Some scientific research about 97739-46-3

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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: 97739-46-3, is researched, Molecular C16H21O3P, about Synthesis of β2,2-Amino esters via Rh-Catalysed Regioselective Hydroaminomethylation, the main research direction is amine allyl ester carbon monoxide rhodium catalyst tandem hydroaminomethylation; amino ester preparation regioselective.Category: tetrahydropyran.

The synthesis of β2,2-amino esters was successfully achieved via Rh-catalyzed regioselective hydroaminomethylation of Me methacrylate with secondary amines using the neutral precursor Rh(acac)(CO)2. In this process, the presence of mol. sieves was crucial in order to access the final amino ester. For the synthesis of products containing aniline derivatives, the use of the cationic precursor [Rh(COD)2]BF4 and MeCgPPh phosphine I as ligand was necessary in a mixture of toluene/DCE as solvent. Effects of the steric and electronic properties of the amines were observed Interestingly, the poisoning effect of CO in the hydrogenation of the imine intermediate was observed when benzyl amine was used.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

A new synthetic route of 97739-46-3

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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: 97739-46-3, is researched, Molecular C16H21O3P, about Phenylphosphatrioxa-adamantanes: bulky, robust, electron-poor ligands that give very efficient rhodium(I) hydroformylation catalysts, the main research direction is phenylphosphatrioxaadamantane cage phosphine preparation reaction transition metal chloride; transition metal phenylphosphatrioxaadamantane cage phosphine complex preparation hydroformylation catalyst; alkene hydroformylation catalyst rhodium phenylphosphatrioxaadamantanes cage complex; crystal structure phenylphosphatrioxaadamantanes cage complex palladium iridium cobalt; mol structure phenylphosphatrioxaadamantanes cage complex palladium iridium cobalt.Safety of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane.

The cage phosphines 1,3,5,7-tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane (1a) and 1,3,5,7-tetraethyl-6-phenyl-2,4,8,trioxa-6-phosphaadamantane (1b) were made by the acid catalyzed addition of PhPH2 to the appropriate β-diketones; the acid used (HCl, H3PO4 or H2SO4) and its concentration affect the rate and selectivity of these condensation reactions. Phosphines 1a and 1b react with [PdCl2(NCPh)2] to form trans-[PdCl2(1a)2] (2a) and trans-[PdCl2(1b)2] (2b) as mixtures of rac and meso diastereoisomers. The Pt(II) chem. is more complicated and when 1a or 1b is added to [PtCl2(cod)], equilibrium mixtures of trans-[PtCl2L2] and [Pt2Cl4L2] (L = 1a or 1b) are formed in CH2Cl2 solution Meso/rac mixtures of trans-[MCl(CO)(1a)2] M = Ir (6a) or Rh (7a) are formed upon treatment of MCl3·nH2O with an excess of 1a and the anionic Co complex [NHEt3][CoCl3(1a)] (9) was isolated from the product formed by CoCl2·6H2O and 1a. The νCO values from the IR spectra of 6a and 7a suggest that 1a resembles a phosphonite in its bonding to Rh and Ir. Crystal structures of meso-2a, meso-2b, rac-6a and 9 are reported and in each case a small intracage C-P-C angle of ∼94° is observed and this may partly explain the bonding characteristics of ligands 1a and 1b. The cone angles for 1a and 1b are similar and large (∼200°). Rh complexes of ligands 1a and 1b are hydroformylation catalysts with similarly high activity to catalysts derived from phosphites. The catalysts derived from 1a and 1b gave unusually low linear selectivity in the hydroformylation of hexenes. This feature was further exploited in quaternary-selective hydroformylations of unsaturated esters; catalysts derived from 1a give better yields and regioselectivities than any previously reported catalyst.

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

A new application about 97739-46-3

There are many compounds similar to this compound(97739-46-3)Formula: C16H21O3P. 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.

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane( cas:97739-46-3 ) is researched.Formula: C16H21O3P.Sperger, Theresa; Le, Christine M.; Lautens, Mark; Schoenebeck, Franziska published the article 《Mechanistic insights on the Pd-catalyzed addition of C-X bonds across alkynes – a combined experimental and computational study》 about this compound( cas:97739-46-3 ) in Chemical Science. Keywords: benzyl chlorophenyl benzamide preparation oxidation addition mechanism substituent effect. Let’s learn more about this compound (cas:97739-46-3).

The Pd-catalyzed intramol. addition of carbamoyl chlorides and aryl halides across alkynes is investigated by means of DFT calculations and mechanistic test experiments The data suggest a mechanistic pathway that involves oxidative addition, alkyne insertion, cis → trans isomerization and reductive elimination. Our data indicate that oxidative addition is the reactivity limiting step in the addition of aryl chlorides and bromides across alkynes. However, for the corresponding addition of carbamoyl chlorides, alkyne insertion is found to be limiting. Full energetic reaction pathways for the intramol. additions across alkynes are presented herein and the role of ligands, alkyne substituents and tether moieties are discussed. Notably, the calculations could rationalize a pronounced effect of the alkyne substituent, which accounts for the exceptional reactivity of TIPS-substituted alkynes. In particular, the bulky silyl moiety is shown to significantly destabilize the formed Pd(II)-intermediates, thus facilitating both cis → trans isomerization and reductive elimination, which overall results in a flatter energetic landscape and a therefore increased catalytic efficiency.

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

The influence of catalyst in reaction 97739-46-3

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Effect of isotopic composition on electrical resistance of lithium》. Authors are Leffler, R. G.; Montgomery, D. J..The article about the compound:1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantanecas:97739-46-3,SMILESS:CC1(C2)OC(C3)(C)OC2(C)OC3(C)P1C4=CC=CC=C4).Related Products of 97739-46-3. Through the article, more information about this compound (cas:97739-46-3) is conveyed.

The elec. resistance of solid metallic Li containing varying proportions of Li6 and Li7 was measured at 4.2-295°K. For the isotopically pure substances, the main features of the behavior agree with the predictions of the Bloch-Grueneisen law, the characteristic temperature is inversely proportional to the square root of the mass. For the isotopically impure substances, the behavior of the resistance as a function of temperature can be described just as that of an isotopically pure substance with a mass dependent on the isotopic composition In fact, the temperature dependence of resistance for all compositions, including the pure isotopes, can be represented as a universal curve by use of appropriate scaling factors depending on average isotopic mass. From the present data the arithmetic mean cannot be preferred over the harmonic mean isotopic mass, and hence one cannot decide between certain theoretical proposals concerned with the effect of isotopic impurities on lattice vibration spectra. No need exists to invoke a scattering mechanism that looks upon isotopes as introducing imperfections in the lattice; rather, their presence merely modifies the lattice vibration spectrum. The effect of the martensitic transition at low temperatures is barely, if at all, discernible.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Brief introduction of 97739-46-3

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Category: tetrahydropyran. 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: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, is researched, Molecular C16H21O3P, CAS is 97739-46-3, about Palladium-catalyzed borylation of aryl bromides and chlorides using phosphatrioxa-adamantane ligands.

Catalysts based on the combination of Pd(OAc)2 and the electron-deficient phosphatrioxa-adamantane ligands are described for borylation of aryl bromides and chlorides. Catalytic evaluation of a small library of phosphatrioxa-adamantane ligands provided some insights on the preferred ligand steric profile for borylation reactions. The corresponding aryl boronate esters were accessed under mild conditions (25-70°) and isolated in high yields (up to 96%).

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Final Thoughts on Chemistry for 97739-46-3

There are many compounds similar to this compound(97739-46-3)Quality Control of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane. 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.

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: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, is researched, Molecular C16H21O3P, CAS is 97739-46-3, about Cage Phosphinites: Ligands for Efficient Nickel-Catalyzed Hydrocyanation of 3-Pentenenitrile.Quality Control of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane.

The cage monophosphinites CgPOR {where CgP = 6-phospha-2,4,8-trioxa-adamantane and R = Ph (La); 2-C6H4CH3 (Lb); 2,4,6-C6H2Me3 (Lc); 2,4-C6H3tBu2 (Ld); CH3 (Le); CH2CF3 (Lf)} and diphosphinites CgPZPCg {where ZH2 = 2,2′-biphenol (Lg) or 1,2-benzenedimethanol (Lh)} were made from CgPBr and the corresponding alc. or phenol. The cage phosphinites are remarkably stable to H2O. All the ligands La-h were tested for Ni(0)-catalyzed hydrocyanation of 3-pentenenitrile in the presence of Lewis acids (ZnCl2, Ph2BOBPh2, or iBu2AlOAliBu2), and tentative structure-activity relations are suggested. The hydrocyanation activities obtained with catalysts derived from monophosphinite Lf (with iBu2AlOAliBu2) and diphosphinite Lh (with ZnCl2) are comparable with the com. catalyst based on P(OTol)3. Trans-[PtCl2(L)2] where L = La (1a), Le (1e), and Lf (1f) and the chelate cis-[PtCl2(Lh)] (1h) are reported. From the νCO values for trans-[RhCl(CO)(La-f)2] (2a-f), it is concluded that ligand Lf is the most phosphite-like of the monophosphinites. Treatment of [Ni(cod)2] (cod = 1,5-cyclooctadiene) with Lh leads to a mixture of products, one of which was characterized as the binuclear [Ni2(Lh)2(μ-cod)] (3h). The crystal structures of Lh, 1a, 1e, 1f, 1h·2CH2Cl2, and 3h·3C6H5CH3 are reported.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

The effect of reaction temperature change on equilibrium 97739-46-3

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Recommanded Product: 97739-46-3. 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: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, is researched, Molecular C16H21O3P, CAS is 97739-46-3, about Palladium-Catalyzed Carbonylative Cyclization of Terminal Alkynes and Anilines to 3-Substituted Maleimides. Author is Xu, Jian-Xing; Wu, Xiao-Feng.

Palladium-catalyzed carbonylative synthesis of 3-substituted maleimides were discussed. By annulation of simple anilines with terminal alkynes under carbon monoxide pressure, the desired 3-substituted maleimides were obtained in 50-85% yields. Addnl., with the addition of phosphine ligand, maleic acid isoimide were obtained from the same substrates as well. With the presence of K2S2O8, the obtained maleic acid isoimide were transformed to the corresponding maleimide.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Discovery of 97739-46-3

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Nuclear spin-spin relaxation》. Authors are Lipsicas, M.; Hartlang, A..The article about the compound:1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantanecas:97739-46-3,SMILESS:CC1(C2)OC(C3)(C)OC2(C)OC3(C)P1C4=CC=CC=C4).Reference of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane. Through the article, more information about this compound (cas:97739-46-3) is conveyed.

The nuclear spin-spin relaxation time, T2, in H at 77.5°K., on a gas sample of approx. 100 Amagats d., was more accurately determined equal to the spin-lattice relaxation time, T1, within ±4%, correcting a previous report (CA 56, 4271h).

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Discovery of 97739-46-3

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Safety of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, is researched, Molecular C16H21O3P, CAS is 97739-46-3, about Palladium-catalyzed aminocarbonylation of aryl iodides using aqueous ammonia. Author is Xu, Tongyu; Alper, Howard.

Aminocarbonylation of aromatic iodides using aqueous ammonia in toluene has been developed. Various primary aromatic amides have been efficiently synthesized in good to excellent yields in the presence of catalytic quantities of Pd(OAc)2/CYTOP292. The usage of aqueous ammonia avoids the handling of two gases in the reaction.

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

Machine Learning in Chemistry about 97739-46-3

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Highly ligand-controlled regioselective Pd-catalyzed aminocarbonylation of styrenes with aminophenols, published in 2016-05-25, which mentions a compound: 97739-46-3, Name is 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, Molecular C16H21O3P, Product Details of 97739-46-3.

Achieving chemo- and regioselectivity simultaneously is challenging in organic synthesis. Transition metal-catalyzed reactions are effective in addressing this problem by the diverse ligand effect on the catalyst center. Ligand-controlled regioselective Pd-catalyzed carbonylation of styrenes with aminophenols was realized, chemoselectively affording amides. Using a combination of boronic acid and 5-chlorosalicylic acid as the additives, linear amides were obtained in high yields and selectivity using tris(4-methoxyphenyl)phosphine in acetonitrile, while branched amides were obtained in high yields and selectivity in butanone by changing the ligand to 1,3,5,7-tetramethyl-2,4,8-trioxa-6-phenyl-6-phosphaadamantane. Further studies show that the nature of the ligand is key to the regioselectivity. Cone angle and Tolman electronic parameter (TEP) have been correlated to the reactivity and regioselectivity. Studies on the acid additives show that different acids act as the proton source and the corresponding counterion can help enhance the reactivity and selectivity.

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