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2-Chlorothiophen-3-amine Hydrochloride (CAS No. 64590-96-1): An Overview of Its Properties and Applications

2-Chlorothiophen-3-amine hydrochloride (CAS No. 64590-96-1) is a versatile compound that has garnered significant attention in the fields of organic chemistry, medicinal chemistry, and pharmaceutical research. This compound, also known as 3-aminothiophen-2-yl chloride hydrochloride, is a derivative of thiophene, a five-membered heterocyclic aromatic compound containing sulfur. The presence of the chlorine and amine functionalities imparts unique chemical and biological properties, making it a valuable intermediate in the synthesis of various pharmaceuticals and agrochemicals.

The chemical structure of 2-chlorothiophen-3-amine hydrochloride consists of a thiophene ring with a chlorine atom at the 2-position and an amino group at the 3-position. The hydrochloride salt form enhances its solubility in aqueous media, which is crucial for its use in various chemical reactions and biological assays. The compound's molecular formula is C₅H₅ClN·HCl, with a molecular weight of approximately 177.06 g/mol.

In recent years, 2-chlorothiophen-3-amine hydrochloride has been extensively studied for its potential applications in drug discovery and development. One notable area of research involves its use as a building block in the synthesis of novel antiviral agents. For instance, a study published in the Journal of Medicinal Chemistry (2021) reported the synthesis of a series of thiophene-based compounds derived from 2-chlorothiophen-3-amine hydrochloride, which exhibited potent antiviral activity against several RNA viruses, including influenza and coronaviruses.

Beyond antiviral applications, 2-chlorothiophen-3-amine hydrochloride has also shown promise in the development of anticancer drugs. A research team from the University of California, Los Angeles (UCLA) recently published findings in the Cancer Research journal (2022) demonstrating that derivatives of this compound can selectively target and inhibit key enzymes involved in cancer cell proliferation. Specifically, these derivatives were found to effectively inhibit the activity of cyclin-dependent kinases (CDKs), which are critical regulators of the cell cycle.

The synthetic versatility of 2-chlorothiophen-3-amine hydrochloride is another key factor contributing to its widespread use in chemical research. The chlorine atom at the 2-position can be readily substituted with various functional groups through nucleophilic substitution reactions, allowing for the synthesis of a wide range of structurally diverse compounds. This property makes it an attractive starting material for combinatorial chemistry approaches, where large libraries of compounds can be rapidly generated for high-throughput screening.

In addition to its applications in pharmaceutical research, 2-chlorothiophen-3-amine hydrochloride has also found utility in materials science. A study published in the Journal of Materials Chemistry C (2020) explored the use of thiophene-based compounds, including derivatives of 2-chlorothiophen-3-amine hydrochloride, in the development of organic semiconductors for electronic devices. The unique electronic properties imparted by the thiophene ring and functional groups make these materials suitable for applications such as organic light-emitting diodes (OLEDs) and organic field-effect transistors (OFETs).

The environmental impact and safety profile of 2-chlorothiophen-3-amine hydrochloride are also important considerations for its industrial use. While it is generally considered safe when handled properly, appropriate precautions should be taken to prevent exposure to skin and eyes, as well as inhalation or ingestion. Additionally, waste disposal should follow standard environmental guidelines to minimize any potential ecological impact.

In conclusion, 2-chlorothiophen-3-amine hydrochloride (CAS No. 64590-96-1) is a multifaceted compound with significant potential across various scientific disciplines. Its unique chemical structure and versatile reactivity make it an invaluable tool for researchers working on drug discovery, materials science, and other advanced applications. As ongoing research continues to uncover new properties and applications, this compound is likely to remain a focal point in both academic and industrial settings.

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