6-Aminoquinoxaline CAS 6298-37-9

It is an effective drug for the treatment of rheumatoid arthritis. Rheumatoid arthritis is an autoimmune disease that causes inflammation and pain as the immune system attacks joint tissue. In several studies, it has been shown to reduce symptoms and condition in people with arthritis, and can suppress abnormal responses of the immune system, thereby reducing inflammation and pain.

It is also widely used in the manufacture of dyes and paints. Due to its good coloring properties and chemical stability, it can be used as a precursor of dyes and coatings. For example, it can react with acid dyes or direct dyes to produce dyes of various colors, which are widely used in the fields of textiles, leather and paper. In addition, it can also be used to make amino-containing polymers, which can be used as film formers and adhesives in coatings.

It can also be used as a chemical reagent, for example, in biochemical experiments, molecular biology experiments and organic synthesis reactions. For example, in some basic experiments, it can be used to prepare fluorescent molecular probes for biomolecular detection, imaging and quantitative analysis. In addition, it can also be used to synthesize biologically active compounds, such as pharmaceutical compounds, pesticides, etc.

In recent years, as an organic semiconductor material with good optoelectronic properties, has been widely studied and applied in the field of optoelectronic device manufacturing. For example, combining product with other optoelectronic materials can create highly efficient organic solar cells, graphene optical sensors, and more.

Glaucoma, as the second most common cause of blindness worldwide, is primarily treated by reducing intraocular pressure. Brimonidine Tartrate, as a selective ₂ - adrenergic receptor agonist, has become a first-line therapeutic drug by reducing aqueous humor production and increasing aqueous outflow from the scleral uveal channel.

6-aminoquinoxaline by introducing bromine atoms at position 5 through bromination reaction, followed by multiple substitution reactions.

Bromination reaction: 6-Aminoquinoxalin reacts with CuBr ₂ in hydrobromic acid aqueous solution, with a yield of 97.8% and a product purity of 99.94%.

Cyclization reaction: constructing a nitrogen-containing heterocyclic skeleton through the condensation of sodium bisulfite and glyoxal.
Substitution reaction: Acylation is carried out using thiophosgene, and then reacted with ethylenediamine to form the target molecular structure.

Compared with traditional methods, this route has the advantages of mild reaction conditions (90-100 ℃), simple operation (atmospheric pressure reaction), and convenient post-treatment (extraction and purification), making it suitable for industrial production.

The rigid planar structure of quinoxaline ring endows it with excellent fluorescence properties, and the presence of amino groups can provide reaction sites for introducing chromophores or chromophores. Functional dyes with specific absorption/emission wavelengths can be prepared through diazotization coupling reaction.

Fluorescent probe: Developing probes for metal ion detection (such as Cu ² ⁺, Zn ² ⁺) or biomolecule labeling using the fluorescence properties of quinoxaline ring.

Thermistor dye: an intelligent dye designed to change color with temperature by introducing long-chain alkane groups, applied to thermosensitive recording materials.

A research team synthesized a novel fluorescent dye by coupling 6-aminoquinoxalin with 1-naphthylamine after diazotization. The dye emits 550nm green light under 450nm excitation, with a quantum yield of 68%, and has been successfully used in cell imaging experiments.

The conjugation effect between amino groups and quinoxaline rings allows them to be introduced as side groups in polymer chains, improving the thermal stability, mechanical strength, and optoelectronic properties of the material.

Polyimide Enhancement: Grafting 6-Aminoquinoxalin onto the polyimide backbone increases the glass transition temperature (Tg) from 320 ℃ to 365 ℃, while increasing the tensile strength by 40%.

Conductive composite materials: Composite materials are prepared by blending with graphene, where amino groups form hydrogen bonds with oxygen-containing groups on the surface of graphene, resulting in a conductivity increase of 2 orders of magnitude compared to pure graphene.

A domestic polymer material enterprise has established a ton level production line, and its products are mainly used in radiation resistant coatings for aerospace and flexible display substrate materials.

The hydrophobicity of quinoxaline ring and the hydrophilicity of amino group form a unique molecular polarity, making it easy to penetrate biological membranes and bind to target proteins. Research has shown that derivatives of 6-aminoquinoxalin have inhibitory effects on fungal mitochondrial respiratory chain complex III.

Fungicide: A compound with a control effect of 85% against cucumber downy mildew was synthesized by introducing trifluoromethyl and sulfonyl groups.
Insecticides: Splicing with pyrethroid structures to obtain dual efficacy insecticides that have both contact killing and stomach toxicity effects.

The annual growth rate of the global pesticide market is about 4.2%, and it is expected that the application in this field will drive an 8-10% increase in demand for 6-aminoquinoxalin.

The π - conjugated system of quinoxaline ring endows it with excellent charge transfer ability, and the electron donating effect of amino group can regulate the highest occupied molecular orbital (HOMO) energy level.

Organic field-effect transistor (OFET): As an active layer material, the mobility can reach 0.12 cm ²/Vs, and the threshold voltage is below -2V.
Organic light-emitting diode (OLED): As a hole transport layer, the device has a brightness of up to 10000 cd/m ² and a lifespan of over 5000 hours.

A research team in South Korea has increased the electron mobility to 0.38 cm ²/Vs by introducing cyanide substituents, providing a new direction for the development of high-performance n-type organic semiconductor materials.