Category: 34413-35-9

On August 31, 2014, Rana, Abhinandan; Kumar Jana, Swapan; Pal, Tanusri; Puschmann, Horst; Zangrando, Ennio; Dalai, Sudipta published an article.Name: 5,6,7,8-Tetrahydroquinoxaline The title of the article was Electrical conductivity and luminescence properties of two silver(I) coordination polymers with heterocyclic nitrogen ligands. And the article contained the following:

The synthesis and X-ray structural characterization of two novel silver(I) coordination polymers, [Ag(NO3)(quin)]n (1) and [Ag8(HL)2(H2O)4(mpyz)]·3H2O (2) are reported, where quin=5,6,7,8-tetrahydroquinoxaline, H6L=cyclohexane-1,2,3,4,5,6-hexacarboxylic acid and mpyz=2-Me pyrazine. The single crystal diffraction analyses showed that complex 1 is a 2D layered structure, while 2 presents a 3D polymeric architecture. In complex 2 the network is stabilized by argentophilic interactions and hydrogen bonding. Elec. conductivity of order 3 × 10-4 Scm-1 (1) and 1.6 × 10-4 Scm-1 (2) is measured on thin film specimen at room temperature The photoluminescence and thermal properties of the complexes have also been studied. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).Name: 5,6,7,8-Tetrahydroquinoxaline

The Article related to silver tetrahydroquinoxaline cyclohexanehexacarboxylate methylpyrazine polymer elec conductivity luminescence, crystal structure silver tetrahydroquinoxaline cyclohexanehexacarboxylate methylpyrazine polymer and other aspects.Name: 5,6,7,8-Tetrahydroquinoxaline

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

On February 6, 2008, Zhu, Guang; Pang, Keliang; Parkin, Gerard published an article.Safety of 5,6,7,8-Tetrahydroquinoxaline The title of the article was New modes for coordination of aromatic heterocyclic nitrogen compounds to molybdenum: catalytic hydrogenation of quinoline, isoquinoline, and quinoxaline by Mo(PMe3)4H4. And the article contained the following:

The heterocyclic nitrogen compounds (NHetH), isoquinoline (iQH), quinoxaline (QoxH) and quinazoline (QazH), react with Mo(PMe3)6 to give (η2-NHet)Mo(PMe3)4H as a result of cleavage of the C-H bond adjacent to the nitrogen atom. The C-H bond cleavage is reversible, the excess of PMe3 yields the starting compounds back. Furthermore, at elevated temperatures (η2-NHet)Mo(PMe3)4H converts sequentially to isomers of (η6-C,N-NHetH)Mo(PMe3)3 in which the ligand coordinates via the heterocycle, and further, by a haptotropic shift, to (η6-C6-NHetH)Mo(PMe3)3 with coordination via the carbocyclic ring. Isomers of (η6-C,N-NHetH)Mo(PMe3)3 in which the heterocyclic ring coordinated to molybdenum may be hydrogenated, yielding the 1,2,3,4-tetrahydro-derivatives Thus, (η6-C5N-iQH)Mo(PMe3)3 and (η6-C4N2-QoxH)Mo(PMe3)3 react with H2 at 90° to give Mo(PMe3)4H4 and release 1,2,3,4-tetrahydroisoquinoline and 1,2,3,4-tetrahydroquinoxaline, resp. Furthermore, Mo(PMe3)4H4 serves as a catalyst precursor for the hydrogenation of quinoline, isoquinoline, and quinoxaline to the corresponding 1,2,3,4-tetrahydro-heterocycles. The Mo(PMe3)4H4 is the first simple molybdenum complex to effect catalytic hydrogenation of these heterocyclic nitrogen compounds, a necessary step in hydrodenitrogenation. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).Safety of 5,6,7,8-Tetrahydroquinoxaline

The Article related to molybdenum trimethylphosphine isoquinoline quinoxaline quinazoline complex preparation haptotropic rearrangement, hydrogenation partial isoquinoline quinoxaline quinazoline molybdenum trimethylphosphine complex and other aspects.Safety of 5,6,7,8-Tetrahydroquinoxaline

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

On August 17, 2011, Trost, Barry M.; Thaisrivongs, David A.; Hartwig, Jan published an article.Electric Literature of 34413-35-9 The title of the article was Palladium-Catalyzed Asymmetric Allylic Alkylations of Polynitrogen-Containing Aromatic Heterocycles. And the article contained the following:

Nonracemic cyclohexenylmethyl- and cyclopentenylmethyl-substituted nitrogen heterocycles such as I are prepared in 44-93% yields and in 75->99% ee by enantioselective allylic alkylation reactions of cyclohexenyl and cyclopentenyl trimethylbenzoates with methyl-substituted nitrogen heterocycles such as 2-methylpyrazine in the presence of bis(allylpalladium chloride) and a nonracemic dibenzamidodibenzobicyclooctane ligand. Methylated nitrogen-containing aromatic heterocycles such as 2-methylpyrazine, 2-methylpyrimidine, 3-methyl-6-phenylpyridazine, 2-methylquinoxaline, and 1-benzyl-2-methylbenzimidazole are effective reactants. 5,6,7,8-Tetrahydroquinoxaline also undergoes enantioselective allylic alkylation with a cyclohexenyl trimethylbenzoate to give cyclohexenyl tetrahydroquinoxaline II in 99% yield, >99% ee, and in 81:19 diastereoselectivity. The mesityl ester, whose steric bulk prevents competitive deacylation of the electrophile from “hard” nucleophiles, is introduced as a new leaving group in allylic alkylation chem. In contrast to previous studies of enantioselective allylic alkylation reactions with pyridine-based substrates, no precomplexation with a Lewis acid is required before deprotonation of the nucleophiles with LiHMDS, underscoring the relative acidity of these electron-deficient nucleophiles. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).Electric Literature of 34413-35-9

The Article related to cyclohexenylmethyl nitrogen heterocycle enantioselective preparation, enantioselective allylic alkylation cyclohexenyl cyclopentenyl mesityl ester nitrogen heterocycle, trimethylbenzoate ester leaving group enantioselective allylic alkylation reaction and other aspects.Electric Literature of 34413-35-9

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider