Heterocyclic Building Blocks-Cinnoline

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To a suspension of 4-aminocinnoline-3-carboxamide (3.5 g, 18.60 mmol) in DCM (10 ml) was added POCI3 (43.3 ml, 465 mmol) followed by triethylamine (7.78 ml, 55.8 mmol). The mixture was refluxed for 7 h. The reaction was then allowed to cool to 11 and conc, in vacuo. The crude residuewas then carefully treated with saturated aqueous NaHCO3 at 0 C. A precipitate formed which was collected via vacuum filtration. The filter cake washed with water (-i00 ml,), collected, and driedvacuo to provide the title compound as a grey solid 4-aminocinnoiine-3-carbonitriie.

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Reference£º
Patent; PI INDUSTRIES LTD.; SAXENA, Rohit; PANMAND, Deepak Shankar; JENA, Lalit Kumar; SRIVASTAVA, Khushboo; RAJU, Jella Rama; MANJUNATHA, Sulur G; SAMANTA, Jatin; GARG, Ruchi; AUTKAR, Santosh Shridhar; VENKATESHA, Hagalavadi M; GADAKH, Ramdas Balu; KLAUSENER, Alexander G. M.; POSCHARNY, Konstantin; (219 pag.)WO2018/116072; (2018); A1;,
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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£º
Patent; BOEHRINGER INGELHEIM PHARMACEUTICALS, INC.; WO2004/63163; (2004); A1;,
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A new synthetic route of 21905-86-2

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One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 21905-86-2, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 21905-86-2, name is C9H6N2O2. In an article£¬Which mentioned a new discovery about 21905-86-2

10764] To a stirred solution of N1-cyclopropyl-5-fluo- robenzene-1,2-diamine mt-i (500 mg, 3.01 mmol) in DMF (5 mE) under an inert atmosphere was added cinnoline-4- carboxylic acid (524 mg, 3.01 mmol), HATU (1.71 g, 4.51 mmol) and diisopropylethylamine (1 mE, 6.02 mmol) at 00 C. The reaction mixture was stirred at room temperature for 16 h. Afier consumption of starting material (by TEC), the reaction mixture was diluted with water (20 mE) and extracted with EtOAc (2×20 mE). The combined organic extracts were washed with water (20 mE), dried over anhydrous Na2SO4 and concentrated under reduced pressure to obtain N-(2-(cyclopropylamino)-4-fluorophenyl) cinnoline4-carboxamide (500 mg, crude) as brown solid used in the next step without further purification.10765] EC-MS: m/z 322.9 [M+H] at 2.71 RT (38.30% purity).

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Reference£º
Patent; Viamet Pharmaceuticals (NC), Inc.; Sparks, Steven; Yates, Christopher M.; Shaver, Sammy R.; Hoekstra, William J.; (156 pag.)US2018/185362; (2018); A1;,
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New downstream synthetic route of 21905-86-2

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1-(Ethoxycarbonyl)ethyl Cinnoline-4-carboxylate (32) A solution of 0.75 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in 20 ml of benzene was added to a stirred suspension of 0.87 g of 1 in 30 ml of benzene at room temperature. After one hour of stirring, 1.36 g of ethyl 2-bromopropionate was added and the mixture was heated at reflux for 6 hours. The mixture was cooled, diluted with 25 ml of benzene, washed with water, 1 N aqueous sodium bicarbonate, and brine. It then was dried (MgSO4), the solvent was evaporated and the residue was chromatographed on silica gel, using a 1:1 v:v mixture of cyclohexane and ethyl acetate as eluent, to give 32, as a yellow oil.

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Patent; E. I. Du Pont de Nemours and Company; US4699651; (1987); A;,
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We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of Cinnoline-4-carboxylic acid,and how the biochemistry of the body works.21905-86-2

A solution of cinnoline-4-carboxylic acid (183 mg, 1.02 mmol) in methylene chloride (20 ml) was reacted with EDCI (195 mg, 1.02 mmol) and HOBt (138 mg, 1.02 mmol) for 20 min and then stirred, together with 4b-amino-9b-hydroxy-7-isopropyl-4b,9b-dihydro-5-oxa-indeno[2,1-a]-inden-10-one (250 mg, 0.85 mmol), overnight at room temperature. After extraction with methylene chloride and water, the organic layer was dried over MgSO4 and concentrated in a vacuum. Purification by column chromatography (ethylacetate:n-hexane=1:1) afforded the title compound as a white solid (290 mg, 63%). [0846] 1H-NMR (300 MHz, CD3OD) delta 1.15 (d, J=6.8 Hz, 6H, CH3), 2.82 (sep, J=6.8 Hz, 1H, CH), 6.69 (s, 1H, ArH), 6.89 (d, J=7.8 Hz, 1H, ArH), 7.45 (d, J=7.9 Hz, 1H, ArH), 7.65 (m, 1H, ArH), 7.858.03 (m, 5H, ArH) 8.42 (d, J=8.0 Hz, 1H, ArH), 8.51 (d, J=8.4 Hz, 1H, ArH), 9.45 (s, 1H, ArH).

Reference£º
Patent; KATHOLIEKE UNIVERSITEIT LEUVEN K.U. LEUVEN R & D; KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY; Jung, Young Sik; Lee, Chong Kgo; Kim, Hae Soo; Jeong, Hee Chun; Kim, Pil Ho; Han, Soo Bong; Shin, Jin Soo; Neyts, Johan; Thibaut, Hendrik Jan; US2014/114068; (2014); A1;,
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Extended knowledge of 38024-35-0

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 38024-35-0 is helpful to your research. 38024-35-0

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Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.78593-33-6, you can also check out more blogs about78593-33-6

78593-33-6,The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.3-Bromocinnoline,which mentioned a new discovery about 78593-33-6.

(a) 3-(4-Hydroxybenzenesulphonyl)cinnoline A mixture of 2.1 g (0.01 mol) of 3-bromocinnoline, 6.6 g (0.02 mol) of sodium 4-tosyloxybenzenesulphinate and 50ml of dimethylsulphoxide was stirred and heated at -20 C. for 24 hours. The mixture was poured into water and extracted with dichloroethane. The dichloroethane solution was washed with water, dried on anhydrous sodium sulphate and filtered. The solvent was then evaporated with a rotatory evaporator to provide 2.5 g of an oily residue. The desired product was then isolated by chromatography on a silica column using dichlorethane/methanol 98/2. In this manner, 0.45 g of 3-(4-hydroxybenzenesulphonyl)cinnoline was obtained. Yield 10.2%

Reference£º
Patent; Sanofi; US4957925; (1990); A;,
Cinnoline – Wikipedia
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Discovery of Cinnolin-4-ol

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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.

Reference£º
Patent; ARRAY BIOPHARMA INC.; WO2005/51304; (2005); A2;,
Cinnoline – Wikipedia
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Using the same procedure as that described above but from 3-bromocinnoline there was obtained 3-(4-methoxyphenylthio)cinnoline Yield: 74.6% M.P.: 108 C. (isopropanol)

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Reference£º
Patent; Sanofi; US4957925; (1990); A;,
Cinnoline – Wikipedia
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Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 21905-86-2 is helpful to your research. 21905-86-2

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a article,21905-86-2,introducing its new discovery.21905-86-2