Category: 138984-26-6

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 Formation of Macrocycles by Catalytic Intramolecular Aromatic Cycloaddition of Metal Carbenes to Remote Arenes, published in 1996-08-21, which mentions a compound: 138984-26-6, mainly applied to macrocyclic compound preparation; intramol aromatic cycloaddition metal carbene arene; macrocyclization diazoacetate phenylalkoxyalkyl rhodium, Safety of Dirhodium(II) tetrakis(caprolactam).

Diazoacetates derived from diols underwent dirhodium(II) carboxylate-catalyzed intramol. cycloaddition to form macrocyclic lactones or ketones in moderate to high isolated yields. For example, the cycloaddition of diazoacetic acid [2-[(phenylmethoxy)methyl]phenyl]methyl ester (I) gave the macrocyclic compound II and homologs thereof, such as III. Addition to the remote benzyl group occurred mainly at the 1,2-position to form disubstituted cycloheptatrienes in a bicyclo[8.5.0]-framework, but with p-methoxybenzyl derivatives addition was mainly at the 3,4-position to form a bicyclo[8.3.2]-framework. Dirhodium(II) perfluorobutyrate was the preferred catalyst for these transformations that were remarkably free of competing intramol. reactions; however, intramol. cyclopropanation of the allylic double bond was the exclusive outcome in dirhodium(II) caprolactamate-catalyzed reactions of cis-4-benzyloxy-2-buten-1-yl diazoacetate.

There is still a lot of research devoted to this compound(SMILES：C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2)Safety of Dirhodium(II) tetrakis(caprolactam), and with the development of science, more effects of this compound(138984-26-6) can be discovered.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
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Safety of Dirhodium(II) tetrakis(caprolactam). 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: Dirhodium(II) tetrakis(caprolactam), is researched, Molecular C24H40N4O4Rh2, CAS is 138984-26-6, about Optimal TBHP Allylic Oxidation of Δ5-Steroids Catalyzed by Dirhodium Caprolactamate. Author is Choi, Hojae; Doyle, Michael P..

Dirhodium tetracaprolactamate is the most efficient catalyst for the oxidation of Δ5-steroids to 7-keto-Δ5-steroids by 70% tert-Bu hydroperoxide in water (T-HYDRO). Isolated product yields range from 38 to 87%.

There is still a lot of research devoted to this compound(SMILES：C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2)Safety of Dirhodium(II) tetrakis(caprolactam), and with the development of science, more effects of this compound(138984-26-6) can be discovered.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
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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: 138984-26-6, is researched, SMILESS is C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2, Molecular C24H40N4O4Rh2Journal, Journal of the American Chemical Society called Ligand effects on dirhodium(II) carbene reactivities. Highly effective switching between competitive carbenoid transformations, Author is Padwa, Albert; Austin, David J.; Price, Alan T.; Semones, Mark A.; Doyle, Michael P.; Protopopova, Marina N.; Winchester, William R.; Tran, Andrea, the main research direction is diazo carbonyl preparation reaction rhodium catalyst; chemoselectivity diazo carbonyl reaction rhodium catalyst; cyclopropanation diazo carbonyl rhodium catalyst; aromatic substitution diazo carbonyl rhodium catalyst; insertion diazo carbonyl rhodium catalyst; cycloaddition aromatic diazo carbonyl rhodium catalyst; ligand effect rhodium catalyst reaction diazo.Name: Dirhodium(II) tetrakis(caprolactam).

Carboxylate and carboxamide ligands of dirhodium(II) catalysts control chemoselectivity in competitive metal carbene transformations of diazo compounds For competitive intramol. cyclopropanation vs. intramol. aromatic substitution with 1-diazo-3-aryl-5-hexen-2-ones (e.g., CH2:CMeCH2CHPhCOCHN2), use of Rh2(OAc)4 results in the products (e.g., I and II) from both transformations in nearly equal amounts, but dirhodium(II) perfluorobutyrate [Rh2(pfb)4] provides only the aromatic substitution product while dirhodium(II) caprolactamate [Rh2(cap)4] gives only the cyclopropanation product. Similar results are obtained from dirhodium(II) catalysts in competitive intramol. cyclopropanation vs. tertiary C-H insertion, aromatic cycloaddition vs. C-H insertion, cyclopropanation vs. aromatic cycloaddition, and C-H insertion vs. aromatic substitution. The order of reactivity for metal carbenes generated from Rh2(pfb)4 is aromatic substitution > tertiary C-H insertion > cyclopropanation ∼ aromatic cycloaddition > secondary C-H insertion, and the rate differences between them are as much as 100-fold. For Rh2(cap)4 the order of reactivity is cyclopropanation > tertiary C-H insertion > secondary C-H insertion > aromatic cycloaddition with aromatic substitution not observed as a competing process for the diazo compounds examined Control of chemoselectivity through charge and/or frontier MO properties of the intermediate metal carbene has been evaluated. Competitive product formation from Rh2(cap)4-catalyzed reactions of N-tert-butyl-N-benzyldiazoacetamide is temperature dependent over a narrow 15-deg range. The effect of carbene substituents other than the ligated dirhodium(II) on chemoselectivity is described and discussed.

There is still a lot of research devoted to this compound(SMILES：C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2)Name: Dirhodium(II) tetrakis(caprolactam), and with the development of science, more effects of this compound(138984-26-6) can be discovered.

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Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of C24H40N4O4Rh2. 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: Dirhodium(II) tetrakis(caprolactam), is researched, Molecular C24H40N4O4Rh2, CAS is 138984-26-6, about Synthetic Studies toward the Tetrapetalones: Diastereoselective Construction of a Putative Intermediate. Author is Bai, Wen-Ju; Pettus, Thomas R. R..

A strategy toward tetrapetalones was explored including a site-selective ethylenation of the silyl enol ether A to afford a quaternary stereo-center that serves in a stereogenic capacity. Regio- and diastereoselective reactions were observed in conjunction with the oxidative formation of cation B, which included subsequent selective formation of either carbon-oxygen or carbon-carbon bonds at δ or ζ position on the seven membered ring. The fourth ring was formed using a Stetter reaction.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Name: Dirhodium(II) tetrakis(caprolactam). 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: Dirhodium(II) tetrakis(caprolactam), is researched, Molecular C24H40N4O4Rh2, CAS is 138984-26-6, about Rhodium(II)-catalyzed intramolecular dipolar cycloaddition reactions of carbonyl ylides. Computational and empirical studies of the regio- and chemoselective effect of the catalyst ligand. Author is Padwa, Albert; Austin, David J.; Hornbuckle, Susan F.; Price, Alan T..

Ligand substitution in the rhodium(II)-catalyzed decomposition of α-diazo ketones containing tethered alkenes results in differing product ratios for intramol. dipolar cycloaddition and cyclopropanation.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of C24H40N4O4Rh2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Dirhodium(II) tetrakis(caprolactam), is researched, Molecular C24H40N4O4Rh2, CAS is 138984-26-6, about A new catalytic transformation of diazo esters: hydride abstraction in dirhodium(II)-catalyzed reactions. Author is Doyle, Michael P.; Dyatkin, Alexey B.; Autry, Christopher L..

Secondary benzylic and allylic diazoacetates undergo dirhodium(II)-catalyzed diazo decomposition to form, competitively or exclusively, ketone and vinylidene products from intramol. hydride abstraction in catalyst ligand-dependent molar ratios.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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, Synlett called Dirhodium caprolactamate catalyzed alkoxyalkylation of terminal alkynes, Author is Tusun, Xiarepati; Lu, Chong-Dao, which mentions a compound: 138984-26-6, SMILESS is C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2, Molecular C24H40N4O4Rh2, Application In Synthesis of Dirhodium(II) tetrakis(caprolactam).

Dirhodium caprolactamate [Rh2(cap)4] effectively catalyzes alkoxyalkylation of terminal alkynes in the presence of tert-Bu hydroperoxide (TBHP) under mild conditions. Thus, a variety of 2-vinyl ethers were synthesized via direct addition of ethers to terminal alkynes under mild reaction conditions.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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.Doyle, M. P.; Forbes, D. C.; Xavier, K. R. researched the compound: Dirhodium(II) tetrakis(caprolactam)( cas:138984-26-6 ).COA of Formula: C24H40N4O4Rh2.They published the article 《Dirhodium(II)-catalyzed carbonyl ylide generation. Stereoelectronic control in dioxolane formation》 about this compound( cas:138984-26-6 ) in Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). Keywords: diazoacetate cyclization benzaldehyde derivative copper rhodium; carbonyl ylide intermediate diazoacetate cyclization benzaldehydes; stereoelectronic control diazoacetate cyclization benzaldehydes; dioxolane preparation diazoacetate cyclization benzaldehyde derivative. We’ll tell you more about this compound (cas:138984-26-6).

The combination of Et diazoacetate with aryl aldehydes in the presence of copper(I) or rhodium(II) catalysts results in the formation of 1,3-dioxolane products in moderate to good yields. These reactions occur via ylide intermediates. Catalyst-dependent diastereocontrol is observed and suggests that metal-associated ylides are involved in the product-determining step. The influence of aryl aldehyde substituents has been determined

In some applications, this compound(138984-26-6)COA of Formula: C24H40N4O4Rh2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of C24H40N4O4Rh2. 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. Compound: Dirhodium(II) tetrakis(caprolactam), is researched, Molecular C24H40N4O4Rh2, CAS is 138984-26-6, about Synthesis of annulated pyridines as inhibitors of aldosterone synthase (CYP11B2).

A series of cyclopenta[c]pyridine aldosterone synthase (AS) inhibitors were conveniently accessed using batch or continuous flow Kondrat’eva reactions. Preparation of the analogous cyclohexa[c]pyridines, e. g., I, led to the identification of a potent and more selective AS inhibitor. The structure-activity-relationship (SAR) in this new series was rationalized using binding mode models in the crystal structure of AS.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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: 138984-26-6, is researched, Molecular C24H40N4O4Rh2, about Dirhodium(II) caprolactamate: An exceptional catalyst for allylic oxidation, the main research direction is cycloalkene allylic oxidation rhodium; cycloalkenone preparation; rhodium allylic oxidation catalyst.Recommanded Product: 138984-26-6.

The oxidation of organic mols. represents a fundamentally important chem. process. Particularly important is allylic oxidation, whereby a single methylene unit is converted directly into a carbonyl group. Dirhodium(II) caprolactamate, in combination with tert-Bu hydroperoxide, effectively catalyzed the allylic oxidation of a variety of olefins and enones. The reaction was completely selective, tolerant of air/moisture, and can be performed with very low catalyst loading in minutes. A mechanistic proposal involving redox chain catalysis has been put forth, as well as evidence for the intermediacy of a higher valent dirhodium tert-Bu peroxy complex.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
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