphoramidites as a promising ligand class. This allowed for the synthesis of chiral indane and indolone products with moderate levels of enantioselectivity.

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