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  Hamid Heydari,Mohammad B. Gholivand New J. Chem., 2017,41, 237-244
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  Li-Hua Gan,Rui Wu,Jian-Lei Tian,Patrick W. Fowler Phys. Chem. Chem. Phys., 2017,19, 419-425
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• Solvents and Organic Chemicals Organic Compounds Organic nitrogen compounds Organonitrogen compounds Amines Secondary amines

N-ethylprop-2-yn-1-amine (CAS No. 6943-44-8): An Overview of Its Properties, Applications, and Recent Research

N-ethylprop-2-yn-1-amine (CAS No. 6943-44-8) is a versatile organic compound with a unique chemical structure that has garnered significant attention in various scientific and industrial applications. This compound, also known as N-ethylacetyleneamine, is characterized by its ethyl and propargyl functional groups, which confer it with distinct chemical properties and reactivity profiles. In this comprehensive overview, we will delve into the physical and chemical properties of N-ethylprop-2-yn-1-amine, its synthesis methods, applications in pharmaceuticals and materials science, and the latest research findings that highlight its potential.

The molecular formula of N-ethylprop-2-yn-1-amine is C₅H₉N, and it has a molecular weight of approximately 83.13 g/mol. The compound is a colorless liquid at room temperature with a boiling point of around 75°C. Its low boiling point makes it suitable for various synthetic processes where temperature control is crucial. Additionally, N-ethylprop-2-yn-1-amine exhibits good solubility in common organic solvents such as ethanol, acetone, and dichloromethane, which facilitates its use in laboratory and industrial settings.

In terms of chemical reactivity, N-ethylprop-2-yn-1-amine is highly reactive due to the presence of the terminal alkyne group and the amine functionality. The alkyne group can undergo a variety of reactions, including hydrogenation to form alkenes or alkanes, halogenation to introduce halogen atoms, and metal-catalyzed coupling reactions such as the Sonogashira coupling. The amine group can participate in nucleophilic addition reactions, acylation to form amides, and condensation reactions to form imines or Schiff bases. These diverse reactivity profiles make N-ethylprop-2-yn-1-amine an attractive starting material for the synthesis of complex organic molecules.

The synthesis of N-ethylprop-2-yn-1-amine can be achieved through several routes. One common method involves the reaction of propargyl chloride with ethylamine in the presence of a base such as sodium hydroxide or potassium carbonate. This reaction proceeds via nucleophilic substitution to form the desired product. Another approach involves the reaction of propargyl bromide with ethylamine under similar conditions. Both methods are well-established and have been extensively studied in the literature.

In the pharmaceutical industry, N-ethylprop-2-yln-lamine has shown promise as an intermediate in the synthesis of various bioactive compounds. For instance, it can be used to synthesize certain antiviral agents and anticancer drugs that contain alkynyl functionalities. Recent research has also explored its potential as a building block for the development of novel drug delivery systems. For example, a study published in the Journal of Medicinal Chemistry reported the use of N-Ethylpropargylamine-based prodrugs to enhance the solubility and bioavailability of poorly soluble drugs.

Beyond pharmaceuticals, N-Ethylpropargylamine has found applications in materials science and polymer chemistry. Its ability to undergo click chemistry reactions makes it a valuable monomer for the synthesis of functional polymers with tailored properties. Click chemistry reactions, such as the copper-catalyzed azide–alkyne cycloaddition (CuAAC), are known for their high efficiency and selectivity under mild conditions. This has led to the development of novel materials with applications in areas such as tissue engineering, drug delivery, and coatings.

Recent advancements in computational chemistry have also contributed to our understanding of N-Ethylpropargylamine. Quantum mechanical calculations have provided insights into its electronic structure and reactivity patterns, which can guide experimental efforts in optimizing synthetic routes and identifying new applications. For example, density functional theory (DFT) studies have revealed that the presence of electron-donating groups on the amine functionality can enhance its nucleophilicity, making it more reactive towards electrophiles.

In conclusion, N-Ethylpropargylamine (CAS No. 6943-44-8) is a multifaceted compound with a wide range of applications in pharmaceuticals, materials science, and polymer chemistry. Its unique chemical structure endows it with diverse reactivity profiles that make it an attractive starting material for synthetic processes. Ongoing research continues to uncover new possibilities for this compound, highlighting its potential to contribute to various scientific and industrial advancements.

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