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3-Methyl-1-butanethiol is an organic compound with the chemical formula C5H12S, CAS 541-31-1, and a relative molecular weight of 104.21. It is a thiol, an alcohol with sulfur atoms connected to the carbon chain, also known as isopentanol. It is a colorless to light yellow liquid. It has a special pungent odor, similar to the odor of garlic or onions. This compound is usually flammable. The solubility in water is low, but it can dissolve in many organic solvents. It is soluble in organic solvents such as ethanol, ether, and benzene. Has a strong pungent odor, similar to the odor of garlic or onions. Its odor sensitivity is high and can be perceived even at extremely low concentrations. It is widely used as an additive in the food and spice industry, giving products a unique taste and aroma. In addition, it is also used as an organic synthesis reagent and a pharmaceutical intermediate.
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C.F |
C5H12S |
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E.M |
104 |
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M.W |
104 |
|
m/z |
104 (100.0%), 105 (5.4%), 106 (4.5%) |
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E.A |
C, 57.63; H, 11.61; S, 30.76 |
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3 Methyl-1-butanethiol is an organic compound containing thiol groups, which has special odors and reaction properties and is widely used in fields such as organic synthesis, chemical industry, and agriculture. The following are several main uses of 3-Methyl-1-butanethiol:
1. Synthetic spices:
3 Methyl-1-butanethiol can be used to synthesize various spices, such as coumarin, coumarin, and camphor. These spices can be used in daily chemical products, cosmetics, perfume and other fields to provide fresh and fragrant smell.
2. Synthetic surfactants: 3 Methyl-1-butanethiol can be used to synthesize various surfactants, such as sulfopropionate and sulfate salts. These surfactants can be used in fields such as detergents, wetting agents, emulsifiers, etc. to enhance washing efficiency and improve surface performance.
3. Synthetic pesticides: 3 Methyl-1-butanethiol can be used to synthesize various pesticides, such as fungicides, herbicides, and insecticides. These pesticides can be used in fields such as agriculture, forestry, and health to prevent diseases and pests, increase crop yields, and improve hygiene.
4. Synthetic biodegradable agents:
3 Methyl-1-butanethiol can be used to synthesize various biodegradable agents, such as aliphatic alcohols and esters. These biodegradable agents can be used to solve environmental pollution and degrade organic waste, promoting sustainable development.
5. Synthetic aliphatic ester biodegradants: 3 Methyl-1-butanethiol can react with various aliphatic alcohols, acids, and other raw materials to synthesize a series of aliphatic ester biodegradants. These biodegradable agents can decompose into carbon dioxide and water in specific environments, exhibiting good biodegradability and environmental friendliness. For example, lactic acid ester biodegradable agents synthesized from 3 Methyl-1-butanethiol and lactic acid can be rapidly hydrolyzed at room temperature and pressure, producing carbon dioxide and water without any harmful substances. In addition, biodegradable esters, amides, and other compounds synthesized from 3 Methyl-1-butanethiol and other biomass materials also have good application prospects.
6. Synthetic surfactants: 3 Methyl-1-butanethiol can react with various surfactant raw materials to synthesize a series of surfactants. These biodegradable agents can be decomposed into carbon dioxide and water through microorganisms in nature, exhibiting good biodegradability and environmental friendliness. For example, sulfonylpropanoic acid ester surfactants synthesized from 3 Methyl-1-butanethiol and sulfonylpropanoic acid have good surface activity and biodegradability, and can be used to prepare environmentally friendly detergents, pesticide suspensions, and other products. In addition, surfactants such as biodegradable agents synthesized from 3-Methyl 1-butanethiol and other biomass materials also have good application prospects.
7. Synthetic polymer materials: 3-Methyl-1 butanethiol can be used to synthesize various polymer materials, such as polyurethane, polyester, and polyimide. These polymer materials can be used in fields such as coatings, adhesives, plastics, etc., providing excellent physical properties and chemical stability.
3-Methyl-1 butanethiol has a wide range of applications and plays an important role in fields such as organic synthesis, chemical industry, and agriculture, providing various choices for people's production and life. Especially in the field of synthesizing biodegradable agents, they have broad application prospects. These biodegradable agents can quickly decompose into carbon dioxide and water in specific environments, are environmentally friendly, and help solve problems such as environmental pollution and resource waste.
3-Methyl-1 butanethiol is an organic compound containing thiol groups, which has special odor and reaction properties. The following are several methods for synthesizing 3-Methyl-1-butanethiol in the laboratory:
Method 1:
1. Mix 3-Methylbutyraldehyde and potassium thiocyanide (KSCN), add potassium hydroxide solution, and prepare 3-Methylbutyraldehyde thiocyanide.
CC5H10O + KSCN+ KOH → C5H10S + NH4OH
2. React 3-Methylbutanitrile with hydrogen bromide to produce 3-Methylbutanitrile.
C5H10S + HBr → C5H10CN + H2S
3. React 3-Methylbutane with lithium aluminum hydride to produce 3-Methylbutanol (3-methylbutanol).
C5H10CN + LiAlH4 → C5H12OH + LiAl
4. Add sulfuric acid to 3-Methylbutanol and undergo hydrolysis reaction at appropriate temperature to generate 3 Methyl-1-butanethiol.
C5H12OH + H2SO4 → C5H12OS + H2O
Method 2 -- Industrial synthesis method:
1. Esterification reaction: Mix 3-methylbutanal, acetic acid, and ethanol, add sulfuric acid as a catalyst, and carry out esterification reaction at a certain temperature. The products generated by the reaction include ethyl acetate, methanol, water, and other byproducts.
C5H10O + CH3COOH + H2O → CH3COOC2H5 + CH3CH2OH
2. Dehydration reaction: The product of the esterification reaction is subjected to dehydration treatment, removing methanol and some ethyl acetate to obtain crude ethyl acetate.
CH3COOC2H5 + H2O → CH3COOH + C2H5OH
3. Distillation separation: Distillation separation is performed on crude ethyl acetate to obtain high-purity ethyl acetate.
4. Sulfurization reaction: Ethyl acetate and hydrogen sulfide undergo a sulfurization reaction at a certain temperature and pressure to produce.
CH3COOC2H5 + H2S → CH3CH2CH2CH2SH + HOC2H5
5. Product refining: Refine the generated 3-methyl-1 butanethiol to remove impurities and by-products, and obtain a high-purity 3 methyl-1-butanethiol product.
In summary, industrial production of 3-methyl-1-butanethiol requires strict control of raw material quality, reaction conditions, and operating procedures to ensure product quality and production efficiency. At the same time, it is necessary to pay attention to safety and environmental issues, and take necessary measures for risk control and waste disposal.
Core Characteristics Lay the Foundation for the Application
3-Methyl-1-butanol (CAS number: 541-31-1) is a sulfur-containing organic compound with the molecular formula C₅H₁₂S and a molecular weight of 104.21. Its physical properties include: a colorless to pale yellow liquid with a strong irritating odor; boiling point 117-120℃, flash point 18-19℃, density approximately 0.83-0.84 g/cm³; insoluble in water, but soluble in organic solvents such as ethanol. Chemically, this substance is flammable. It may cause combustion or explosion upon contact with open flames, high heat, or oxidants. When heated or exposed to acids, it releases toxic sulfide gas (such as hydrogen sulfide). Its reactivity stems from the strong nucleophilic nature of the thiol group (-SH) and its easy oxidation property. It can be converted into disulfides through oxidation reactions, or participate in nucleophilic substitution, addition, and other reactions.
Stable Demand in Existing Application Domains
Organic Synthesis Intermediate: As a key raw material, 3-methyl-1-butanol is widely used in the synthesis of sulfides, thioesters, heterocyclic compounds, etc. These products have significant value in the fields of pesticides, medicine, and fragrances. For example, its derivatives can be used to prepare new fungicides or insect repellents.
Fragrance and Flavor: Sulfur-containing compounds, due to their distinctive odor, are used in the flavoring and fragrance industries to create specific flavors. Although their direct application is limited by the intensity of the odor, through structural modification, low-odor and high-value-added fragrance products can be developed.
Materials Science: As cross-linking agents or modifiers, they participate in the synthesis of polymer materials, improving the heat resistance, mechanical properties, or chemical stability of the materials.
Breakthrough Potential in Emerging Application Domains
Pharmaceutical Field：
Antibiotic development: The antibacterial activity of thiol groups makes them potential candidates for new antibacterial drugs, especially research on resistant bacteria may become a hot topic.
Biological markers: Their metabolites or derivatives may be used for disease diagnosis, for example, by detecting specific levels of thiol metabolism to assist in early cancer screening.
Environmental Technology：
Heavy metal adsorbents: By utilizing the strong coordination effect between thiol groups and heavy metal ions, efficient and recyclable materials for treating heavy metal pollution have been developed.
Waste gas treatment: As a component of catalysts or adsorbents, they are used to remove harmful gases such as hydrogen sulfide from industrial waste gases.
New Energy Field：
Lithium-sulfur battery: Sulfur derivatives may serve as electrolyte additives or cathode materials for lithium-sulfur batteries, enhancing the battery's cycle stability and energy density.
Future Directions Driven by Technological Innovation
Green Synthesis Processes
Develop environmentally friendly synthesis routes such as catalytic hydrogenation and enzyme catalysis, reducing toxic by-products (such as hydrogen sulfide) in traditional methods and reducing production costs and environmental risks.
For example, using metal-organic framework (MOF) materials as catalysts to achieve efficient and selective synthesis.
Structural Optimization and Functionalization
By introducing functional groups (such as fluorine, chlorine, amino groups, etc.) through molecular design, the reactivity or targeting ability can be enhanced, thereby expanding its applications in fields such as drug delivery and material surface modification.
For example, synthesizing polymer brushes containing thiol groups, which can be used in biosensors or anti-fouling coatings.
Nanotechnology Application
Load 3-methyl-1-butanol onto nanomaterials (such as carbon nanotubes, graphene) surfaces to prepare high-performance composite materials, improving their performance in catalysis, adsorption, or electronic devices.
Challenges and Countermeasures
Safety and Environmental Issues
Strictly control production, storage, and transportation processes, adopt closed operations and explosion-proof equipment to prevent leakage and explosion risks.
Develop waste gas treatment systems to recover sulfur compounds and convert them into harmless substances (such as sulfates).
Odor Control
Reduce the irritating odor through microencapsulation, derivatization, etc., expand its application in consumer products.
Market Competition and Cost Control
Optimize supply chain management to reduce raw material costs; strengthen academic-industry-research cooperation to promote large-scale production and technological iteration.
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