• 1. Metal free TBHP-promoted intramolecular carbonylation of arenes via radical cross-dehydrogenative coupling: synthesis of indenoquinolinones, 4-azafluorenones and fluorenones
  Kalpana Mishra,Ashok Kumar Pandey,Jay Bahadur Singh,Radhey M. Singh Org. Biomol. Chem. 2016 14 6328

• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Pyridines and derivatives Phenylpyridines

3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl-

3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl- (CAS No. 176433-57-1) is a highly specialized organic compound with significant applications in various fields of chemistry. This compound is characterized by its unique structure, which combines a pyridine ring with a chloro substituent at the 2-position and a phenyl group at the 5-position, along with a carboxaldehyde functional group at the 3-position. The combination of these substituents imparts distinctive chemical and physical properties to the molecule, making it an intriguing subject for research and industrial applications.

The pyridine ring in 3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl- serves as a versatile platform for further chemical modifications. The presence of the carboxaldehyde group at the 3-position introduces reactivity that can be exploited in various synthetic pathways. Recent studies have highlighted its potential as an intermediate in the synthesis of bioactive compounds, particularly in the development of novel pharmaceutical agents. The chloro substituent at the 2-position enhances the compound's stability and selectivity in certain reactions, while the phenyl group at the 5-position contributes to its aromaticity and electronic properties.

One of the most notable aspects of 3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl- is its role in heterocyclic chemistry. Researchers have demonstrated that this compound can be effectively utilized in the construction of complex heterocyclic frameworks, which are essential components of many bioactive molecules. For instance, recent advancements in palladium-catalyzed cross-coupling reactions have enabled the seamless integration of this compound into larger molecular architectures. These findings underscore its importance as a building block in modern organic synthesis.

The synthesis of 3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl- involves a multi-step process that typically begins with chlorination of a pyridine derivative followed by alkylation or arylation to introduce the phenyl group. The final step involves oxidation to install the carboxaldehyde functionality. Optimization of these steps has been a focus of recent research efforts, with particular emphasis on improving yields and reducing reaction times. Novel catalytic systems and green chemistry approaches have been employed to enhance the sustainability of the synthesis process.

In terms of applications, 3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl- has shown promise in materials science as well. Its ability to form stable coordination complexes with transition metals has led to its use in catalysis and metalloorganic frameworks (MOFs). Recent studies have explored its potential as a ligand in enantioselective catalysis, where it has demonstrated high enantioselectivity in certain asymmetric reactions. This property makes it a valuable tool in the development of chiral catalysts for industrial processes.

Another area where 3-Pyridinecarboxaldehyde, 2-chloro-5-phenyl-* has garnered significant attention is in medicinal chemistry. Its structural features make it an ideal candidate for drug design, particularly in targeting specific biological pathways. For example, researchers have investigated its potential as an inhibitor of key enzymes involved in neurodegenerative diseases such as Alzheimer's disease. Preliminary results indicate that this compound exhibits moderate inhibitory activity against these enzymes, suggesting further exploration is warranted.

The electronic properties of 3-Pyridinecarboxaldehyde, 2-chloro-5-* phenyl-* also make it an interesting candidate for optoelectronic applications. Its conjugated system allows for efficient charge transport and absorption properties that are desirable in materials used for light-emitting diodes (LEDs) and photovoltaic devices. Recent computational studies have provided insights into its electronic structure and excited-state dynamics, paving the way for its use in next-generation optoelectronic materials.

In conclusion, 3-Pyridinecarboxaldehyde, 2-chloro-*5*-phenyl-* (CAS No. 176433-*57*-1) is a multifaceted compound with diverse applications across various domains of chemistry. Its unique structure and reactivity make it an invaluable tool for researchers and industry professionals alike. As ongoing research continues to uncover new synthetic routes and functional applications for this compound, its significance within the chemical community is expected to grow further.

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