Ark Pharm Inc. – Overview

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Ark Pharm, Inc. is located in Libertyville, IL, United States and is part of the Chemical and Allied Products Merchant Wholesalers Industry.

Found in 2007, Ark Pharm, Inc. is a leading supplier and manufacturer of research chemicals to pharmaceutical companies, universities, biotech companies, healthcare industries, contract research organizations etc. The founder of the company is Liangfu Huang(黄良富, larry huang)

Sep 2021 News The origin of a common compound about Methyl cinnoline-6-carboxylate

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While the job of a research scientist varies, most chemistry careers in research are based in laboratories, where research is conducted by teams following scientific methods and standards. 318276-74-3. Introduce a common compound, CAS is 318276-74-3, Name is Methyl cinnoline-6-carboxylate, belongs to cinnolinecompound.

A solution of the compound from example 3d) (345 mg; 1.8 mmol.) in anhydrous tetrahydrofuran (20.0 mL) was cooled to 5 oC for the portionwise addition of solid lithium aluminumhydride (70.0 mg; 1.8 mmol.) and stirred at 5 0C for 1 h. The mixture was quenched by the addition of ethyl acetate (50.0 mL) then water (5.0 mL), filtered through a pad of Celite and evaporated. The residue was dissolved in ethyl acetate (50.0 mL) and treated with manganese dioxide (0.50 g) and stirred at room temperature for 2 h. The mixture was filtered through a pad of Celite and evaporated to afford the title EPO compound (169 mg; 60%) as a brown powder which was used directly in the following step without further purification,

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Reference:
Patent; SMITHKLINE BEECHAM CORPORATION; WO2007/38331; (2007); A2;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

Sep 2021 News Chemical Properties and Facts of Cinnoline-4-carboxylic acid

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EXAMPLE 5 n-Propyl Cinnoline-4-carboxylate (5) A suspension of 870 mg of 1, and 850 mg of carbonyidimidazole (CDII) in 30 ml of tetrahydrofuran (THF) was stirred at room temperature until CO2 evolution ceased (ca. 30 minutes). After being stirred for 2 hours, the resulting mixture was treated with 320 mg of dry nypropanol and 3 drops of a 0.1 M solution of sodium imidazole in THE. The mixture was held at room temperature overnight, then the solvent was evaporated and the residue was partitioned between water and ether. The etheral extract was washed with saturated sodium bicarbonate solution, then with brine, then dried (MgSO4) and stripped in a rotary evaporator. The residue was chromatographed over silica gel, using a 1:1 v:v mixture of cyclohexane and ethyl acetate as eluent, to give 5, as a yellow oil.

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Reference:
Patent; E. I. Du Pont de Nemours and Company; US4699651; (1987); A;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

Sep 2021 News Archives for Chemistry Experiments of 3-Bromocinnoline

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Chemical engineers work across a number of sectors, processes differ within each of these areas, but chemistry and chemical engineering roles are found throughout, and are directly involved in the manufacturing process of chemical products and materials. 78593-33-6

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:
Patent; Sanofi; US4994474; (1991); A;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

13 Sep 2021 News Our Top Choice Compound: 3-Bromocinnoline

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While the job of a research scientist varies, most chemistry careers in research are based in laboratories, where research is conducted by teams following scientific methods and standards. 78593-33-6. Introduce a common compound, CAS is 78593-33-6, Name is 3-Bromocinnoline, belongs to cinnolinecompound.

(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%

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Reference:
Patent; Sanofi; US4957925; (1990); A;,
Cinnoline – Wikipedia
Cinnoline – an overview | ScienceDirect Topics

13 Sep 2021 News You Should Know Something about Cinnolin-4-ol

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Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. 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%., 875-66-1

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In the meantime we’ve collected together some recent articles in this area about 875-66-1 to whet your appetite. Happy reading! 875-66-1

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