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Example 20: Synthesis of 1- [4- (5-FLUORO-2-METHOXYPHENYL)-2-HYDROXY-4-METHYL-2- TRIFLUOROMETHYLPENTYL]-LH-CINNOLIN-4-ONE To a suspension of 2- [2- (5-fluoro-2-methoxyphenyl)-2-methylpropyl]-2-trifluoromethyloxirane (216 mg) and cinnolin-4-ol (V. G. Chapoulaud et AL., Tetrahedron, 2000,56, pp. 5499-5507) (216 mg) in anhydrous ethanol (1.2 ML) was added sodium ethoxide (21 wt. % solution in ethanol, 276 PL). After heating at 85C for 16 hours, the reaction mixture was diluted with ethyl acetate, dried over sodium sulfate, filtered, and concentrated in vacuo. The residue was purified by preparative TLC (eluted with 40% ethyl acetate-hexanes) to give the title compound as a pale yellow solid (26 mg), m. p. 122C-123C.

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Reference:
Patent; BOEHRINGER INGELHEIM PHARMACEUTICALS, INC.; WO2004/63163; (2004); A1;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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a. [4-CHLOROCINNOLINE] (9b). A mixture of 4-hydroxycinnoline (2.0 g, 13.7 mmol), phosphorus oxychloride (1.94 mL, 20.5 mmol), and pyridine (0.33 mL, 4.1 mmol) in [CHLOROBENZENE] (50 mL) was refluxed for 1 hour. Then the mixture was cooled and the solvent evaporated under vacuum, water was added, and the mixture was neutralized with solid sodium bicarbonate and extracted with chloroform (3 x 100 mL), washed with water (3 x 100 mL), dried [(MGS04)] and evaporated under vacuum, giving 1.84 g, in 82 % yield; [MP] [76-77 C] (lit mp 78 [C)] [; IH] NMR [(CDC13)] [8] 7.91 (m, 2H), 8.20 (dd, 1H, [J=6.] 2, [J=2.] 1), 8.57 (dd, 1H, J=6. 6, J=1. 8), 9.34 (s, [1H)] ; [13C NMR (CDCL3) No. ] 123.0, 124.9, 130.2, 131.6, 132.3, 133.8, 134.9, 144.4.

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Reference:
Patent; RUTGERS, THE STATE UNIVERSITY; LAVOIE, Edmond, J.; RUCHELMAN, Alexander, L.; LIU, Leroy, F.; WO2004/14906; (2004); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment.875-66-1. Introduce a common compound, CAS is 875-66-1, Name is Cinnolin-4-ol, belongs to cinnolinecompound.

Cinnolin-4(1H)-one (5.0 g, 34.24 mol) was added to the K2CO3 ( 7.08 g, 51.36 mol) and 3- bromoprop-1-yne (3.11 mL, 41.09 mol) in ACN (20 mL) and the mixture stirred at 80 C for 4-8 h then reaction mixture was cool to rt. The mixture was concentrated, diluted with H2O (30 mL), and extracted with EtOAc (3 × 50 mL). The combined organic layers were dried (MgSO4), filtered and concentrated. Flash chromatography gave 4-(prop-2-yn-1-yloxy)cinnoline (13a). Synthesis of 4-(prop-2-yn-1-yloxy)cinnoline (4a). Yield (2.60 g, 65.5%). m.p. 100-110 C. Colourless solid.1H NMR (400 MHz, CDCl3) delta 8.34 (dd, J = 1.2, 1.2 Hz, 1H, Ar), 7.81-7.77 (m, 2H, Ar), 7.60 (d, J = 8.8 Hz, 1H, Ar), 7.46 (t, J = 8.0 Hz,1H, Ar), 5.14 (d, J = 2.4 Hz, 1H, -OCH2), 2.51 (t, J = 2.4 Hz, 1H, Alky). 13C NMR (100 MHz, CDCl3) delta 171.2, 140.6, 140.1, 134.0, 126.0, 125.2, 124.6, 115.1, 76.0, 75.7, 46.2. ESI-MS: m/z 185.27 [M+H]+. Anal. Calc. (C11H8N2O) C: 71.73; H: 4.38; N: 15.21. Found C: 71.80; H: 4.04; N: 15.28%., 875-66-1

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Reference:
Article; Boda, Sathish Kumar; Bommagani, Mohan Babu; Chitneni, Prasad Rao; Mokenapelli, Sudhakar; Yerrabelli, Jayaprakash Rao; Synthetic Communications; (2020);,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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Therefore, this conceptually novel strategy might open impressive avenues to establish green and sustainable chemistry platforms.In my other articles, you can also check out more blogs about Cinnolin-4-ol.875-66-1

Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment.875-66-1. Introduce a common compound, CAS is 875-66-1, Name is Cinnolin-4-ol, belongs to cinnolinecompound.

Cinnolin-4(1H)-one (5.0 g, 34.24 mol) was added to the K2CO3 ( 7.08 g, 51.36 mol) and 3- bromoprop-1-yne (3.11 mL, 41.09 mol) in ACN (20 mL) and the mixture stirred at 80 C for 4-8 h then reaction mixture was cool to rt. The mixture was concentrated, diluted with H2O (30 mL), and extracted with EtOAc (3 × 50 mL). The combined organic layers were dried (MgSO4), filtered and concentrated. Flash chromatography gave 4-(prop-2-yn-1-yloxy)cinnoline (13a). Synthesis of 4-(prop-2-yn-1-yloxy)cinnoline (4a). Yield (2.60 g, 65.5%). m.p. 100-110 C. Colourless solid.1H NMR (400 MHz, CDCl3) delta 8.34 (dd, J = 1.2, 1.2 Hz, 1H, Ar), 7.81-7.77 (m, 2H, Ar), 7.60 (d, J = 8.8 Hz, 1H, Ar), 7.46 (t, J = 8.0 Hz,1H, Ar), 5.14 (d, J = 2.4 Hz, 1H, -OCH2), 2.51 (t, J = 2.4 Hz, 1H, Alky). 13C NMR (100 MHz, CDCl3) delta 171.2, 140.6, 140.1, 134.0, 126.0, 125.2, 124.6, 115.1, 76.0, 75.7, 46.2. ESI-MS: m/z 185.27 [M+H]+. Anal. Calc. (C11H8N2O) C: 71.73; H: 4.38; N: 15.21. Found C: 71.80; H: 4.04; N: 15.28%.

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Reference:
Article; Boda, Sathish Kumar; Bommagani, Mohan Babu; Chitneni, Prasad Rao; Mokenapelli, Sudhakar; Yerrabelli, Jayaprakash Rao; Synthetic Communications; (2020);,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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a. [4-CHLOROCINNOLINE] (9b). A mixture of 4-hydroxycinnoline (2.0 g, 13.7 mmol), phosphorus oxychloride (1.94 mL, 20.5 mmol), and pyridine (0.33 mL, 4.1 mmol) in [CHLOROBENZENE] (50 mL) was refluxed for 1 hour. Then the mixture was cooled and the solvent evaporated under vacuum, water was added, and the mixture was neutralized with solid sodium bicarbonate and extracted with chloroform (3 x 100 mL), washed with water (3 x 100 mL), dried [(MGS04)] and evaporated under vacuum, giving 1.84 g, in 82 % yield; [MP] [76-77 C] (lit mp 78 [C)] [; IH] NMR [(CDC13)] [8] 7.91 (m, 2H), 8.20 (dd, 1H, [J=6.] 2, [J=2.] 1), 8.57 (dd, 1H, J=6. 6, J=1. 8), 9.34 (s, [1H)] ; [13C NMR (CDCL3) No. ] 123.0, 124.9, 130.2, 131.6, 132.3, 133.8, 134.9, 144.4.

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Reference:
Patent; RUTGERS, THE STATE UNIVERSITY; LAVOIE, Edmond, J.; RUCHELMAN, Alexander, L.; LIU, Leroy, F.; WO2004/14906; (2004); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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a. [4-CHLOROCINNOLINE] (9b). A mixture of 4-hydroxycinnoline (2.0 g, 13.7 mmol), phosphorus oxychloride (1.94 mL, 20.5 mmol), and pyridine (0.33 mL, 4.1 mmol) in [CHLOROBENZENE] (50 mL) was refluxed for 1 hour. Then the mixture was cooled and the solvent evaporated under vacuum, water was added, and the mixture was neutralized with solid sodium bicarbonate and extracted with chloroform (3 x 100 mL), washed with water (3 x 100 mL), dried [(MGS04)] and evaporated under vacuum, giving 1.84 g, in 82 % yield; [MP] [76-77 C] (lit mp 78 [C)] [; IH] NMR [(CDC13)] [8] 7.91 (m, 2H), 8.20 (dd, 1H, [J=6.] 2, [J=2.] 1), 8.57 (dd, 1H, J=6. 6, J=1. 8), 9.34 (s, [1H)] ; [13C NMR (CDCL3) No. ] 123.0, 124.9, 130.2, 131.6, 132.3, 133.8, 134.9, 144.4.

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Reference:
Patent; RUTGERS, THE STATE UNIVERSITY; LAVOIE, Edmond, J.; RUCHELMAN, Alexander, L.; LIU, Leroy, F.; WO2004/14906; (2004); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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The result showed that such a combination of chemo- and biocatalysis improved the catalytic yield more than two times compared with that of sole metal catalysis.I hope my blog about Cinnolin-4-ol is helpful to your research.875-66-1

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To a suspension of NaH (60% in mineral oil, 0.099 g, 2.46 mmol) in DMF (5 mL) was added cinnolin-4-ol (prepared from 2-aminoacetophenone according to the procedures described in U. S. Patent No. 4,620, 000), 0. 300 g, 2.05 mmol) in DMF (2 mL) dropwise. The reaction mixture was warmed at 40 C and stirred for 30 minutes. After cooling, N-phenyltrifluoromethanesulfonimide (0.880 g, 2.46 mmol) in DMF (2 mL) was added, and the reaction mixture was stirred at room temperature for 1 hour. 1-Boc piperazine (0.765 g, 4.11 mmol) was added to the mixture. The reaction was stirred at 80 C for 4 hours. After cooling, the mixture was partitioned between EtOAc and water. The aqueous phase was extracted with EtOAc. The combined organic layers were washed with water, brine, dried and concentrated. The residue was purified by column chromatography (1: 1 to 1: 3 hexanes/EtOAc) to give 4- Cinnolin-4-yl-piperazine-l-carboxylic acid tert-butyl ester (0.246 g, 38%) as a yellow oil. 1H NMR (CDC13, 400 MHz) 8 8. 91 (s, 1H), 8. 47 (d, J= 8.4 Hz, 1H), 7.97 (d, J= 8. 4 Hz, 1H), 7.80 (t, J= 7.2 Hz, 1H), 7.69 (t, J= 7.2 Hz, 1H), 3.74 (m, 4H), 3. 34 (m, 4H), 1.51 (s, 9H). LCMS (APCI+) tnlz 315 [M+H]’ ; Rt = 2.14 minutes.

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Reference:
Patent; ARRAY BIOPHARMA INC.; WO2005/51304; (2005); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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a. [4-CHLOROCINNOLINE] (9b). A mixture of 4-hydroxycinnoline (2.0 g, 13.7 mmol), phosphorus oxychloride (1.94 mL, 20.5 mmol), and pyridine (0.33 mL, 4.1 mmol) in [CHLOROBENZENE] (50 mL) was refluxed for 1 hour. Then the mixture was cooled and the solvent evaporated under vacuum, water was added, and the mixture was neutralized with solid sodium bicarbonate and extracted with chloroform (3 x 100 mL), washed with water (3 x 100 mL), dried [(MGS04)] and evaporated under vacuum, giving 1.84 g, in 82 % yield; [MP] [76-77 C] (lit mp 78 [C)] [; IH] NMR [(CDC13)] [8] 7.91 (m, 2H), 8.20 (dd, 1H, [J=6.] 2, [J=2.] 1), 8.57 (dd, 1H, J=6. 6, J=1. 8), 9.34 (s, [1H)] ; [13C NMR (CDCL3) No. ] 123.0, 124.9, 130.2, 131.6, 132.3, 133.8, 134.9, 144.4.

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Reference:
Patent; RUTGERS, THE STATE UNIVERSITY; LAVOIE, Edmond, J.; RUCHELMAN, Alexander, L.; LIU, Leroy, F.; WO2004/14906; (2004); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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a. 4-Chloro-8-nitroquinoline (6a). This intermediate was prepared from 4-chloroquinoline (obtained by treating 4-hydroxyquinoline with [POC13] as [ DESCRIBED BY GOULEY, R. W., ET AL. , J. AMER. CHEM. SOC., 1947, 69, 303-306.4-] Chloroquinoline (10.0 g, 61.3 mmol) was added in small portions to sulfuric acid (45 mL) taking care to maintain the temperature at or below 15 C. Then the solution was cooled and maintained at-15 C during the addition of fuming nitric acid (9 mL). The mixture was allowed to warm to room temperature and stirred for an additional 3 hours. The reaction mix was poured on ice and basified (pH 9) with NH40H. The resulting precipitate was filtered, washed well with water, dried, and recrystallized from methanol to provide 7.5 g of 6a, in 59 % yield; m. p. = [128-129 C] (lit. m. p. = [129-130 C) ; IH] NMR [(CDC13)] [8] 7.67 (d, [1H,] J=4. 5), 7.75 (dd, 1H, J=8. 6 [HZ,] J=7. 6), 8.10 (dd, 1H, J=7. 6, J=1. 3), 8. 48 (dd, 1H,. [J=8.] [6,] J=1.3), 8.94 (d, 1H, J=4. 5); [13C] NMR [(CDC13)] [8] 123.0, 124.4, 126.5, 127.5, 128.3, 140.6, 143.2, 148.7, 152.1.

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Reference:
Patent; RUTGERS, THE STATE UNIVERSITY; LAVOIE, Edmond, J.; RUCHELMAN, Alexander, L.; LIU, Leroy, F.; WO2004/14906; (2004); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

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You could be based in a university, combining chemical research with teaching; in a pharmaceutical company, working on developing and trialing new drugs, helping to ensure national healthcare provision keeps pace. Introduce a common compound, CAS is 875-66-1, Name is Cinnolin-4-ol, belongs to cinnoline compound. 875-66-1

Cinnolin-4(1H)-one (5.0 g, 34.24 mol) was added to the K2CO3 ( 7.08 g, 51.36 mol) and 3- bromoprop-1-yne (3.11 mL, 41.09 mol) in ACN (20 mL) and the mixture stirred at 80 C for 4-8 h then reaction mixture was cool to rt. The mixture was concentrated, diluted with H2O (30 mL), and extracted with EtOAc (3 × 50 mL). The combined organic layers were dried (MgSO4), filtered and concentrated. Flash chromatography gave 4-(prop-2-yn-1-yloxy)cinnoline (13a). Synthesis of 4-(prop-2-yn-1-yloxy)cinnoline (4a). Yield (2.60 g, 65.5%). m.p. 100-110 C. Colourless solid.1H NMR (400 MHz, CDCl3) delta 8.34 (dd, J = 1.2, 1.2 Hz, 1H, Ar), 7.81-7.77 (m, 2H, Ar), 7.60 (d, J = 8.8 Hz, 1H, Ar), 7.46 (t, J = 8.0 Hz,1H, Ar), 5.14 (d, J = 2.4 Hz, 1H, -OCH2), 2.51 (t, J = 2.4 Hz, 1H, Alky). 13C NMR (100 MHz, CDCl3) delta 171.2, 140.6, 140.1, 134.0, 126.0, 125.2, 124.6, 115.1, 76.0, 75.7, 46.2. ESI-MS: m/z 185.27 [M+H]+. Anal. Calc. (C11H8N2O) C: 71.73; H: 4.38; N: 15.21. Found C: 71.80; H: 4.04; N: 15.28%.

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Reference:
Article; Boda, Sathish Kumar; Bommagani, Mohan Babu; Chitneni, Prasad Rao; Mokenapelli, Sudhakar; Yerrabelli, Jayaprakash Rao; Synthetic Communications; (2020);,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics