Cyclopentyl methyl ether (CAS 5614-37-9) is a colorless liquid with a pleasant odor. It has a molecular formula of C₆H₁₂O and a molecular weight of 100.16 g/mol. This compound is known for its relatively high boiling point (106 - 107 °C) and low freezing point (-145 °C), which makes it a useful solvent in various chemical processes. It is slightly soluble in water but miscible with many organic solvents. The density of cyclopentyl methyl ether is approximately 0.86 g/cm³ at 20 °C. It has a flash point of 11 °C, so proper safety measures should be taken when handling it.
Cyclopentyl methyl ether has a wide range of applications in the chemical and pharmaceutical industries. One of its primary uses is as a reaction solvent. Its high boiling point and low freezing point make it suitable for reactions that require a wide temperature range. It can dissolve a variety of organic compounds, including polar and non - polar substances, which makes it a versatile solvent for many types of chemical reactions. In addition, it is used in extraction processes. It can effectively extract organic compounds from aqueous solutions, and its low solubility in water makes it easy to separate from the aqueous phase. In the pharmaceutical industry, it is often used in the synthesis of drugs and active pharmaceutical ingredients (APIs) due to its low toxicity and good solubility properties.
When using cyclopentyl methyl ether as a solvent in a chemical reaction, first, ensure that the reaction vessel is clean and dry. Then, measure the appropriate amount of cyclopentyl methyl ether according to the reaction requirements. Add the reactants to the solvent slowly while stirring to ensure uniform mixing. Control the reaction temperature within the appropriate range for the specific reaction. After the reaction is complete, the product can be separated from the solvent by distillation or other separation methods. When using it for extraction, add the cyclopentyl methyl ether to the aqueous solution containing the target compound. Stir the mixture well to allow the target compound to transfer from the aqueous phase to the organic phase. Then, separate the organic and aqueous phases using a separatory funnel. Repeat the extraction process if necessary to improve the extraction efficiency.
Caso 1: Síntese química num laboratório de investigação
A research group was working on the synthesis of a new organic compound. They chose cyclopentyl methyl ether as the reaction solvent because of its ability to dissolve both the starting materials and the intermediate products. The reaction was carried out at a relatively high temperature (around 80 °C) for several hours. The use of cyclopentyl methyl ether allowed for a homogeneous reaction mixture, which led to a high - yield synthesis of the target compound. After the reaction, the product was easily separated from the solvent by distillation, and the purity of the product was high.
Case 2: Pharmaceutical API Extraction
A pharmaceutical company was extracting an active pharmaceutical ingredient from a fermentation broth. Cyclopentyl methyl ether was used as the extraction solvent. The fermentation broth was mixed with cyclopentyl methyl ether in a large - scale extraction tank. After stirring for a sufficient time, the two phases were separated. The organic phase containing the API was further purified by distillation and crystallization. The use of cyclopentyl methyl ether resulted in a high - recovery rate of the API and reduced the amount of impurities in the final product.
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