• 1. Synthesis and physicochemical, DFT, thermal and DNA-binding analysis of a new pentadentate N3S2 Schiff base ligand and its [CuN3S2]2+ complexes
  Ismail Warad,Hadeel Suboh,Nabil Al-Zaqri,Ali Alsalme,Fahad A. Alharthi,Meshari M. Aljohani,Abdelkader Zarrouk RSC Adv. 2020 10 21806
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• 3. Reasonable design of NIR AIEgens for fluorescence imaging and effective photothermal/photodynamic cancer therapy
  Hongsen Wang,Yu Wang,Zhaohui Zheng,Fang Yang,Xiaobin Ding,Aiguo Wu J. Mater. Chem. B 2022 10 1418
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  Ganesh Koyyada,Vinayak Botla,Suresh Thogiti,Guohua Wu,Jingzhe Li,Xiaqin Fang,Fantai Kong,Songyuan Dai,Niveditha Surukonti,Bhanuprakash Kotamarthi,Chandrasekharam Malapaka Dalton Trans. 2014 43 14992
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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Thiophenes 2,5-disubstituted thiophenes

Properties and Applications of 5-Bromothiophene-2-carbaldehyde (CAS No. 4701-17-1)

5-Bromothiophene-2-carbaldehyde, with the chemical formula C?H?BrOS, is a significant compound in the field of organic synthesis and pharmaceutical research. Its molecular structure combines a thiophene ring, a bromine substituent, and an aldehyde functional group, making it a versatile intermediate for various chemical transformations. This compound has garnered considerable attention due to its utility in synthesizing biologically active molecules, particularly in medicinal chemistry and materials science.

The thiophene core of 5-Bromothiophene-2-carbaldehyde is a heterocyclic aromatic ring that is widely recognized for its presence in numerous natural products and pharmaceuticals. The presence of the aldehyde group at the 2-position enhances its reactivity, allowing for further functionalization through condensation, oxidation, or reduction reactions. The bromine substituent at the 5-position introduces electrophilic characteristics, facilitating cross-coupling reactions such as Suzuki-Miyaura or Buchwald-Hartwig couplings, which are pivotal in constructing complex molecular architectures.

In recent years, 5-Bromothiophene-2-carbaldehyde has been extensively explored in the development of novel therapeutic agents. Its structural motif is frequently incorporated into drug candidates targeting various diseases, including cancer, infectious disorders, and neurological conditions. For instance, studies have demonstrated its role as a precursor in synthesizing small-molecule inhibitors that modulate enzyme activity by binding to specific protein targets. The aldehyde functionality allows for the formation of Schiff bases or imines, which can exhibit potent biological activity.

One notable application of 5-Bromothiophene-2-carbaldehyde is in the synthesis of thiophene-based polymers and organic semiconductors. The conjugated system of the thiophene ring contributes to electron delocalization, making it an attractive building block for materials with optoelectronic properties. Researchers have utilized this compound to develop organic light-emitting diodes (OLEDs), photovoltaic cells, and sensors. The bromine atom serves as a handle for further modifications via transition-metal-catalyzed reactions, enabling the creation of tailored materials with specific functionalities.

The compound's reactivity also makes it valuable in fragment-based drug design. Medicinal chemists often employ 5-Bromothiophene-2-carbaldehyde to generate libraries of derivatives through combinatorial chemistry or automated synthesis platforms. These libraries can then be screened for biological activity using high-throughput screening (HTS) techniques. The ability to introduce diverse substituents while retaining the core thiophene-aldehyde scaffold allows for rapid optimization of lead compounds.

Recent advancements in synthetic methodologies have further expanded the utility of 5-Bromothiophene-2-carbaldehyde. For example, transition-metal-catalyzed C-H activation has enabled direct functionalization of the thiophene ring without relying on pre-functionalized substrates. This approach has streamlined synthetic routes and reduced the number of synthetic steps required to obtain complex target molecules. Additionally, photoredox catalysis has been employed to achieve selective transformations under mild conditions, enhancing atom economy and reducing waste generation.

The pharmaceutical industry has also leveraged 5-Bromothiophene-2-carbaldehyde in the development of anti-inflammatory and antimicrobial agents. The thiophene scaffold is known to interact with biological targets such as enzymes and receptors, making it an ideal platform for drug discovery. Researchers have synthesized derivatives of this compound that exhibit inhibitory activity against enzymes involved in inflammatory pathways or microbial metabolic processes. Such findings highlight its potential as a pharmacological tool.

In conclusion, 5-Bromothiophene-2-carbaldehyde (CAS No. 4701-17-1) is a multifaceted compound with broad applications in synthetic chemistry and drug development. Its unique structural features—combining a thiophene ring with an aldehyde group and a bromine substituent—make it a valuable intermediate for constructing complex molecules in both academic research and industrial settings. As synthetic methodologies continue to evolve, the utility of this compound is expected to grow further, driving innovation in pharmaceuticals and materials science.

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