Category: 221012-82-4

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: (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine, is researched, Molecular C38H34N2O4P2, CAS is 221012-82-4, about Air-stable Ir-(P-Phos) complex for highly enantioselective hydrogenation of quinolines and their immobilization in poly(ethylene glycol) dimethyl ether (DMPEG).Reference of (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine.

An air-stable catalyst system Ir-(P-Phos) catalyst was found to be highly effective in the asym. hydrogenation of quinoline derivatives The catalyst immobilized in DMPEG was efficiently recovered and reused eight times, retaining reactivity and enantioselectivity.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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.Grasa, Gabriela A.; Zanotti-Gerosa, Antonio; Medlock, Jonathan A.; Hems, William P. researched the compound: (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine( cas:221012-82-4 ).Application In Synthesis of (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine.They published the article 《Asymmetric hydrogenation of isobutyrophenone Using a [(diphosphine)RuCl2(1,4-diamine)] catalyst》 about this compound( cas:221012-82-4 ) in Organic Letters. Keywords: ruthenium diphosphine diamine complex preparation hydrogenation catalyst; crystal structure ruthenium diphosphine diamine complex; ketone hydrogenation ruthenium diphosphine diamine complex catalyst. We’ll tell you more about this compound (cas:221012-82-4).

The use of three chiral 1,4-diamines in the [(diphosphine)RuCl2(diamine)] catalyst system is demonstrated in the hydrogenation of acetophenone. The use of a 1,4-diamine offers unique properties that allow tuning of the catalyst system. These include the 1st example of the use of a racemic diamine in combination with a chiral phosphine, which gives 95% ee in the hydrogenation of isobutyrophenone.

Here is a brief introduction to this compound(221012-82-4)Application In Synthesis of (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine, if you want to know about other compounds related to this compound(221012-82-4), you can read my other articles.

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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 Kinetic Resolution of 2-Substituted 2,3-Dihydro-4-pyridones by Palladium-Catalyzed Asymmetric Allylic Alkylation: Catalytic Asymmetric Total Synthesis of Indolizidine (-)-209I, published in 2014-04-04, which mentions a compound: 221012-82-4, Name is (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine, Molecular C38H34N2O4P2, Electric Literature of C38H34N2O4P2.

The kinetic resolution of 2-substituted-2,3-dihydro-4-pyridones was realized via a Pd-catalyzed allylic substitution reaction using a com. available (S)-P-Phos as a ligand, affording optically active dihydropyridones and C-allylated dihydropyridones in high yields and good enantioselectivities with the S-factor up to 43. With this protocol, a catalytic asym. total synthesis of indolizidine (-)-209I (I) was realized for the first time.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Fujimoto, Hayato; Kusano, Momoka; Kodama, Takuya; Tobisu, Mamoru published an article about the compound: (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine( cas:221012-82-4,SMILESS:COC(C=C1P(C2=CC=CC=C2)C3=CC=CC=C3)=NC(OC)=C1C4=C(OC)N=C(OC)C=C4P(C5=CC=CC=C5)C6=CC=CC=C6 ).Quality Control of (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine. 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:221012-82-4) through the article.

The Ni-catalyzed cyclization of bisphosphine derivatives to form various phosphacycles is reported. The reaction proceeds via the cleavage of two C-P bonds of the bisphosphine. Unlike the previously reported Pd catalysts, the use of Ni as a catalyst allows for the cyclization that requires C(alkyl)-P bond cleavage. A phospha-nickelacycle intermediate was successfully isolated and characterized by x-ray crystallog.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider