5-Formylfuran-2-boronic acid (CAS 27329-70-0): A Comprehensive Introduction
5-Formylfuran-2-boronic acid (CAS 27329-70-0) is a significant organic compound that has gained considerable attention in the field of chemistry. This product is characterized by its unique chemical structure, which combines the formyl group and the boronic acid group on a furan ring. The presence of these functional groups endows 5-Formylfuran-2-boronic acid with distinct chemical properties and a wide range of potential applications.
Chemical Properties
5-Formylfuran-2-boronic acid has a molecular formula of C₅H₅BO₄. Its molecular weight is approximately 139.90 g/mol. The compound appears as a solid at room temperature, and its exact physical appearance may vary depending on factors such as purity and crystal form. In terms of solubility, it is sparingly soluble in water but shows better solubility in some organic solvents like ethanol, methanol, and dichloromethane. The boronic acid group in 5-Formylfuran-2-boronic acid is known for its ability to form reversible covalent bonds with diols and other molecules containing suitable functional groups. This property makes it a valuable reagent in various chemical reactions.
Synthesis and Preparation
There are several methods available for the synthesis of 5-Formylfuran-2-boronic acid. One common approach involves the reaction of 5-bromofurfural with a boronic acid ester in the presence of a palladium catalyst. The reaction typically takes place under an inert atmosphere, such as nitrogen or argon, to prevent oxidation of the reactants and products. The general reaction scheme is as follows:
5 - Bromofurfural + R₂BOR' (Boronic acid ester) + Pd catalyst → 5 - Formylfuran - 2 - boronic acid
In this reaction, the choice of boronic acid ester and palladium catalyst can significantly affect the reaction yield and selectivity. For example, pinacol boronate esters are often used due to their stability and commercial availability. The palladium catalyst, such as Pd(PPh₃)₄, facilitates the cross – coupling reaction between the bromine atom on 5 – bromofurfural and the boron atom on the boronic acid ester.
Another synthetic route involves the direct borylation of furfural. This method typically uses a borylating agent, such as bis(pinacolato)diboron, in the presence of a base and a palladium catalyst. The reaction conditions need to be carefully controlled to ensure high conversion and purity of the product. The reaction equation can be written as:
Furfural + B₂(pin)₂ (Bis(pinacolato)diboron) + Base + Pd catalyst → 5 - Formylfuran - 2 - boronic acid
The base used in this reaction can be an organic base, such as potassium carbonate or cesium carbonate. The reaction is usually carried out in an organic solvent, such as toluene or dioxane, at an elevated temperature.
Applications
5-Formylfuran-2-boronic acid has found numerous applications in different fields, including organic synthesis, medicinal chemistry, and materials science.
Organic Synthesis
In organic synthesis, 5-Formylfuran-2-boronic acid serves as a versatile building block. It can participate in various reactions, such as Suzuki – Miyaura cross – coupling reactions. In a typical Suzuki – Miyaura reaction, 5-Formylfuran-2-boronic acid reacts with an aryl or vinyl halide in the presence of a palladium catalyst and a base to form a new carbon – carbon bond. This reaction is widely used for the construction of complex organic molecules, such as biaryls and heterobiaryls. The general reaction scheme is:
5 - Formylfuran - 2 - boronic acid + R - X (Aryl or vinyl halide) + Pd catalyst + Base → Coupled product
The products of these reactions can be further modified to synthesize a wide range of organic compounds, including pharmaceuticals, agrochemicals, and functional materials.
Medicinal Chemistry
In medicinal chemistry, 5-Formylfuran-2-boronic acid has shown potential as a starting material for the synthesis of bioactive compounds. The formyl group can be used for the introduction of various functional groups through condensation reactions, such as Schiff base formation. Schiff bases derived from 5-Formylfuran-2-boronic acid have been investigated for their antibacterial, antifungal, and anticancer activities. For example, some Schiff bases have been found to inhibit the growth of certain cancer cell lines by interfering with specific cellular pathways.
Materials Science
In materials science, 5-Formylfuran-2-boronic acid can be used in the preparation of functional polymers and materials. The boronic acid group can form cross – links with polymers containing diol groups, leading to the formation of hydrogels and other functional materials. These materials have potential applications in drug delivery, tissue engineering, and sensors. For instance, hydrogels based on 5-Formylfuran-2-boronic acid can be designed to respond to changes in the environment, such as pH or the presence of specific analytes.
Safety and Handling
When handling 5-Formylfuran-2-boronic acid, appropriate safety precautions should be taken. The compound may be irritating to the skin, eyes, and respiratory tract. It is recommended to wear protective gloves, goggles, and a lab coat when working with this compound. In case of contact with the skin or eyes, immediately rinse with plenty of water and seek medical attention if necessary. The compound should be stored in a cool, dry place away from sources of heat and ignition. It should also be kept away from strong oxidizing agents and bases to prevent potential chemical reactions.
Conclusion
5-Formylfuran-2-boronic acid (CAS 27329-70-0) is a highly valuable organic compound with unique chemical properties and a wide range of applications. Its use in organic synthesis, medicinal chemistry, and materials science has opened up new possibilities for the development of novel compounds and materials. As research in these fields continues to advance, the importance of 5-Formylfuran-2-boronic acid is likely to increase. If you are interested in purchasing 5-Formylfuran-2-boronic acid or have any related inquiries, please click the following button:
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