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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Thiophenes Thiophene carboxylic acids and derivatives Thiophene carboxamides

Introduction to 5-Ethylthiophene-2-carbohydrazide (CAS No. 676348-42-8)

5-Ethylthiophene-2-carbohydrazide, identified by the Chemical Abstracts Service Number (CAS No.) 676348-42-8, is a significant compound in the realm of pharmaceutical and chemical research. This heterocyclic hydrazide derivative has garnered attention due to its structural uniqueness and potential applications in medicinal chemistry. The compound features a thiophene core substituted with an ethyl group at the 5-position and a carbohydrazide moiety at the 2-position, making it a versatile scaffold for further chemical modifications and biological evaluations.

The thiophene ring is a key structural component found in numerous bioactive molecules, including drugs and natural products. Its aromaticity and ability to engage in various interactions with biological targets make it a preferred motif in drug design. The introduction of the ethyl group at the 5-position introduces additional conformational flexibility, which can influence the compound's solubility, metabolic stability, and binding affinity. The presence of the carbohydrazide functional group at the 2-position adds another layer of reactivity, enabling further derivatization through condensation reactions or participation in hydrogen bonding interactions.

In recent years, there has been a growing interest in developing novel hydrazide derivatives as pharmacological agents due to their broad spectrum of biological activities. Hydrazides are known to exhibit various pharmacological effects, including antitumor, anti-inflammatory, and antimicrobial properties. The 5-Ethylthiophene-2-carbohydrazide (CAS No. 676348-42-8) is being explored as a potential lead compound for further development in these areas. Its unique structure suggests that it may interact with biological targets in ways that differ from more conventional hydrazine-based compounds.

The synthesis of 5-Ethylthiophene-2-carbohydrazide involves multi-step organic transformations, starting from commercially available precursors such as ethylthiophene-2-carboxylic acid or its derivatives. The carboxylic acid group is typically converted into an acyl chloride or ester, which is then reacted with hydrazine hydrate to form the corresponding hydrazide. This reaction is often carried out under controlled conditions to ensure high yield and purity. The synthesis may also involve protective group strategies to prevent unwanted side reactions, highlighting the importance of meticulous planning in organic synthesis.

The 5-Ethylthiophene-2-carbohydrazide (CAS No. 676348-42-8) has been subjected to various spectroscopic and analytical techniques to confirm its identity and purity. Nuclear magnetic resonance (NMR) spectroscopy, including proton (1H) and carbon (13C) NMR, as well as two-dimensional NMR techniques like heteronuclear single quantum coherence (HSQC) and carbon-proton correlation spectroscopy (COSY), have been instrumental in elucidating its molecular structure. Mass spectrometry (MS) has also been used to confirm the molecular weight and fragmentation patterns consistent with the proposed structure.

Beyond structural elucidation, the 5-Ethylthiophene-2-carbohydrazide has been evaluated for its biological activity using both in vitro and in vivo models. In vitro studies have focused on assessing its interaction with various enzymes and receptors relevant to drug discovery. For instance, preliminary assays have examined its potential inhibitory effects on enzymes such as kinases or proteases, which are often implicated in disease pathways like cancer or inflammation. Additionally, cellular assays have been conducted to evaluate its cytotoxicity profile against various cancer cell lines.

In vivo studies have provided further insights into the pharmacological potential of 5-Ethylthiophene-2-carbohydrazide. Animal models have been used to assess its efficacy in reducing inflammation or tumor growth, depending on the specific disease context being studied. These studies often involve administering the compound orally or intraperitoneally and monitoring physiological parameters over time. The results from these studies can help determine whether further development is warranted and guide future optimization efforts.

The ethyl substituent at the 5-position of the thiophene ring plays a crucial role in modulating the biological activity of 5-Ethylthiophene-2-carbohydrazide. This group can influence both lipophilicity and electronic properties, which are critical factors in determining how a molecule interacts with biological targets. By varying the substitution pattern around the thiophene ring or introducing additional functional groups, researchers can fine-tune these properties to improve potency and selectivity.

The carbohydrazide moiety at the 2-position offers another avenue for structural diversification. This functional group can participate in hydrogen bonding interactions with polar residues in protein binding pockets or undergo condensation reactions with aldehydes or ketones to form Schiff bases or other derivatives. Such modifications can enhance binding affinity or introduce new pharmacological activities.

The exploration of 5-Ethylthiophene-2-carbohydrazide (CAS No. 676348-42-8) also aligns with broader trends in drug discovery towards sustainable and efficient synthetic methodologies. Green chemistry principles are being increasingly adopted to minimize waste and reduce environmental impact while maintaining high yields and purity standards. Techniques such as catalytic hydrogenation instead of traditional acid-base reactions or solvent-free conditions are being explored to achieve these goals.

In conclusion,5-Ethylthiophene-2-carbohydrazide represents a promising compound with significant potential for further development in pharmaceutical research. Its unique structural features make it an attractive scaffold for designing novel bioactive molecules targeting various diseases. Ongoing studies continue to uncover new aspects of its pharmacological activity while exploring innovative synthetic strategies that align with modern drug discovery principles.

• 2361-27-5(Thiophene-2-carbohydrazide)
• 14282-55-4(2,5-Thiophenedicarboxylic acid, dihydrazide)
• 685120-65-4(5-TERT-BUTYL-THIOPHENE-2-CARBOXAMIDE)
• 921596-58-9(2-Thiophenecarboxylic acid, 5-[(methylamino)carbonyl]-, hydrazide)
• 68257-89-6(5-Acetylthiophene-2-carboxamide)
• 88961-66-4(2-Thiophenecarboxamide, 5-(2-aminopropyl)-)
• 88961-65-3(2-Thiophenecarboxamide, 5-(2-aminoethyl)-)
• 402601-10-9(5-Ethylthiophene-2-carbohydrazide)
• 88961-62-0(2-Thiophenecarboxamide, 5-(3-aminopropyl)-)
• 126768-40-9(5-Methylthiophene-2-carbohydrazide)