• 1. Alternative mixtures to R-600a. Theoretical assessment and experimental energy evaluation of binary mixtures in a commercial cooler: Mélanges alternatifs au R-600a. évaluation théorique et évaluation énergétique expérimentale de mélanges binaires dans un refroidisseur commercial.
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• 2. An atlas of endohedral Sc2S cluster fullerenes?
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• 3. An amphoteric reactivity of a mixed-valent bis(μ-oxo)dimanganese(iii,iv) complex acting as an electrophile and a nucleophile?
  Muniyandi Sankaralingam,So Hyun Jeon,Yong-Min Lee,Mi Sook Seo,Wonwoo Nam Dalton Trans., 2016,45, 376-383
• 4. An amorphous Cu–In–S nanoparticle-based precursor ink with improved atom economy for CuInSe2 solar cells with 10.85% efficiency?
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• 5. An intermolecular C–H oxidizing strategy to access highly fused carbazole skeletons from simple naphthylamines?
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6-Ethyl-2,3-dihydro-1H-inden-1-one (CAS No. 42348-88-9): A Versatile Chemical Intermediate for Modern Applications

6-Ethyl-2,3-dihydro-1H-inden-1-one (CAS No. 42348-88-9) is a specialized organic compound belonging to the indanone class, which has gained significant attention in pharmaceutical and fragrance research. This ketone derivative features a unique bicyclic structure with an ethyl substituent at the 6-position, making it a valuable building block for various synthetic applications. The compound's molecular formula is C₁₁H₁₂O, with a molecular weight of 160.21 g/mol, and it typically appears as a pale yellow to colorless crystalline solid at room temperature.

Recent trends in green chemistry have highlighted the importance of 6-ethyl indanone as a precursor for sustainable synthesis routes. Researchers are particularly interested in its potential for creating bioactive molecules with reduced environmental impact. The compound's stability and reactivity profile make it suitable for various catalytic transformations, including asymmetric hydrogenation and cross-coupling reactions, which are hot topics in current organic chemistry research.

The pharmaceutical industry has shown growing interest in 6-Ethyl-2,3-dihydro-1H-inden-1-one due to its structural similarity to several pharmacophores. It serves as a key intermediate in the synthesis of potential central nervous system (CNS) agents, with researchers exploring its derivatives for neurological applications. The compound's rigid bicyclic framework provides an excellent scaffold for designing molecules with specific three-dimensional characteristics, a property highly valued in modern drug discovery programs.

In the fragrance industry, 6-ethyl indan-1-one derivatives are valued for their musk-like olfactory properties. Perfumers utilize modified versions of this compound to create long-lasting, sophisticated scent profiles. The current market trend toward sustainable fragrances has increased demand for such versatile intermediates that can be derived from renewable resources while maintaining high performance characteristics.

The synthesis of 6-Ethyl-2,3-dihydro-1H-inden-1-one typically involves Friedel-Crafts acylation followed by selective reduction steps. Recent advancements have focused on developing more efficient catalytic systems for its production, addressing common search queries about "green synthesis of indanone derivatives" and "catalytic routes to ethyl-substituted ketones". These improvements aim to reduce energy consumption and minimize waste generation, aligning with the principles of green chemistry.

Analytical characterization of CAS 42348-88-9 typically includes GC-MS, HPLC, and NMR techniques. The compound shows characteristic signals in ¹H NMR (δ 7.2-7.4 ppm for aromatic protons, δ 2.8-3.2 ppm for methylene protons adjacent to the carbonyl, and δ 1.2-1.4 ppm for the ethyl methyl group), which are frequently referenced in analytical chemistry discussions about "indanone spectral analysis". These spectral features help researchers identify and quantify the compound in complex mixtures.

Market analysis indicates steady growth in demand for 6-Ethyl-2,3-dihydro-1H-inden-1-one, particularly from the Asia-Pacific region where pharmaceutical and fragrance industries are expanding rapidly. Current pricing trends reflect its status as a specialty chemical, with purity grades ranging from 95% to 99% available for different application needs. Industry reports often highlight its position in the "fine chemicals market" and "pharmaceutical intermediates sector".

Storage and handling of 6-ethyl indanone require standard organic chemical precautions. It should be kept in tightly sealed containers under inert atmosphere to prevent oxidation, a common question in "indanone storage conditions" searches. The compound demonstrates good stability under normal laboratory conditions but may gradually degrade upon prolonged exposure to air or light.

Future research directions for 6-Ethyl-2,3-dihydro-1H-inden-1-one include exploring its potential in material science applications, particularly as a precursor for organic electronic materials. Its conjugated system and ability to form stable radicals make it interesting for "organic semiconductor" development, a rapidly growing field in materials chemistry. Additionally, biotechnological approaches to produce indanone derivatives through microbial fermentation are being investigated as sustainable alternatives to traditional synthesis methods.

Quality control specifications for CAS 42348-88-9 typically include parameters such as melting point range (reported between 35-38°C), purity by GC analysis (>98%), and residual solvent content. These specifications are crucial for pharmaceutical applications where consistency and reproducibility are paramount, addressing common industry concerns about "chemical intermediate quality standards".

The environmental profile of 6-Ethyl-2,3-dihydro-1H-inden-1-one has been evaluated through standard ecotoxicity tests, showing moderate biodegradability under aerobic conditions. This information is particularly relevant for formulators seeking "environmentally friendly chemical intermediates" and aligns with increasing regulatory focus on green chemistry principles throughout the chemical industry.

In conclusion, 6-Ethyl-2,3-dihydro-1H-inden-1-one (CAS No. 42348-88-9) represents a versatile and valuable chemical intermediate with diverse applications across multiple industries. Its unique structural features, synthetic utility, and potential for sustainable production methods position it as an important compound in modern organic chemistry. As research continues to uncover new applications and improved synthetic routes, this indanone derivative is likely to maintain its significance in both academic and industrial settings.

• 83-33-0(2,3-dihydro-1H-inden-1-one)
• 24623-20-9(6-Methyl-1-indanone)
• 4600-82-2(5-Ethyl-2,3-dihydro-1H-inden-1-one)
• 39627-61-7(7-Methyl-1-indanone)
• 30286-23-8(Indenone, dihydro-)
• 4593-38-8(5-Methyl-1-indanone)
• 24644-78-8(4-Methyl-2,3-dihydro-1H-inden-1-one)
• 606-23-5(1,3-Indandione)
• 10036-02-9(1-Indanone-2,2-d2)
• 16440-97-4(5,6-Dimethyl-2,3-dihydro-1H-inden-1-one)