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5-Heptylphen-1,3-diol is a binary phenolic organic compound with a clearly alkyl chain modification. The core structure of this compound consists of a benzene ring, and the two hydroxyl groups (-OH) are respectively connected to the ring in an ortho (1,3) position, giving the molecule typical phenolic chemical properties such as weak acidity and reducibility.
At the same time, the fifth carbon atom of the benzene ring is bonded to a straight-chain heptyl group (-C7H15), which introduces a hydrophobic long chain that significantly alters the physical properties of the molecule, enhancing its lipophilicity and possibly affecting its interaction with biological membranes or hydrophobic interfaces. Such structural features make it suitable as a special framework or intermediate in organic synthesis and may exhibit potential application value in materials science (such as liquid crystal precursors) and biochemistry (such as antioxidant research). Its specific substitution pattern also leads to unique behaviors in molecular packing and intermolecular hydrogen bonding formation.
Relevant chemical properties of 5-Heptylbenzene-1,3-diol are as follows
| C.F | C13H20O2 |
| E.M | 208.15 |
| M.W | 208.30 |
| E.A | C, 74.96; H, 9.68; O, 15.36 |
| m/z | 208.15 (100.0%), 209.15 (14.1%) |
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Physical and Chemical Properties
Density: 1.033 g/cm³
Boiling Point: 342.3°C (760 mmHg)
Refractive Index: 1.534
Solubility: Good solubility in organic solvents, but specific solubility data varies depending on the solvent.
Stability: Can maintain good stability when stored in a cool, dry, dark, and low-temperature environment.
Chemical Structure and Properties
Structural Characteristics: The molecule contains a benzene ring, with two hydroxyl groups (-OH) connected to positions 1 and 3 on the benzene ring, and one heptyl group (-C₇H₁₅) connected to position 5.
Chemical Properties:
Contains two hydroxyl groups, having certain reducing and acidic properties.
Can undergo oxidation-reduction reactions with oxidants and neutralize with bases.
Can participate in organic reactions such as esterification and etherification, generating various derivatives.
Synthesis Method
The synthesis method of 5-Heptylbenzene-1,3-diol may involve multiple organic reactions, including alkylation and oxidation steps. The specific synthesis route may vary depending on the raw materials and process conditions. One possible synthesis route is as follows:
Using 3,5-dimethoxy-1-n-heptylbenzene as the raw material, triboron trifluoride was added to the dry dichloromethane solution for the reaction.
The reaction mixture was reacted in an argon atmosphere at -78℃, and the temperature was gradually raised to 0℃, and the reaction was stirred until completion.
Methanol was added to destroy the unreacted triboron trifluoride, and the mixture was restored to room temperature and stirred.
The volatile substances were removed, and the residue was diluted with ethyl acetate, and then washed successively with saturated NaHCO₃ solution, water and brine.
The organic layer was separated and dried over anhydrous Na₂SO₄, filtered to remove the drying agent, and the filtrate was concentrated under vacuum under reduced pressure.
Silica gel column chromatography was used for separation and purification to obtain the target product 5-heptylbenzene-1,3-diol.
Pharmaceutical Synthesis Intermediate
5-Heptylphen-1,3-diol is an important synthetic intermediate in the field of fine pharmaceuticals. The active sites of hydroxyl groups can undergo various organic reactions such as esterification, etherification, and substitution, which are suitable for the modified synthesis of various drug molecules. Its alkyl hydrophobic chain can optimize the lipid solubility of drug molecules, help drugs penetrate biological cell membranes, and improve human absorption efficiency. At present, this substance is mainly used in the research and development of antibacterial and anti-inflammatory drugs.
It can be modified to synthesize phenolic derivatives with stronger antibacterial activity, inhibit bacterial cell membrane synthesis, and has a good inhibitory effect on Gram-positive bacteria. At the same time, it can participate in the preparation of antioxidant drugs, rely on phenolic hydroxyl groups to scavenge free radicals in the body, assist in the research and development of anti-aging and anti-inflammatory medical preparations, and has few synthetic by-products and simple purification, which is suitable for the standards of refined pharmaceutical production.
Polymer Chemical Modification Auxiliary
In the chemical materials industry, it is often used as a modifier additive for polymer materials. Phenolic hydroxyl groups can form hydrogen bonds with resin and rubber molecules, enhance the binding force between polymer molecules, and improve the heat resistance and structural stability of materials. When added to rubber products, it can act as an anti-aging agent, delay the oxidative aging of rubber, and extend the service life of light-colored rubber and medical latex products.
When used in the synthesis of epoxy resin and polyester resin, it can be used as a modified monomer to optimize curing performance and improve the corrosion resistance and mechanical strength of resins. In addition, the carbon chain structure of this substance can improve the flexibility of materials, reduce the probability of material brittleness in low-temperature environments, and is suitable for the processing and production of industrial composite materials and insulating coatings.
Functional Raw Material for Daily Chemical Skin Care
Relying on its excellent antioxidant and antibacterial properties, this compound is applied in the field of daily chemical skin care. Phenolic hydroxyl groups have high-efficiency antioxidant capacity, which can inhibit skin oxidation reactions, reduce melanin deposition, and play a role in brightening and repairing the skin.
At the same time, its mild antibacterial properties can inhibit the growth of harmful microorganisms on the skin surface, making it suitable for the production of oil-controlling and acne-removing skin care products.Compared with traditional preservative ingredients, this alkylresorcinol has lower irritation and stronger stability, and is not easily affected by acid-base environments. It is often added to toners, essences, and skin care creams, with dual effects of antiseptic, antibacterial and skin care conditioning, improving the safety of skin care products.
Auxiliary Reagent for Agricultural Production
In the agricultural field, 5-Heptylphen-1,3-diol can be used as a pesticide adjuvant and an intermediate for plant growth regulators. The hydrophobic carbon chain can enhance the adhesion of pesticide liquid on crop leaves, reduce the loss of pesticide liquid, and improve the efficacy utilization rate of insecticidal and bactericidal pesticides.
At the same time, its synthetic derivatives can regulate plant growth and metabolism, enhance crop stress resistance, and help crops resist pathogen infestation. In addition, this substance can be made into agricultural antiseptic and fresh-keeping agents, which are used for the storage and preservation of fruits and vegetables after harvesting, inhibit the growth of mold, delay the decay and deterioration of fruits and vegetables, and have low residue and good environmental compatibility, meeting the requirements of green agricultural production.
The analytical methods for 5-heptylbenzene-1,3-diol (5-庚基苯-1,3-diol) mainly include purity testing, structural identification, and physical property determination, etc. The specific analytical methods are as follows：
Purity Testing
High Performance Liquid Chromatography (HPLC)
Principle: Separation and detection are carried out by utilizing the difference in partition coefficients of different substances between the stationary phase and the mobile phase.
Steps: Dissolve the sample in an appropriate solvent and inject it into the high performance liquid chromatograph. Select an appropriate chromatographic column and mobile phase, set the appropriate flow rate and detection wavelength, and perform separation and detection. Calculate the purity of the sample based on the area or height of the chromatographic peaks.
Gas Chromatography (GC)
Principle: Separation and detection are carried out by utilizing the differences in volatility and adsorption properties of different substances in the gas phase.
Steps: Perform appropriate derivatization treatment on the sample (if necessary), then inject it into the gas chromatograph. Select an appropriate chromatographic column and carrier gas, set the appropriate column temperature and detector temperature, and perform separation and detection. Calculate the purity of the sample based on the area or height of the chromatographic peaks.
Structural Identification
Nuclear Magnetic Resonance Hydrogen Spectroscopy (¹H NMR)
Principle: Structural identification is carried out by utilizing the different chemical shifts of hydrogen atoms in the nuclear magnetic resonance instrument under different chemical environments.
Steps: Dissolve the sample in an appropriate deuterated solvent and inject it into the nuclear magnetic resonance instrument. Set appropriate scanning parameters and perform scanning and record the spectrum. Infer the structure of the sample based on the chemical shift, integral area, and coupling constant of each peak in the spectrum.
Mass Spectrometry (MS)
Principle: Separation and detection are carried out by utilizing the differences in movement trajectories of different substances in an electric field or magnetic field, and determining the molecular weight and structural information based on the mass-to-charge ratio (m/z).
Steps: Perform appropriate ionization treatment on the sample (such as electron bombardment, chemical ionization, etc.), then inject it into the mass spectrometer. Set appropriate scanning parameters and perform scanning and record the spectrum. Infer the molecular weight and structural information of the sample based on the mass-to-charge ratio and relative abundance of each peak in the spectrum.
Physical Property Measurement
Melting Point Measurement
Principle: Measurement is carried out by utilizing the characteristic that the temperature remains unchanged during the melting process of the substance.
Steps: Grind the sample into fine powder, load it into a capillary tube. Insert the capillary tube into the melting point measurement instrument, set an appropriate heating rate, and heat to observe the melting process of the sample. Record the temperature at which the sample begins to melt and completely melts as the melting point.
Advantages: Simple operation and accurate results.
Boiling Point Measurement
Principle: Measurement is carried out by utilizing the characteristic that the temperature remains unchanged during the boiling process of the substance.
Steps: Load the sample into a distillation flask, connect the distillation device. Set an appropriate heating rate, heat, and observe the boiling process of the sample. Record the temperature at which the sample begins to boil and becomes stable as the boiling point.
Advantages: Can accurately determine the boiling point of the sample, but the operation is relatively complex.
The safety and stability analysis of 5-Heptylphen-1,3-diol (5-heptylbenzene-1,3-diol) is as follows:
Safety
Lack of toxicity data: At present, there is a lack of detailed toxicity research data, making it impossible to directly assess its acute toxicity, chronic toxicity, or specific toxicity (such as carcinogenicity, mutagenicity).
Potential hazard speculation:
As a phenolic compound with two hydroxyl groups, it may have weak acidity and be irritating to the skin, eyes, or mucous membranes.
Long-term exposure or high-dose exposure may trigger allergic reactions or other health risks, but the specific effects need further research.
Chemical stability:
Under normal storage conditions (such as at room temperature and in a dark environment), the chemical properties are stable and prone to neither self-oxidation nor polymerization reactions.
Under extreme conditions (such as high temperature and strong acids/alkalis), it may decompose, generating harmful gases or by-products. Therefore, strict control of the storage environment is necessary.
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