(-)-Huperzine A

(-)-Huperzine A 속성

(-)-Huperzine A C화학적 특성, 용도, 생산

개요

Huperzine A is obtained from Huperzia serrata, which is the perennial fern. It shows activities in antipyretic, hemostasis, and dehumidification and is used for the treatment in folk of pneumonia, lung abscess, hematemesis, hematochezia, traumatic injury, etc.

화학적 성질

Pale Brown Solid

물리적 성질

Appearance: white crystalline powder. Bitter with hygroscopicity. Solubility: easily soluble in chloroform, soluble in methanol and ethanol, and slightly soluble in water. Melting point: 211–216?°C.

용도

Huperzine A is a potential therapeutic agent for Alzheimer disease that reversible alkaloid inhibitor of AChE which crosses the blood-brain barrier. It reduces cell death induced by glutamate in primary cultures derived from forebrain, hippocampus, cortex and cere.
In China, it is approved for use in the treatment of Alzheimer’s disease (AD). Huperzine A was classified as a dietary supplement by the FDA in 1997. As a nutraceutical, it is available in American health food stores or via the Internet, labeled as a memory aid.

Indications

Huperzine A is purified from Chinese club moss and has been traditionally used in China for the treatment of swelling, fever, inflammation, blood disorders, and schizophrenia. It was mainly applied to age-related memory dysfunction and Alzheimer and has a good effect on improving memory function. It can be used to treat various types of Alzheimer's disease and also myasthenia gravis.

제조 방법

(-)-Huperzine A, a Lyco-podium alkaloid isolated in 1986 from the club moss Huperzia serrata, has drawn considerable attention after it was revealed to be a potent, selective, and reversible AChE inhibitor.

The total synthesis of Lycopodium alkaloid (-)-huperzine A has been accomplished in 10 steps with 17% overall yield from commercially abundant (R)-pulegone. The synthetic route features an efficient synthesis of 4 via a Buchwald–Hartwig coupling reaction, a dianion-mediated highly stereoselective alkylation of 4, and a rare example of an intramolecular Heck reaction of an enamine-type substrate. The stereoselective β-elimination and the accompanying Wagner–Meerwein rearrangement are of particular interest.
[1] RUI DING Guo Q L Bing Feng Sun*. An Efficient Total Synthesis of (-)-Huperzine A [J]. Organic Letters, 2012, 14 17: 4446-4449. DOI:10.1021/ol301951r.
[2] RUI DING. Divergent Total Synthesis of the Lycopodium Alkaloids Huperzine A, Huperzine B, and Huperzine U[J]. The Journal of Organic Chemistry, 2013, 79 1: 240-250. DOI:10.1021/jo402419h.
[3] TUN M K M, WüSTMANN D J, HERZON S B. A robust and scalable synthesis of the potent neuroprotective agent (-)-huperzine A [J]. Chemical Science, 2011, 11: 2251-2253. DOI:10.1039/C1SC00455G.

정의

ChEBI: Huperzine A is a sesquiterpene alkaloid isolated from a club moss Huperzia serrata that has been shown to exhibit neuroprotective activity. It is also an effective inhibitor of acetylcholinesterase and has attracted interest as a therapeutic candidate for Alzheimer's disease. It has a role as an EC 3.1.1.7 (acetylcholinesterase) inhibitor, a neuroprotective agent, a plant metabolite and a nootropic agent. It is a sesquiterpene alkaloid, a pyridone, a primary amino compound and an organic heterotricyclic compound. It is a conjugate base of a huperzine A(1+).

Pharmacology

Huperzine A has the ability to enhance learning and memory, improve spatial memory, and can be used for age-related dementia, vascular dementia, and other neurodegenerative diseases. Compared with the current anti-AD drugs, huperzine A can go through the blood-brain barrier, with a high oral bioavailability and longer time inhibition on AChE.
As a highly selective AChE reversible inhibitor, huperzine A can inhibit AChE, reduce acetylcholine hydrolysis, and improve the level of acetylcholine in the synaptic gap. This inhibition is reversible, lasts for a long time, shows no drug dependence if repeated administration, and does not induce significant liver toxicity. X-ray diffraction results show that the direct binding of huperzine A to AChE active sites inhibits the binding of AChE to its substrate.
In addition to the potent inhibition on AChE, huperzine A only shows a weak inhibitory effect on the butyrylcholinesterase; also protects neurons by inhibiting oxidative stress, reducing somatostatin, reducing the content of glutamate, decreasing the increased intracellular calcium, and inhibiting neuronal apoptosis; further improves AD-related cognitive function and reduces the symptoms of AD patients.

Clinical Use

Since 1994, huperzine A has been approved for clinical use in improving memory and cognitive impairment in old patients with memory loss and dementia. A large number of domestic clinical studies have found that huperzine A shows therapeutic effect on learning and cognitive dysfunction of vascular dementia, mental retardation, and schizophrenia patients with mild adverse reactions.

(-)-Huperzine A 준비 용품 및 원자재

원자재

준비 용품

(-)-Huperzine A 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Changsha Staherb Natural Ingredients Co., Ltd.	+86-0731-84213302 +8618374838656	sales@staherb.cn	China	1025	58
PNP Biotech Co. Ltd	+8618516098983	sales@pnpbiotech.com	China	1001	58
Sinoway Industrial co., ltd.	0592-5800732; +8613806035118	xie@china-sinoway.com	China	992	58
Henan Bao Enluo International TradeCo.，LTD	+86-17331933971 +86-17331933971	deasea125996@gmail.com	China	2503	58
Wuhan Haorong Biotechnology Co.,ltd	+8618565342920	sales@chembj.net	China	269	58
Shaanxi Haibo Biotechnology Co., Ltd	+undefined18602966907	qinhe02@xaltbio.com	China	1000	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21691	55
Hangzhou FandaChem Co.,Ltd.	008657128800458; +8615858145714	fandachem@gmail.com	China	9348	55
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	32480	60
Shanghai Zheyan Biotech Co., Ltd.	18017610038	zheyansh@163.com	CHINA	3620	58

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