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Tianeptine ethyl ester, CAS number: 66981-77-9, molecular formula C23H29ClN2O4S, molecular weight 465.01. Soluble in chloroform (small amount) and methanol (small amount). This indicates that the ethyl ester of tianeptin has a certain solubility in organic solvents, but the solubility is not high. It is an important chemical substance mainly used in the pharmaceutical field as an intermediate or raw material. It is a derivative of tianeptin that can be used to synthesize tricyclic compounds with psychoactive, anti ulcer, and antiemetic properties. In the pharmaceutical field, it may serve as an important intermediate or raw material for synthesizing other drugs. It is a selective serotonin reuptake enhancer (SSRE) used to treat severe depressive episodes. Thianetin sodium salt is a tricyclic compound with psychoactive, anti ulcer, and antiemetic effects.
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C.F |
C23H29ClN2O4S |
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E.M |
464 |
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M.W |
465 |
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m/z |
464 (100.0%), 466 (32.0%), 465 (24.9%), 467 (8.0%), 466 (4.5%), 466 (2.7%), 468 (1.4%), 467 (1.1%) |
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E.A |
C, 59.41; H, 6.29; Cl, 7.62; N, 6.02; O, 13.76; S, 6.89 |
As a derivative of tianeptin, the mechanism of action of tianeptine ethyl ester is similar to that of tianeptin, but the specific use may differ due to compound characteristics and research progress.
Antidepressant treatment
Basic mechanism of action: It exerts antidepressant effects by enhancing synaptic plasticity in the prefrontal cortex and hippocampus, promoting brain-derived neurotrophic factor (BDNF) expression, regulating glutamatergic system function, and reducing stress-induced neuronal damage. As a serotonin (5-HT) reuptake enhancer, it indirectly increases the activity of norepinephrine (NE) and dopamine (DA) receptors by inhibiting the function of 5-HT2A receptors, improving depressive symptoms.
Potential use speculation: As a derivative of tianeptin, it may inherit its core antidepressant mechanism, improve blood-brain barrier penetration, prolong half-life, or enhance receptor affinity by optimizing molecular structure, thereby enhancing antidepressant efficacy. Its use may cover mild to severe depression, especially for depressed patients with anxiety symptoms, as well as anxiety and depression states that occur during alcohol dependence withdrawal.
Anxiety disorder treatment
Basic mechanism of action: By regulating the balance of neurotransmitters in the brain (such as enhancing 5-HT signaling), anxiety symptoms can be alleviated, and its antidepressant effect can indirectly improve anxiety associated with depression.
Potential use speculation: It may achieve more efficient anti anxiety effects by further optimizing the regulatory effect on the 5-HT system or simultaneously acting on the glutamatergic system (such as inhibiting NMDA receptor overactivation). Its use may be extended to subtypes of anxiety disorders such as generalized anxiety disorder and social anxiety disorder.
Neuroprotection and improvement of cognitive function
Basic mechanism of action: By blocking glutamate receptors, reducing excessive excitotoxic damage, and delaying the progression of neurodegenerative diseases; Simultaneously promoting the regeneration of cholinergic nerve fibers in the hippocampus, inhibiting neuronal apoptosis, and improving learning and memory abilities.
Potential use speculation: It may be used as an adjuvant therapy for neurodegenerative diseases such as Alzheimer's disease by enhancing neuroprotective effects, or improving cognitive dysfunction caused by depression and anxiety. In addition, it may promote functional recovery after brain injury by regulating synaptic plasticity.
Sleep disorder treatment
Basic mechanism of action: promoting sleep by enhancing postsynaptic inhibition mediated by gamma aminobutyric acid type A receptors; At the same time, its anti anxiety effect can reduce the frequency of nighttime awakenings and improve sleep quality.
Potential use speculation: It may achieve more efficient hypnotic effects by optimizing the regulation of GABA receptors or simultaneously acting on the 5-HT system (such as regulating melatonin secretion). Its use may be extended to the treatment of sleep disorders such as insomnia and sleep apnea syndrome.
Chronic pain management
Basic mechanism of action: Its antidepressant effect can indirectly improve emotional disorders caused by chronic pain (such as depression and anxiety), and it may directly alleviate pain by regulating the endogenous pain suppression system (such as enhancing opioid peptide activity).
Potential use speculation: It may achieve more efficient analgesic effects by enhancing the regulation of pain signaling pathways or simultaneously acting on the glutamatergic system (such as inhibiting excessive excitation of spinal dorsal horn neurons). Its use may be extended to the treatment of chronic pain syndromes such as neuropathic pain and fibromyalgia.
Substance dependence withdrawal treatment
Basic mechanism of action: It can improve anxiety and depression in alcohol dependent patients during the withdrawal period and reduce the risk of relapse; The mechanism may involve regulating the reward system (such as inhibiting dopamine release) and alleviating withdrawal symptoms (such as anxiety and insomnia).
Potential use speculation: It may achieve more efficient withdrawal treatment by optimizing the regulatory effect on the reward system or simultaneously acting on the glutamatergic system (such as inhibiting neuronal overexcitation caused by withdrawal). Its use may be extended to the withdrawal treatment of opioid and benzodiazepine drug dependence.
Other potential uses
Stress related disorders: may improve symptoms of stress-related diseases such as post-traumatic stress disorder (PTSD) and adaptation disorders by regulating the activity of the hypothalamic pituitary adrenal axis (HPA axis).
Functional gastrointestinal diseases: Thiamethasone has an improving effect on gastrointestinal discomfort symptoms related to anxiety and mood disorders, such as irritable bowel syndrome. Thiamethasone ethyl ester may be used for the treatment of such diseases through a similar mechanism.
The synthesis method of Tianeptine Ethyl Ester mainly involves organic chemical reactions, and the process may vary depending on specific literature or research. The following is a common synthesis method for the ethyl ester of tianeptin based on existing data:
Common synthesis methods of ethyl pheniramate
Raw material preparation
Firstly, it is necessary to prepare the raw materials required for the synthesis of thiazepine ethyl ester, which typically include 7-aminoheptanoic acid ethyl ester (or other similar structured amine compounds) and compounds containing a thiazepine ring (such as 5,8-dichloro-10-dioxo-11-methyldibenzo [c, f] thiazepine). The purity and quality of these raw materials have a significant impact on the yield and quality of the final product.
Saiptin (Initumumab) and Hesetin (Trastuzumab) are two antibody drugs targeting HER2 (human epidermal growth factor receptor 2), which play an important role in cancer treatment. Although the two have similarities in their mechanisms of action, there are some differences in key characteristics and clinical applications.
The following is a detailed comparison between Saiputin and Hesetin.
Mechanism and principle of action
Both cytidine and Herceptin exert their effects by acting on the extracellular portion of the HER2 receptor. HER2 receptor is overexpressed in many cancers, especially breast cancer and gastric cancer. These two drugs block the growth signal of cancer cells by binding to HER2 receptors and inhibiting the activation of intracellular tyrosine kinases.
Specifically, Saiputin and Hesetin prevent the attachment of human epidermal growth factor (EGF) to HER2 by attaching themselves to the HER2 receptor. Due to EGF being an important signaling molecule for cancer cell growth, this blocking effect can significantly inhibit the growth and proliferation of cancer cells. At the same time, these two drugs can also stimulate the body's own immune cells to kill cancer cells, forming the effect of immunotherapy.
Drug characteristics and optimization
1. Fc segment optimization and ADCC effect
As a new generation drug, Saiputin has been optimized in the Fc region (the constant region of antibodies). This optimization results in stronger antibody dependent cell-mediated cytotoxicity (ADCC) effects of Saiputin. The ADCC effect is an important mechanism by which antibody drugs kill cancer cells by activating effector cells such as natural killer cells (NK cells) in the immune system.
Research has shown that the ADCC effect of Saiputin is 1.11 times that of Hesetin. This means that Saiputin may have a stronger ability to activate the immune system and kill cancer cells. This advantage is expected to bring better anti-tumor effects to patients.
2. Fab segments and light chain structures
The Fab segment (variable region of the antibody) of cytidine has two light chains identical to those of Herceptin, each containing 214 amino acids. This similarity gives Saiputin a similar affinity and specificity to Herceptin when binding to HER2 receptors.
However, Saiputin was further optimized in the constant region. Especially on the 359th and 361st amino acids of the Fc segment heavy chain constant region, Saibutin has been optimized and modified (D359, L361), while Heseptin is E359, M361. This optimization has enhanced the ability of Saiputin to activate the body's immune system.
3. Glycosylation modification and drug stability
In terms of glycosylation modification, Saiputin has also been optimized. The sialylation level of Initumumab increased by 60%, which helps to prolong the half-life of the drug. At the same time, the high mannose glycation level decreased by 40%, thereby reducing the risk of immunogenicity. These optimizations have resulted in better drug stability and safety performance of Saiputin.
Development History
The discovery of telmisartan ethyl ester can be traced back to the mid-20th century, when treatment options for depression were relatively limited and relied mainly on traditional tricyclic antidepressants and monoamine oxidase inhibitors. Although these drugs have alleviated patients' symptoms to some extent, their side effects are significant and their efficacy is limited. Therefore, finding a safer and more effective antidepressant became an important issue in the medical community at that time.
In this context, French scientist Louis Julou and his team began a series of research work. They attempted to find a new compound that can effectively alleviate depressive symptoms with fewer side effects by modifying and optimizing the structure of existing antidepressant drugs.
After years of effort, the Julou team finally synthesized the precursor compound telmisartan ethyl ester in the late 1960s. The preliminary study of telmisartan indicates that it has significant antidepressant effects with minimal side effects, laying the foundation for subsequent research.
With further research on tiapride, scientists have found that its ethyl ester derivatives have superior pharmacological effects. It not only inherits the antidepressant effect of telmisartan, but also further enhances the stability and bioavailability of the drug by introducing ethyl ester groups. This discovery made it a hot topic in the research of antidepressant drugs at that time. The background of its discovery reflects the urgent need for new antidepressant drugs in the medical community at that time.
By modifying and optimizing the structure of existing drugs, scientists have successfully developed a safer and more effective antidepressant, opening up new avenues for the treatment of depression. This discovery not only has important scientific significance, but also lays a solid foundation for subsequent clinical research and applications.
In the early stages of research, scientists mainly focused on its synthesis method, preliminary pharmacological experiments, and safety evaluation. These studies have laid a solid foundation for subsequent clinical trials and applications.
Its preparation is mainly achieved through the esterification reaction of tianeptin. The specific steps include reacting telmisartan with ethanol under the action of an acidic catalyst to produce telmisartan ethyl ester. This process requires strict control of reaction conditions, such as temperature, pH value, and reaction time, to ensure the purity and yield of the product. Although the early synthesis methods were relatively simple, the yield was low. Subsequent studies have significantly improved synthesis efficiency by optimizing reaction conditions and introducing new catalysts.
A key step in evaluating its antidepressant effect. Researchers conducted a series of behavioral experiments using animal models such as mice and rats, including forced swimming experiments, tail suspension experiments, and outdoor experiments. These experimental results indicate that it can significantly shorten the immobility time of animals, improve activity levels, and demonstrate significant antidepressant effects. In addition, researchers also used brain microdialysis technology to detect its effect on the levels of monoamine neurotransmitters such as serotonin, norepinephrine, and dopamine, and found that it can regulate the release and reuptake of these neurotransmitters, thereby exerting antidepressant effects.
Another important aspect of early research. Researchers evaluated its safety through acute toxicity experiments, subacute toxicity experiments, and chronic toxicity experiments. The acute toxicity test results showed that its LD50 was high, indicating low acute toxicity. Through long-term administration, subacute and chronic toxicity experiments were conducted to observe the overall condition, weight changes, blood indicators, and organ pathological changes of the animals. The results showed no significant toxic reactions at the recommended dose, indicating good safety.
FAQ
What is tianeptine ethyl ester used for?
Tianeptine is a medicine available for use in some European, Asian and South American countries to treat anxiety, depression and irritable bowel syndrome. In other countries, including the U.S., tianeptine is not approved for any medical use.
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