Category: quinoxaline

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.

Here is a brief introduction to this compound(221012-82-4)Quality Control 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

Recommanded Product: 19777-66-3. 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: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about Structure and magnetic properties of a chiral two-dimensional ferrimagnet with TC of 38 K.

The construction of mol.-based magnetic materials, which possess addnl. properties such as conductivity, photoreactivity, or optical properties, is discussed. The synthesis and crystal structure and optical and magnetic properties of a new 2D fully chiral ferrimagnet; [{Cr(CN)6}{Mn(S)-pnH(H2O)}](H2O), where [(S)-pn=(S)-1,2-diaminopropane], is described. X-ray structural anal. found an orthorhombic unit cell and the structure revealed the formation of a two-dimensional chiral network. The magnetic transition temperature at 38K was relatively high. Field cooled and zero field cooled susceptibility χmolT and magnetic moments were determined The MCD spectra and Faraday effect was shown.

Here is a brief introduction to this compound(19777-66-3)Recommanded Product: 19777-66-3, if you want to know about other compounds related to this compound(19777-66-3), you can read my other articles.

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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: 1127-45-3, is researched, SMILESS is OC1=CC=CC2=CC=C[N+]([O-])=C12, Molecular C9H7NO2Journal, Article, Acta Crystallographica, Section E: Structure Reports Online called catena-Poly[[[diaquabis(8-hydroxyquinoline N-oxide-κO1)cobalt(II)]-μ-2,5-dimethylpyrazine 1,4-dioxide-κ2O1:O4] bis(perchlorate)], Author is Gu, Li Qin; Li, Jin Min, the main research direction is cobalt hydroxylquinolineoxide dimethylpyrazinedioxide aqua complex perchlorate crystal structure; supramol mol structure cobalt hydroxylquinolineoxide dimethylpyrazinedioxide aqua complex perchlorate; hydrogen bond cobalt hydroxylquinolineoxide dimethylpyrazinedioxide aqua complex perchlorate; pi stacking cobalt hydroxylquinolineoxide dimethylpyrazinedioxide aqua complex perchlorate.Name: 8-Hydroxyquinoline 1-oxide.

In the title complex, {[Co(C6H8N2O2)(C9H7NO2)(H2O)2](ClO4)2}n, the CoII ion lies on an inversion center and is coordinated in a slightly distorted octahedral environment. The 2,5-dimethylpyrazine 1,4-dioxide ligand, which also lies on an inversion center, acts as a bridging ligand, linking symmetry-related CoII ions [Co…Co = 8.669 (3) Å] and forming one-dimensional chains along the b axis. In the crystal structure, these chains are linked by intermol. aqua-perchlorate O-H…O hydrogen bonds, forming two-dimensional layers which are in turn connected into a three-dimensional network via π-π stacking interactions between quinoline rings, with a centroid-centroid distance of 3.580 (3) Å. An intermol. O-H…Cl interaction is also present. Crystallog. data are given.

Here is a brief introduction to this compound(1127-45-3)Name: 8-Hydroxyquinoline 1-oxide, if you want to know about other compounds related to this compound(1127-45-3), you can read my other articles.

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

91895-29-3, 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 88 Preparation of 6,7-Difluoro-5-nitro-1,4-dihydro-2,3-quinoxalinedione To a suspension of 6,7-difluoro-1,4-dihydro-2,3-quinoxalinedione (837 mg, 4.23 mmol) in trifluoracetic acid (30 mL) was added KNO3 (512 mg, 5.07 mmol). The mixture was stirred at 55 C. for 20 h at the end of this time, 256 mg (2.50 mmol) of KNO3 was added and the reaction mixture was stirred at 55 C. for 20 h, then another 256 mg (2.50 mmol) of KNO3 was added and the mixture was stirred at 55 C. for 20 h. The reaction mixture was then rota-evaporated to dryness. To the residual solid was added ice-cold water (about 15 mL), the solid was collected by vacuum filtration, washed with ice-cold water (5*5 mL), and dried at 40 C. under 1 mm Hg for 14 h, giving 700 mg (68%) of the title compound as a yellow powder. Mp 288-90 C. (dec.). IR (KBr) 3424, 3226, 1752, 1717, 1554, 1356, 1304 cm-1. 1 H NMR (DMSO-d6): 12.249 (s, 1H), 11.864 (bs, 1H), 7.330 (dd, 1H, J=10.5, 7.8 Hz). Analysis for C8 H3 F2 N3 O4, calcd: C, 39.50, H, 1.24, N, 17.29; found: C, 39.42, H, 1.26, N, 17.08., 91895-29-3

91895-29-3 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione 822839, aquinoxaline compound, is more and more widely used in various fields.

Reference：
Patent; The State of Oregon, acting by and through The Oregon State Board of Higher Education, acting for and on behalf of The Oregon Health Sciences University; The University of Oregon; The Regents of the University of California; US5514680; (1996); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

62163-09-1, 5-Chloroquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,62163-09-1

EXAMPLE IV 5-(1-piperazinyl)quinoxalin, hydrochloride. 0.2 Mol (33.5 g) of 5-chloroquinoxalin and 2.1 mol (184 g) of piperazine were mixed in 180 ml of ethylene glycol and refluxed for 20 hours. The reaction mixture was poured on ice and acidified with concentrated hydrochloric acid and then extracted with 3*200 ml of ether. The water layer was made alkaline while cooling with ice, with 50% sodium hydroxide and then extracted with 3*600 ml of methylene chloride. The combined methylene chloride solution was washed successively with 1 l of 1N sodium hydroxide and a mixture of 925 ml of a saturated saline solution and 75 ml of 50% potassium hydroxide. The organic solution was dried on sodium sulphate and was then evaporated to dryness in vacuo. The residue was chromatographed over silica gel with a mixture of methylene chloride, methanol, and 25% ammonia (92:7.5:0.5) as eluent. The resulting free base was dissolved in ethanol and 1 equivalent of hydrochloric acid in ethanol was added. The title compound was obtained with a melting-point of 271-272 C.

The synthetic route of 62163-09-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Duphar International Research B.V.; US5424313; (1995); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

91895-29-3, 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 88 Preparation of 6,7-Difluoro-5-nitro-1,4-dihydro-2,3-quinoxalinedione To a suspension of 6,7-difluoro-1,4-dihydro-2,3-quinoxalinedione (837 mg, 4.23 mmol) in trifluoracetic acid (30 mL) was added KNO3 (512 mg, 5.07 mmol). The mixture was stirred at 55 C. for 20 h at the end of this time, 256 mg (2.50 mmol) of KNO3 was added and the reaction mixture was stirred at 55 C. for 20 h, then another 256 mg (2.50 mmol) of KNO3 was added and the mixture was stirred at 55 C. for 20 h. The reaction mixture was then rota-evaporated to dryness. To the residual solid was added ice-cold water (about 15 mL), the solid was collected by vacuum filtration, washed with ice-cold water (5*5 mL), and dried at 40 C. under 1 mm Hg for 14 h, giving 700 mg (68%) of the title compound as a yellow powder. Mp 288-90 C. (dec.). IR (KBr) 3424, 3226, 1752, 1717, 1554, 1356, 1304 cm-1. 1 H NMR (DMSO-d6): 12.249 (s, 1H), 11.864 (bs, 1H), 7.330 (dd, 1H, J=10.5, 7.8 Hz). Analysis for C8 H3 F2 N3 O4, calcd: C, 39.50, H, 1.24, N, 17.29; found: C, 39.42, H, 1.26, N, 17.08., 91895-29-3

91895-29-3 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione 822839, aquinoxaline compound, is more and more widely used in various fields.

Reference：
Patent; The State of Oregon, acting by and through The Oregon State Board of Higher Education, acting for and on behalf of The Oregon Health Sciences University; The University of Oregon; The Regents of the University of California; US5514680; (1996); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

62163-09-1, 5-Chloroquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,62163-09-1

EXAMPLE IV 5-(1-piperazinyl)quinoxalin, hydrochloride. 0.2 Mol (33.5 g) of 5-chloroquinoxalin and 2.1 mol (184 g) of piperazine were mixed in 180 ml of ethylene glycol and refluxed for 20 hours. The reaction mixture was poured on ice and acidified with concentrated hydrochloric acid and then extracted with 3*200 ml of ether. The water layer was made alkaline while cooling with ice, with 50% sodium hydroxide and then extracted with 3*600 ml of methylene chloride. The combined methylene chloride solution was washed successively with 1 l of 1N sodium hydroxide and a mixture of 925 ml of a saturated saline solution and 75 ml of 50% potassium hydroxide. The organic solution was dried on sodium sulphate and was then evaporated to dryness in vacuo. The residue was chromatographed over silica gel with a mixture of methylene chloride, methanol, and 25% ammonia (92:7.5:0.5) as eluent. The resulting free base was dissolved in ethanol and 1 equivalent of hydrochloric acid in ethanol was added. The title compound was obtained with a melting-point of 271-272 C.

The synthetic route of 62163-09-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Duphar International Research B.V.; US5424313; (1995); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

91895-29-3, 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 88 Preparation of 6,7-Difluoro-5-nitro-1,4-dihydro-2,3-quinoxalinedione To a suspension of 6,7-difluoro-1,4-dihydro-2,3-quinoxalinedione (837 mg, 4.23 mmol) in trifluoracetic acid (30 mL) was added KNO3 (512 mg, 5.07 mmol). The mixture was stirred at 55 C. for 20 h at the end of this time, 256 mg (2.50 mmol) of KNO3 was added and the reaction mixture was stirred at 55 C. for 20 h, then another 256 mg (2.50 mmol) of KNO3 was added and the mixture was stirred at 55 C. for 20 h. The reaction mixture was then rota-evaporated to dryness. To the residual solid was added ice-cold water (about 15 mL), the solid was collected by vacuum filtration, washed with ice-cold water (5*5 mL), and dried at 40 C. under 1 mm Hg for 14 h, giving 700 mg (68%) of the title compound as a yellow powder. Mp 288-90 C. (dec.). IR (KBr) 3424, 3226, 1752, 1717, 1554, 1356, 1304 cm-1. 1 H NMR (DMSO-d6): 12.249 (s, 1H), 11.864 (bs, 1H), 7.330 (dd, 1H, J=10.5, 7.8 Hz). Analysis for C8 H3 F2 N3 O4, calcd: C, 39.50, H, 1.24, N, 17.29; found: C, 39.42, H, 1.26, N, 17.08., 91895-29-3

91895-29-3 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione 822839, aquinoxaline compound, is more and more widely used in various fields.

Reference：
Patent; The State of Oregon, acting by and through The Oregon State Board of Higher Education, acting for and on behalf of The Oregon Health Sciences University; The University of Oregon; The Regents of the University of California; US5514680; (1996); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

62163-09-1, 5-Chloroquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,62163-09-1

EXAMPLE IV 5-(1-piperazinyl)quinoxalin, hydrochloride. 0.2 Mol (33.5 g) of 5-chloroquinoxalin and 2.1 mol (184 g) of piperazine were mixed in 180 ml of ethylene glycol and refluxed for 20 hours. The reaction mixture was poured on ice and acidified with concentrated hydrochloric acid and then extracted with 3*200 ml of ether. The water layer was made alkaline while cooling with ice, with 50% sodium hydroxide and then extracted with 3*600 ml of methylene chloride. The combined methylene chloride solution was washed successively with 1 l of 1N sodium hydroxide and a mixture of 925 ml of a saturated saline solution and 75 ml of 50% potassium hydroxide. The organic solution was dried on sodium sulphate and was then evaporated to dryness in vacuo. The residue was chromatographed over silica gel with a mixture of methylene chloride, methanol, and 25% ammonia (92:7.5:0.5) as eluent. The resulting free base was dissolved in ethanol and 1 equivalent of hydrochloric acid in ethanol was added. The title compound was obtained with a melting-point of 271-272 C.

The synthetic route of 62163-09-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Duphar International Research B.V.; US5424313; (1995); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

91895-29-3, 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 88 Preparation of 6,7-Difluoro-5-nitro-1,4-dihydro-2,3-quinoxalinedione To a suspension of 6,7-difluoro-1,4-dihydro-2,3-quinoxalinedione (837 mg, 4.23 mmol) in trifluoracetic acid (30 mL) was added KNO3 (512 mg, 5.07 mmol). The mixture was stirred at 55 C. for 20 h at the end of this time, 256 mg (2.50 mmol) of KNO3 was added and the reaction mixture was stirred at 55 C. for 20 h, then another 256 mg (2.50 mmol) of KNO3 was added and the mixture was stirred at 55 C. for 20 h. The reaction mixture was then rota-evaporated to dryness. To the residual solid was added ice-cold water (about 15 mL), the solid was collected by vacuum filtration, washed with ice-cold water (5*5 mL), and dried at 40 C. under 1 mm Hg for 14 h, giving 700 mg (68%) of the title compound as a yellow powder. Mp 288-90 C. (dec.). IR (KBr) 3424, 3226, 1752, 1717, 1554, 1356, 1304 cm-1. 1 H NMR (DMSO-d6): 12.249 (s, 1H), 11.864 (bs, 1H), 7.330 (dd, 1H, J=10.5, 7.8 Hz). Analysis for C8 H3 F2 N3 O4, calcd: C, 39.50, H, 1.24, N, 17.29; found: C, 39.42, H, 1.26, N, 17.08., 91895-29-3

91895-29-3 6,7-Difluoroquinoxaline-2,3(1H,4H)-dione 822839, aquinoxaline compound, is more and more widely used in various fields.

Reference：
Patent; The State of Oregon, acting by and through The Oregon State Board of Higher Education, acting for and on behalf of The Oregon Health Sciences University; The University of Oregon; The Regents of the University of California; US5514680; (1996); A;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider