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H-Pro-OtBu is an important N-terminal proline derivative with significant value in peptide synthesis and drug chemistry. Its molecular structure ingeniously combines the unique rigid pyrrole ring skeleton of proline with the protecting group of tert-butoxycarbonyl: The proline unit, as the only secondary amine structure in natural amino acids, not only endows the peptide chain with specific angle conformations to regulate secondary structure, but also significantly affects its recognition process with biological macromolecules; while the tert-butoxycarbonyl group at the terminus serves as a key protective element.
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Chemical Formula |
C9H17NO2 |
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Exact Mass |
171.13 |
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Molecular Weight |
171.24 |
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m/z |
171.13 (100.0%), 172.13 (9.7%) |
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Elemental Analysis |
C, 63.13; H, 10.01; N, 8.18; O, 18.69 |
Through its outstanding steric hindrance effect, it precisely shields the activity of carboxyl groups during solid-phase or liquid-phase peptide chain assembly, effectively preventing side reactions such as self-condensation or racemization. This characteristic makes it an indispensable building block for constructing complex cyclic peptides, functional peptides containing proline repeat sequences (such as collagen mimetic peptides), and various small molecule proteinase inhibitors. Especially when synthesizing peptide segments containing challenging Pro-Pro or Pro-X sequences, the stability and high reaction efficiency of H-Pro-OtBu provide a solid guarantee for obtaining high-purity and high-yield target products, and is a key basic raw material for constructing specific spatial structures in modern organic synthesis.
Pigmentation and Colorants
Pigments and colorants play a crucial role in multiple fields, not only endowing products with rich colors, but also enhancing their overall quality and durability.
In the field of ink and coatings, as an efficient and multifunctional coloring agent, H-PRO-OTBU is widely used in the production of ink, watercolor, paint, and printing ink. This coloring agent, with its excellent coloring ability and stable chemical properties, enables these products to exhibit vibrant and vivid color effects. At the same time, it also has excellent color fastness, which can maintain the long-lasting color even after long-term use or exposure to harsh environments, greatly extending the product's service life and aesthetics.
The rubber and natural paint industries also benefit from their applications. In the production process of rubber products, as a coloring agent, it can give rubber products more vivid and rich colors, enhance their visual appeal and market competitiveness. In terms of coloring of natural paint, it can not only enhance the color saturation of the paint surface, but also improve the durability and anti-aging performance of the paint film, making the coated items more beautiful and durable.
In addition, it also plays an important role in the cosmetics and coatings industries. In cosmetic formulas, as a pigment ingredient, it can provide products with diverse color choices and meet the personalized needs of different consumers. In coatings and printing inks, not only does it increase the color brightness and saturation of the product, but it also improves the stability of the ink and coating through its stable chemical properties, making the printing and coating effects more uniform and long-lasting.
Pharmaceutical and Biochemical Research
The application of L-proline tert butyl ester in the fields of pharmaceuticals and biochemical research has demonstrated its unique value and potential.
In the pharmaceutical field
L-proline tert butyl ester plays a crucial role as a key intermediate for the synthesis of various bioactive compounds and drugs. The uniqueness of this compound lies in its protected amino acid structure, which enables L-proline tert butyl ester to remain stable in complex chemical reactions and allows scientists to perform more precise and controlled reactions and modifications. By cleverly utilizing its structure, researchers can synthesize drug molecules with specific biological activities, providing strong support for new drug development.
Efficiency leap Precision and stability
Adopting high-performance integrated joints,the CRA series can increase the tempo by 25%,and the productivity can reach a new peak;the vibration suppression algorithm is upgraded to achieve a good anti-shaking effect;the full-parameter DH compensation algorithm and TrueMotion algorithm are supported,and the absolute positioning accuracy is 0.2 ~ 0.4 mm under the change of attitude movement,and the curved motion is precise and stable.
In summary, the application of L-proline tert butyl ester in the fields of pharmaceuticals and biochemical research not only provides important support for new drug development, but also provides a powerful tool for exploring and understanding the mysteries of life sciences. With the continuous advancement of science and technology and the deepening of research, it is believed that L-proline tert butyl ester will demonstrate its unique value and potential in more fields.
Chemical Industry
In the field of dye and pigment manufacturing
The demand for high-performance colorants is increasing, and a specific component plays a crucial role in this field. As a key component in dye and pigment formulations, H-PRO-OTBU not only gives products a rich and colorful appearance, but more importantly, it significantly enhances the light and weather resistance of colorants. This means that the dyes and pigments produced with the participation of this ingredient can maintain their vibrant and stable colors under prolonged exposure to light and harsh weather conditions, without easily fading or deteriorating.
This characteristic is crucial for many application fields such as outdoor advertising, building materials, automotive coatings, etc., as they need to withstand long-term environmental tests to maintain their original color.
In the chemical industry
This component also exhibits unique value as a catalyst or additive. In certain specific chemical reaction processes, its addition can significantly accelerate the reaction rate, making the entire production process more efficient. At the same time, it can optimize the quality of the product by precisely regulating the process of chemical reactions, reducing the generation of by-products, and improving the purity and performance of the target product. This improvement not only helps to reduce production costs, but also enhances the market competitiveness of products, injecting new vitality into the innovation and development of the chemical industry.
In summary, the application of this ingredient in dye and pigment manufacturing, as well as in the chemical industry, not only enriches the color expression of products and improves the durability of coloring agents, but also accelerates the chemical reaction process and optimizes product quality by acting as a catalyst or additive. Its multifunctional nature has brought significant technological progress and economic benefits to multiple industries.
Applications in Energy and Nutrition
The energy supplement market has developed rapidly in recent years, among which amino acids and their derivatives, as an important type of nutritional supplement, have received widespread attention. Although L-proline tert butyl ester itself has not been directly commercialized as an energy supplement, its structurally related amino acid derivatives have shown broad application prospects in this field.
These amino acid derivatives, through their unique chemical structure and biological activity, are believed to have a positive impact on human metabolic processes. They participate in multiple stages of energy metabolism, which helps optimize the energy supply mechanism in the body. During exercise, these derivatives can promote the breakdown of glycogen and oxidation of fatty acids in muscles, providing the body with a more stable and durable source of energy. This not only helps improve athletes' endurance and endurance, but also reduces fatigue after exercise.
In addition, these amino acid derivatives are also believed to have a positive impact on psychological performance under stress. They can regulate the synthesis and release of neurotransmitters, improve the functional state of the brain, enhance attention, reaction speed, and decision-making ability. This is particularly important for professions that require high levels of concentration and quick reflexes, such as athletes, pilots, pilots, etc.
Therefore, although L-proline tert butyl ester itself has not been directly used as an energy supplement, its structurally related amino acid derivatives have achieved significant results in this field. They provide new ways to improve overall human performance and health by influencing metabolic processes, fuel supply during exercise, and psychological performance under stress. With the deepening of research and continuous development of technology, it is believed that more energy supplements based on amino acid derivatives will emerge in the future, bringing greater improvements to human health and exercise performance.
applications in pigments & dyes
1. Pigmentation in Art Materials
Ink and Paints: H-PRO-OTBU serves as a pigmenting agent in ink formulations, including those used for printing, writing, and artistic purposes. In watercolors, oil paints, and stamp pad inks, it adds color intensity and ensures long-lasting colorfastness. This allows artists and printers to create vivid and enduring works of art.
2. Coloring in Industrial Products
Rubber and Natural Lacquer: In the manufacturing of rubber products and natural lacquers, L-Proline tert-Butyl Ester functions as a coloring agent. It enhances the visual appeal of these materials by imparting a desired hue that is both attractive and durable. This improves the overall quality and marketability of rubber goods and lacquered surfaces.
3. Cosmetic and Personal Care Products
Cosmetic Coatings: Although not traditionally classified as dyes in the strictest sense, L-Proline tert-Butyl Ester or related compounds may be utilized in cosmetic formulations as colorants or pigmentation enhancers. They contribute to the evenness and opacity of cosmetic coatings, ensuring a flawless and long-lasting finish.
4. Dye Manufacturing and Formulations
Dye Intermediates: While L-Proline tert-Butyl Ester itself might not be directly used as a dye, it can serve as an intermediate in the synthesis of more complex dyes and pigments. Its unique chemical structure allows for controlled modifications and reactions, leading to the production of high-performance colorants with improved properties such as lightfastness, weather resistance, and color intensity.
Adverse reactions
Common adverse reaction types of H-PRO-OTBU
Adverse reactions to the digestive system
Nausea and vomiting
Nausea and vomiting are one of the common digestive system adverse reactions of H-PRO-OTBU. In clinical observations and some experimental studies, it has been found that a certain proportion of patients may experience varying degrees of nausea after using H-PRO-OTBU, which can be accompanied by vomiting symptoms in severe cases. This adverse reaction usually occurs in the early stages after medication and may be related to direct stimulation of the gastrointestinal mucosa by the drug, or it may be triggered by affecting the vomiting center of the central nervous system. For example, drugs may alter the normal peristaltic rhythm of the gastrointestinal tract, causing changes in gastric pressure, stimulating gastric mucosal receptors, and transmitting signals to the central nervous system, thereby triggering nausea and vomiting reflexes.
Diarrhea or Constipation
Some patients may experience intestinal dysfunction symptoms such as diarrhea or constipation after using H-PRO-OTBU. The occurrence of diarrhea may be related to drugs affecting the balance of intestinal microbiota, increasing intestinal secretion, or altering the permeability of intestinal mucosa. Constipation may be caused by drugs inhibiting normal intestinal peristalsis, causing feces to stay in the intestine for too long and causing excessive absorption of water. The frequency and severity of these adverse reactions vary among individuals and may be related to the dosage and duration of medication.
Adverse reactions to the nervous system
Headache and Dizziness
Headache and dizziness are also common adverse reactions of H-PRO-OTBU. Headaches may manifest as mild to moderate swelling or stabbing pain, with an unstable location and sometimes accompanied by a feeling of pressure on the head. Dizziness is mainly manifested as the patient feeling themselves or the surrounding environment rotating and shaking, which affects their sense of balance and spatial orientation ability. These symptoms may be related to the effects of medication on the nervous system, such as interference with the normal transmission of neurotransmitters, affecting the vasomotor function of cerebral blood vessels, leading to abnormal blood supply to the brain, and causing headaches and dizziness.
Insomnia or drowsiness
Some patients may experience sleep disorders after using H-PRO-OTBU, manifested as insomnia or drowsiness. Insomnia patients may have difficulty falling asleep, have shallow sleep, or wake up early, leading to daytime lethargy and fatigue. However, patients with excessive sleepiness often unconsciously fall asleep during the day, which affects their normal life and work. The occurrence of this sleep disorder may be related to the excitatory or inhibitory effects of drugs on the central nervous system, and differences in individual responses to drugs may lead to opposite sleep manifestations.
Adverse reactions to skin and appendages
Skin rash
Rash is a common skin adverse reaction of H-PRO-OTBU, which can manifest in various forms such as erythema, papules, and maculopapular lesions. Rashes usually appear within a few days to weeks after medication and can be distributed to various parts of the body, but are more common in the trunk and limbs. The occurrence of rash may be related to allergic reactions caused by drugs. Drugs act as haptens and bind with proteins in the body to form complete antigens, stimulating the body's immune system to produce antibodies, triggering immune reactions, and leading to inflammation and damage to the skin and mucous membranes.
Itching
In addition to the rash, some patients may also experience skin itching symptoms, which can occur alone or simultaneously with the rash. The degree of itching varies, ranging from mild discomfort to severe discomfort that may affect the patient's sleep and quality of life. The mechanism of itching may be related to drug stimulation of skin nerve endings, release of inflammatory mediators such as histamine, which act on the sensory nerves of the skin and trigger the transmission of itching signals.
Adverse reactions in the blood system
Decreased white blood cells
In some clinical studies and long-term medication observations, it has been found that H-PRO-OTBU may lead to leukopenia. White blood cells are an important component of the human immune system, and a decrease in their quantity can weaken the body's resistance and increase the risk of infection. The occurrence of leukopenia may be related to the inhibition of bone marrow hematopoietic function by drugs, which may affect the proliferation and differentiation of hematopoietic stem cells in the bone marrow, leading to a decrease in leukocyte production.
Thrombocytopenia
Thrombocytopenia is also one of the blood system adverse reactions that H-PRO-OTBU may cause. Platelets play a crucial role in the process of blood coagulation, and a decrease in platelets can lead to abnormal coagulation function. Patients may experience bleeding symptoms such as skin bruising, nosebleeds, and gum bleeding. The mechanism of its occurrence may be related to drug-induced immune response, where antibodies produced by the immune system attack platelets, leading to increased platelet destruction, and may also affect the generation and maturation of megakaryocytes in the bone marrow, reducing platelet production.
H-Pro-OtBu, namely L-proline tert-butyl ester, is an important amino acid derivative widely used in peptide synthesis, and its discovery is closely linked to the development of peptide chemistry in the 20th century. In the mid-20th century, as peptide synthesis technology gradually matured, researchers began to focus on developing stable amino acid esters to protect the carboxyl group of amino acids, which laid the foundation for the discovery of H-Pro-OtBu.
In the 1960s and 1970s, with the rise of solid-phase peptide synthesis and liquid-phase peptide synthesis methods, the demand for high-purity, stable amino acid derivatives increased sharply, prompting chemists to explore various esterification reactions of proline. Early studies found that tert-butyl ester groups have excellent stability under acidic conditions and can be easily removed without damaging other functional groups, making them ideal protective groups for amino acid carboxyl groups.
H-Pro-OtBu was first synthesized through the esterification reaction of L-proline and tert-butanol under acidic catalysis, and its structure was confirmed by spectral analysis. Relevant early studies, such as the synthesis of β-endorphin fragments, used H-Pro-OtBu as a key raw material, proving its practical value in peptide synthesis. Later, with the advancement of analytical technology, H-Pro-OtBu's purity and application performance were continuously optimized, and it was gradually commercialized, with its CAS number 5497-76-7 widely recorded in chemical databases. Today, it remains a core raw material in peptide synthesis, and its discovery has promoted the development of fields such as biochemistry and pharmaceutical research.
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