Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate (CAS 571189-16-7): A Comprehensive Introduction
Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate, with the CAS number 571189-16-7, is a significant chemical compound in the field of organic chemistry. This compound has drawn considerable attention due to its unique chemical structure and a wide range of potential applications. In this article, we will explore in detail its chemical properties, various uses, applications in different fields, and the methods of its preparation.
Chemical Properties
Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate is an organic compound with a complex molecular structure. Its molecular formula is C₁₅H₂₀N₄O₄, and it has a molecular weight of approximately 320.34 g/mol. The compound contains a piperazine ring, which is a six – membered heterocyclic ring with two nitrogen atoms at opposite positions. The presence of the tert – butyl group and the nitropyridinyl group adds to its chemical stability and reactivity characteristics.
The physical state of Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate is typically a solid at room temperature. It has a certain solubility in common organic solvents such as dichloromethane, chloroform, and dimethyl sulfoxide (DMSO). However, its solubility in water is relatively low, which is mainly due to the hydrophobic nature of the tert – butyl group and the non – polar parts of the molecule.
From a chemical reactivity perspective, the nitropyridinyl group is an electron – withdrawing group, which can affect the electron density distribution in the molecule and make the adjacent atoms more prone to certain chemical reactions. The piperazine ring can undergo various substitution and addition reactions, depending on the reaction conditions and the reagents used.
Uses
Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate has multiple uses in the field of chemical research and industry. One of the primary uses is as an intermediate in the synthesis of more complex organic compounds. Due to its unique structure, it can serve as a building block for the construction of various bioactive molecules.
In the pharmaceutical industry, it can be used in the development of new drugs. The presence of the piperazine ring and the nitropyridinyl group may confer certain biological activities to the final products. For example, compounds containing piperazine rings are often found to have activities related to the central nervous system, such as anti – depressant and anti – psychotic effects. The nitropyridinyl group can also play a role in interacting with biological targets, potentially leading to the discovery of new drugs with novel mechanisms of action.
In the field of materials science, Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate can be used in the synthesis of functional polymers. By incorporating this compound into polymer chains, the resulting polymers may exhibit unique electrical, optical, or mechanical properties. For instance, the electron – withdrawing nitropyridinyl group can affect the charge transport properties of the polymer, making it potentially useful in the development of organic electronic devices.
Applications in Different Fields
Pharmaceutical Field
In drug discovery, Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate can be used in lead optimization. Medicinal chemists can modify the structure of this compound by introducing different functional groups to improve its pharmacological properties, such as solubility, bioavailability, and selectivity towards specific biological targets. For example, by replacing the tert – butyl group with other alkyl or aryl groups, the lipophilicity of the compound can be adjusted, which may affect its ability to cross cell membranes.
It can also be used in the synthesis of prodrugs. Prodrugs are inactive forms of drugs that are converted into active forms in the body. By attaching appropriate functional groups to Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate, prodrugs with improved pharmacokinetic properties can be designed. For instance, a prodrug may have better stability in the gastrointestinal tract, allowing for more efficient oral administration.
Materials Science Field
In the development of organic semiconductors, Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate can be used as a monomer or a dopant. When used as a monomer, it can be polymerized with other monomers to form conjugated polymers. The presence of the nitropyridinyl group can introduce electron – accepting properties to the polymer, which is beneficial for the construction of n – type organic semiconductors. As a dopant, it can modify the electronic properties of existing polymers, such as adjusting the carrier concentration and mobility.
In the field of liquid crystals, this compound can be incorporated into liquid crystal molecules to modify their physical properties. For example, it can affect the phase transition temperature, the alignment behavior, and the optical properties of liquid crystals. This can be useful in the development of advanced display technologies, such as high – resolution liquid crystal displays (LCDs) and flexible displays.
Agrochemical Field
In the development of agrochemicals, Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate can be used as a starting material for the synthesis of pesticides and herbicides. The unique chemical structure may endow the final products with specific biological activities against pests or weeds. For example, it may interfere with the metabolic pathways of pests, leading to their death or growth inhibition.
Preparation Methods
Classical Organic Synthesis Method
The classical synthesis of Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate usually involves a multi – step reaction sequence. One common approach starts with the reaction of 6 – nitropyridin – 3 – amine with piperazine. This reaction typically occurs in the presence of a suitable solvent, such as ethanol or acetonitrile, and a catalyst, such as a base like potassium carbonate. The reaction between the amine group of 6 – nitropyridin – 3 – amine and the nitrogen atom of piperazine forms a new carbon – nitrogen bond.
After the formation of the intermediate, the next step is the introduction of the tert – butyl carboxylate group. This can be achieved by reacting the intermediate with di – tert – butyl dicarbonate (Boc₂O) in the presence of a base, such as triethylamine. The reaction conditions, including temperature, reaction time, and the molar ratio of reactants, need to be carefully controlled to ensure high yield and purity of the final product.
Modern Synthetic Approaches
With the development of modern organic synthesis techniques, some new methods have been explored for the preparation of Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate. One such approach is the use of transition – metal – catalyzed reactions. For example, palladium – catalyzed coupling reactions can be used to directly connect the nitropyridinyl group and the piperazine ring in a more efficient and selective manner. This method can reduce the number of reaction steps and improve the overall yield of the synthesis.
Another modern approach is the use of microwave – assisted synthesis. Microwave irradiation can significantly accelerate the reaction rate by providing rapid and uniform heating. This can reduce the reaction time from hours or days in traditional methods to minutes, which is beneficial for large – scale production.
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