Production Method 1

1151-14-0

84-51-5

Reaction Conditions

1.1 1.5 h, 260 - 280 °C

Reference

A green synthesis of 2-ethylanthraquinone from 2-(4'-ethylbenzoyl)benzoic acid over H-beta zeolite

Xu, Renshun; et al, Catalysis Letters, 2006, 107(3-4), 149-154

Production Method 2

26708-04-3

84-51-5

Reaction Conditions

1.1 Reagents: N-Bromosuccinimide ,  Sulfuric acid Solvents: Tetrahydrofuran ,  Water
1.2 Reagents: Sodium bicarbonate
1.3 Solvents: Ethyl acetate

Reference

Facile oxidation of fused 1,4-dimethoxybenzenes to 1,4-quinones using NBS: fine-tuned control over bromination and oxidation reactions

Kim, Dong Wook; et al, Organic Letters, 2001, 3(3), 445-447

Production Method 3

84-51-5

Reaction Conditions

1.1 Catalysts: Silica (sulfuric acid catalyst) ,  Sulfuric acid (silica catalyst) Solvents: Tetrahydrofuran ;  65 min, 90 - 100 °C

Reference

Facile and Efficient One-Pot Synthesis of Anthraquinones from Benzene Derivatives Catalyzed by Silica Sulfuric Acid

Naeimi, Hossein; et al, Polycyclic Aromatic Compounds, 2014, 34(5), 504-517

Production Method 4

84-51-5

Reaction Conditions

1.1 Catalysts: Citric acid

Reference

Dehydration of 2-(4'-ethylbenzoyl)benzoic acid to 2-ethylanthraquinone over H-β zeolite impregnated with citric acid

Zhai, Lingjuan; et al, Cuihua Xuebao, 2008, 29(8), 701-704

Production Method 5

839-73-6

84-51-5

Reaction Conditions

1.1 Reagents: Oxygen Solvents: Mesitylene ,  Trioctyl phosphate ,  Water ;  rt

Reference

Pd/MgAl-LDH nanocatalyst with vacancy-rich sandwich structure: Insight into interfacial effect for selective hydrogenation

Miao, Chenglin; et al, Journal of Catalysis, 2019, 370, 107-117

Production Method 6

839-73-6

84-51-5

Reaction Conditions

1.1 Catalysts: Palladium Solvents: 1-Decanol ;  overnight, rt; 60 °C
1.2 Reagents: Oxygen Solvents: 1-Decanol ;  30 min, rt

Reference

Activation of O2 by Organosilicon Reagents Yields Quantitative Amounts of H2O2 or (Me3Si)2O2 for Efficient O-Transfer Reactions

Yamamoto, Keishi; et al, Helvetica Chimica Acta, 2018, 101(12),

Production Method 7

15547-17-8

84-51-5

68279-54-9

Reaction Conditions

1.1 Catalysts: Calcium oxide ,  Manganese oxide (MnO2) ,  Alumina ;  48 h, rt

Reference

Catalytic regeneration of ethylanthraquinone working solution by CaO and MnO2 double modified γ-Al2O3 catalyst

Cheng, Yi; et al, Huaxue Fanying Gongcheng Yu Gongyi, 2018, 34(5), 431-439

Production Method 8

1151-14-0

84-51-5

Reaction Conditions

1.1 Catalysts: Citric acid ;  40 - 50 min, 256 - 258 °C

Reference

A highly effective method for the synthesis of 2-ethylanthraquinone

Xu, Ren-Shun; et al, Yingyong Huaxue, 2006, 23(7), 812-814

Production Method 9

26708-04-3

84-51-5

Reaction Conditions

1.1 Reagents: Bis(trifluoroacetoxy)iodobenzene Solvents: Methanol ,  Water

Reference

Novel and efficient synthesis of p-quinones in water via oxidative demethylation of phenol ethers using hypervalent iodine(III) reagents

Tohma, H.; et al, Tetrahedron Letters, 2001, 42(39), 6899-6902

Production Method 10

26708-04-3

84-51-5

Reaction Conditions

1.1 Reagents: Potassium peroxymonosulfate sulfate (2KHSO5.KHSO4.K2SO4) Catalysts: 4-Iodophenoxyacetic acid Solvents: 2,2,2-Trifluoroethanol ,  Water ;  2.0 h, rt

Reference

Hypervalent iodine oxidation of phenol derivatives using a catalytic amount of 4-iodophenoxyacetic acid and Oxone as a co-oxidant

Yakura, Takayuki; et al, Tetrahedron, 2010, 66(31), 5833-5840

Production Method 11

62167-65-1

84-51-5

Reaction Conditions

1.1 Reagents: Nitrous oxide Catalysts: (OC-6-12)-Dioxo[5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-21H,23H-porphinato(2-… Solvents: Benzene ;  20 h, 10 atm, 200 °C

Reference

Nitrous oxide oxidation catalyzed by ruthenium porphyrin complex

Tanaka, Hirotaka; et al, Bulletin of the Chemical Society of Japan, 2004, 77(10), 1905-1914

Production Method 12

62167-65-1

84-51-5

Reaction Conditions

1.1 Reagents: Nitrous oxide Catalysts: (OC-6-12)-Dioxo[5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-21H,23H-porphinato(2-… Solvents: Benzene

Reference

Selective nitrous oxide oxidation for C-H oxidation and aromatization of 9,10-dihydroanthracene derivatives

Hashimoto, Kentaro; et al, Chemistry Letters, 2002, (6), 582-583

Production Method 13

15547-17-8

84-51-5

Reaction Conditions

1.1 Reagents: Oxygen

Reference

Solvents for hydrogen peroxide preparation by the anthraquinone process

, European Patent Organization, , ,

Production Method 14

839-73-6

84-51-5

Reaction Conditions

1.1 Reagents: Oxygen ;  15 - 20 min, rt

Reference

Role of phosphorus in the formation of selective palladium catalysts for hydrogenation of alkylanthraquinones

Belykh, Lyudmila B.; et al, Applied Catalysis, 2020, 589,

Production Method 15

1296785-63-1

84-51-5

100-09-4

Reaction Conditions

1.1 Solvents: Methanol ,  Water

Reference

The solvent effect on the photodeprotection of anthraquinone protected carboxylic acid unravelled by time-resolved spectroscopic studies

Guo, Yan; et al, Physical Chemistry Chemical Physics, 2019, 21(27), 14598-14604

2-Ethylanthraquinone Raw materials

• Anthracene,2-ethyl-9,10-dimethoxy-
• Anthracene, 2-ethyl-9,10-dihydro-
• 9,10-Anthracenedione,6-ethyl-1,2,3,4-tetrahydro-
• 2-(4-Ethylbenzoyl)benzoic acid
• 9,10-Anthracenediol, 2-ethyl-
• 1-(9,10-Dihydro-9,10-dioxo-2-anthracenyl)ethyl 4-methoxybenzoate

2-Ethylanthraquinone Preparation Products

• p-Anisic acid (100-09-4)
• 6-ethyl-1,2,3,4-tetrahydroanthracene-9,10-diol (68279-54-9)
• 2-Ethylanthraquinone (84-51-5)

• 1. An assay for the enzyme N-acetyl-β-d-glucosaminidase (NAGase) based on electrochemical detection using screen-printed carbon electrodes (SPCEs)
  R. M. Pemberton,J. P. Hart,T. T. Mottram Analyst, 2001,126, 1866-1871
• 2. An ionic liquid-mesoporous silica blend as a novel adsorbent for the adsorption and recovery of palladium ions, and its applications in continuous flow study and as an industrial catalyst?
  Shivani Sharma,Chia-Ming Wu,Ranjit T. Koodali,N. Rajesh RSC Adv., 2016,6, 26668-26678
• 3. An aptasensor for detection of potassium ions based on RecJf exonuclease mediated signal amplification
  Bidou Wang,Xifeng Chen Analyst, 2014,139, 5695-5699
• 4. An automatic determination of thoria in thoria-urania mixtures
  Analyst, 1966,91, 208-210
• 5. An artificial CO-releasing metalloprotein built by histidine-selective metallation?
  Inês S. Albuquerque,Hélia F. Jeremias,Miguel Chaves-Ferreira,Dijana Matak-Vinkovic,Omar Boutureira,Carlos C. Rom?o Chem. Commun., 2015,51, 3993-3996

• Solvents and Organic Chemicals Organic Compounds Benzenoids Anthracenes Anthraquinones
• Anthraquinones

2-Ethylanthraquinone: A Comprehensive Overview

2-Ethylanthraquinone, also known by its CAS No. 84-51-5, is a versatile organic compound with significant applications in various fields of science and industry. This compound, belonging to the anthraquinone family, has garnered attention due to its unique chemical properties and potential uses in materials science, pharmaceuticals, and organic synthesis. In recent years, advancements in synthetic methodologies and its applications have further solidified its importance in both academic and industrial research.

The molecular structure of 2-Ethylanthraquinone consists of an anthracene backbone with a ketone group at the 2-position and an ethyl substituent. This structure contributes to its aromatic stability and reactivity, making it a valuable precursor in organic synthesis. Researchers have explored its role in the development of novel materials, such as conductive polymers and organic semiconductors, where its electronic properties play a pivotal role.

One of the most notable advancements involving 2-Ethylanthraquinone is its application in the field of electrochemistry. Recent studies have demonstrated its potential as an efficient electron transfer mediator in dye-sensitized solar cells (DSSCs). The compound's ability to facilitate charge transport and enhance energy conversion efficiency has been extensively investigated, with promising results that could pave the way for more sustainable energy solutions.

In the pharmaceutical sector, 2-Ethylanthraquinone has shown potential as a precursor for bioactive compounds. Its derivatives have been studied for their antioxidant and anti-inflammatory properties, which could be harnessed for therapeutic applications. For instance, researchers have reported that certain derivatives exhibit potent radical scavenging activity, making them candidates for combating oxidative stress-related diseases.

The synthesis of 2-Ethylanthraquinone has also seen significant improvements. Traditional methods often involved multi-step reactions with low yields, but recent developments in catalytic systems and green chemistry have enabled more efficient and environmentally friendly production processes. These advancements not only reduce costs but also align with global efforts to promote sustainable chemical manufacturing.

In terms of physical properties, 2-Ethylanthraquinone exhibits a high melting point and good solubility in organic solvents, which enhances its suitability for various industrial applications. Its thermal stability makes it ideal for use in high-temperature processes, such as polymerization reactions or thermal curing applications.

The demand for CAS No. 84-51-5-based products has grown significantly due to its versatility and adaptability across different industries. As researchers continue to uncover new applications and optimize existing processes, the future of 2-Ethylanthraquinone looks promising. Its role in advancing materials science, energy technology, and pharmaceuticals underscores its importance as a key compound in modern chemistry.

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