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D-biotin powder, also known as biotin, vitamin H, or coenzyme R, is a water-soluble B-complex vitamin (vitamin B7). Molecular formula C biotin 10H16N2O3S, CAS 200-399-3, appears as white crystalline powder or colorless elongated needle shaped crystals. It has good solubility in solvents such as hot water, dimethyl sulfoxide, alcohol, and benzene, but is not easily soluble in other common organic solvents. This solubility characteristic makes it have broad application potential in food processing and preparation processes.
It also has important physiological functions and wide application value. For example, it can be used as a nutritional supplement as a processing aid in the food industry; In the field of medicine, it can be used to treat certain skin diseases and promote lipid metabolism, etc; In addition, it can also be used as a fortifier in infant and toddler food, as well as for the labeling production of proteins, antigens, antibodies, nucleic acids (DNA, RNA), etc. As a coenzyme of various carboxylases in living organisms, it plays a crucial role in cell growth, fatty acid synthesis, gluconeogenesis, and protein and fat metabolism.
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Chemical Formula |
C10H16N2O3S |
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Exact Mass |
244 |
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Molecular Weight |
244 |
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m/z |
244 (100.0%), 245 (10.8%), 246 (4.5%) |
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Elemental Analysis |
C, 49.16; H, 6.60; N, 11.47; O, 19.65; S, 13.12 |
D-biotin powder, also known as vitamin B7 or coenzyme R, is a water-soluble vitamin that plays a crucial role in multiple metabolic processes in the human body. As a coenzyme of many enzymes, D-biotin participates in various biochemical reactions and is of great significance for maintaining normal physiological functions in the human body.
The function
1. Participate in lipid metabolism
D-biotin plays a crucial role in lipid metabolism. Firstly, it participates in the synthesis of fatty acids and is an essential substance for the normal synthesis and metabolism of long-chain unsaturated fatty acids. In addition, D-biotin is also related to the synthesis of acetylcholine and cholesterol metabolism, helping to maintain blood lipid balance and normal nervous system function.
2. Participate in protein and nucleic acid metabolism
D-biotin also plays an important role in protein and nucleic acid metabolism. It is involved in protein synthesis, amino acid deamination, purine synthesis, aminoacyl transfer, as well as leucine and tryptophan catabolism, and is necessary for the transfer and decarboxylation of various amino acids. In addition, D-biotin also participates in the synthesis and repair of nucleic acids (DNA and RNA), playing a crucial role in the transmission and expression of genetic information.
3. Participate in carbohydrate metabolism
In carbohydrate metabolism, D-biotinase participates in catalytic decarboxylation and carboxylation reactions and is an essential component of the tricarboxylic acid cycle. Through this process, D-biotin helps the body generate energy and maintain normal cell function.
4. Participate in the metabolism of other substances
In addition to the three main metabolic processes mentioned above, D-biotin also participates as a coenzyme component in other nutrient metabolism processes such as methylation transfer and sugar metabolism. These metabolic processes are of great significance for maintaining normal physiological functions in the human body.
5. Cell proliferation and differentiation
D-biotin plays an important role in cell proliferation and differentiation. It helps maintain normal cell growth and division, and is particularly important for maintaining the health of the skin, hair, and nails. In addition, D-biotin is also involved in the development process of the fetus and has a significant impact on the formation and growth of the embryo.
6. Improving skin health
D-biotin has a significant impact on skin health. It can promote the renewal and repair of skin cells, improve skin elasticity and glossiness. In addition, D-biotin can also reduce skin inflammation and allergic reactions, and has certain therapeutic effects in treating certain skin diseases such as acne and eczema.
7. Promote healthy hair and nails
D-biotin is also of great significance for the health of hair and nails. It can promote the growth and repair of hair and nails, improve their quality and appearance. D-biotin has a positive improvement effect on thin and brittle hair and nails.
8. Regulating blood sugar levels
D-biotin can help regulate blood sugar levels and improve insulin sensitivity. For patients with diabetes, D-biotin supplementation is helpful to control blood sugar level and reduce complications.
9. Lowering cholesterol levels
D-biotin can promote fat metabolism and lower cholesterol levels. This helps to prevent the occurrence of cardiovascular diseases and maintain cardiovascular health.
10. Other functions
In addition to the above functions, D-biotin also has some other physiological effects. For example, it can promote intestinal health and improve digestive function; Enhance immunity and enhance body resistance; Relieve stress and anxiety, etc.
In organic synthetic chemistry, the synthesis of D-biotin powder is a complex but important process. Biotin is a water-soluble B-group vitamin that plays an indispensable role in maintaining normal physiological functions in the human body.
Detailed steps
Step 1: Debenzylation/cyclization reaction
Reagents and conditions:
Starting substance:5-[(1R, 3aS, 6aR)-4,6-dibenzyl-5-oxohexahydro-1H-thiopheno [3,4-d] imidazol-1-yl] valerate II
Inorganic acids:Such as hydrochloric acid, sulfuric acid, etc., used to catalyze debenzylation reactions
Organic solvents:Such as methanol, ethanol, etc., used as reaction media
Reaction conditions:Room temperature to reflux temperature, stirring for several hours.
Operation process:
1. Dissolve the starting substance 5- [(1R, 3aS, 6aR) -4,6-dibenzyl-5-oxohexahydro-1H-thiopheno [3,4-d] imidazol-1-yl] valerate II in a selected organic solvent.
2. Slowly add inorganic acids, control the reaction temperature, and continue stirring.
3. Monitor the reaction process and stop the reaction when the debenzylation and cyclization reactions are basically completed.
Chemical equation:
Benzyl 5- [(1R, 3aS, 6aR) -4,6-di (R1) -5-oxohexahydro-1H-thiopheno [3,4-d] imidazol-1-yl] valerate II+HX (Inorganic Acid) → (2S, 3S, 4S) -5-(3,4-diamino-tetrahydrothiophene-2-yl) valerate hydrochloride III +R1-H (benzyl alcohol)+other by-products
Note: This equation only represents the main reaction pathway, and other by-products may be generated in actual reactions.
Step 2: Ring closing reaction and acidification
Reagents and conditions:
Starting substance:(2S, 3S, 4S)-5-(3,4-diamino-tetrahydrothiophene-2-yl) valerate hydrochloride III
Cyclization reagents:Such as formaldehyde, formic acid, etc., used to promote cyclization reactions
Alkaline solvents:Aqueous solutions such as sodium hydroxide and potassium hydroxide, used to neutralize hydrogen halides and provide an alkaline environment
Organic solvents:Such as methanol, ethanol, etc., used as reaction media
Reaction conditions:Room temperature to reflux temperature, stirring for several hours
Operation process:
1. Dissolve the starting substance (2S, 3S, 4S)-5-(3,4-diamino-tetrahydrothiophene-2-yl) valerate hydrochloride III in a selected organic solvent.
2. While stirring, slowly add alkaline solvent to neutralize the halogenated salt and create an alkaline environment.
3. Then add the cyclization reagent and continue stirring the reaction.
4. Monitor the reaction process and stop the reaction when the ring closing reaction is basically completed.
5. Directly add acids (such as hydrochloric acid and sulfuric acid) for acidification to convert the product into d-biotin.
Chemical equation:
(2S, 3S, 4S)-5-(3,4-diamino-tetrahydrothiophene-2-yl) valerate hydrochloride III+base (such as NaOH) → (2S, 3S, 4S)-5-(3,4-diamino-tetrahydrothiophene-2-yl) valerate (neutralization reaction)
(2S, 3S, 4S)-5-(3,4-diamino-tetrahydrothiophene-2-yl) valeric acid+cyclization reagent (such as HCHO) → intermediate product (specific structure omitted, complex cyclization process)
Intermediate product+HX (inorganic acid) → C10H16N2O3S +other by-products
D-biotin powder, also known as vitamin H or coenzyme R, is a water-soluble B-group vitamin that plays a crucial role in maintaining normal physiological functions in the human body. In recent years, with the rapid development of biotechnology, the use of biological methods to synthesize D-biotin has become an efficient and environmentally friendly preparation method.
Synthesis steps
1. Strain screening and cultivation
In the process of synthesizing D-biotin through biological methods, it is first necessary to screen strains with high biotin synthesis ability. At present, strains commonly used for D-biotin synthesis include Escherichia coli and Bacillus subtilis. Through genetic engineering methods, engineering strains that efficiently express genes related to D-biotin synthesis can be constructed.
After selecting suitable strains, it is necessary to cultivate them. Usually, strains are cultured in a medium containing an appropriate amount of carbon, nitrogen, inorganic salts, and growth factors. The cultivation conditions such as temperature, pH value, and ventilation rate need to be optimized according to the characteristics of the strain.
2. Fermentation production
After the strain is cultured to a certain density, fermentation can begin to produce D-biotin. During the fermentation process, the strains utilize the nutrients in the culture medium for metabolism to synthesize D-biotin. The fermentation process requires control of temperature, pH value, ventilation rate and other conditions to ensure the normal growth of strains and efficient synthesis of D-biotin.
In order to further increase the yield of D-biotin, the fermentation process can be optimized by adding inducers, precursor substances, and other methods. For example, adding precursor substances such as adenosine and pyruvate for biotin synthesis can increase the rate of D-biotin synthesis.
3. Extraction and purification
After fermentation, it is necessary to extract and purify the fermentation broth to obtain high-purity D-biotin products. Common extraction methods include solvent extraction, ion exchange, adsorption, etc. Among them, solvent extraction method is widely used due to its simple operation and low cost.
During the extraction process, it is important to choose appropriate solvents and extraction conditions to ensure the extraction efficiency and purity of D-biotin. The extracted solution needs to be concentrated and dried to remove solvents and moisture.
The purification process usually uses methods such as crystallization, recrystallization, and chromatographic separation. These methods can effectively remove impurities and improve the purity of D-biotin. During the purification process, it is necessary to control conditions such as temperature and solvent ratio to ensure the purification effect.
4. Product testing
After extraction and purification, quality testing of D-biotin products is required. Common detection methods include high-performance liquid chromatography (HPLC), mass spectrometry (MS), etc. These methods can accurately determine the content, purity, and structure of D-biotin.
At the same time, it is necessary to evaluate the safety of the product. This includes checking whether the product contains toxic and harmful substances, and whether it meets relevant standards and regulatory requirements. Only through strict quality testing and safety assessment can the quality and safety of D-biotin products be ensured.
Early Exploration and Phenomenon Discovery
At the beginning of the 20th century, researchers discovered that yeast growth relied on trace active substances. Meanwhile, long-term intake of raw egg white caused skin and hair lesions in animals, confirming the existence of an essential protective factor in nature.
Substance Isolation and Unified Nomenclature
In 1936, biotin was isolated, purified and named from egg yolk. Coenzyme R and Vitamin H discovered in the same period were later proven to be the same substance, classified as Vitamin B7.
Structural Confirmation and Mass Production
The chemical stereostructure of D-biotin was clarified in 1942, followed by total chemical synthesis. In 1949, the industrial production of the product was realized, which has been widely applied in pharmaceutical, daily chemical and feed industries.
FAQ
What does d biotin do for you?
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D-biotin (Vitamin B7) is a water-soluble vitamin essential for converting food into energy, supporting metabolic function, and maintaining healthy skin, hair, and nails. It acts as a coenzyme for carboxylase enzymes, supporting fatty acid synthesis, amino acid metabolism, and gene regulation. It is commonly used to treat deficiencies, which can cause hair loss and skin rashes.
Can you take biotin with Hashimoto's?
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Yes, you can take biotin with Hashimoto's, but you must stop taking it 2–3 days before thyroid blood tests to avoid false results. While biotin does not damage the thyroid, high doses (often used for hair loss) can interfere with lab assays, making TSH falsely low and T3/T4 falsely high, mimicking hyperthyroidism.
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