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Praziquantel Suppliers list
Company Name:Taizhou Yongfeng Chemical Industry Co., Ltd  Gold
Company Name:Hangzhou Dingyan Chem Co., LTD  Gold
Company Name:Hebei Aopharm Medical Tech Co., Ltd  Gold
Company Name:Suzhou Laihui Biotechnology Co., Ltd.  Gold
Tel:0512-68236973 18013160973
Company Name:Taian Jiaye Biotechnology Co.Ltd  Gold
Tel:0538-6309896 6309702
Praziquantel Basic information
The treatment of schistosomiasis Chemical Properties Uses Production method Category Toxicity grading Acute toxicity Flammability and hazardous characteristics Storage Characteristics Extinguishing agent
Product Name:Praziquantel
Product Categories:Pharmaceutical;API;Cosmetic Ingredients & Chemicals;API's;Aromatics;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;BILTRICIDE;Antiparasitic
Mol File:55268-74-1.mol
Praziquantel Structure
Praziquantel Chemical Properties
Melting point 136-138 C
storage temp. −20°C
Merck 13,7802
EPA Substance Registry System4H-Pyrazino[2,1- a]isoquinolin-4-one, 2-(cyclohexylcarbonyl)-1,2, 3,6,7,11b-hexahydro-(55268-74-1)
Safety Information
Hazard Codes F,C
Risk Statements 11-34
Safety Statements 16-26-36/37/39-45
WGK Germany 1
RTECS UQ4150000
Praziquantel Usage And Synthesis
The treatment of schistosomiasisSchistosomiasis is parasitic disease with both human and animal being prone to get infected. Schistosome has a relative complicated life history. Adult parasites live in the mesenteric vein and portal vein blood of people, cattle, pigs and some other mammals, and therefore humans and these animals are called as the adult host or definitive host.
Praziquantel is a kind of common drugs for treatment of schistosomiasis with an extremely small animal toxicity. After its oral administration, it is rapidly absorbed in the digestive tract. The time of the plasma concentration for reaching peaks: 5 minutes for mice, l5 ~ 30 minutes for rat, 30 to 120 minutes for dogs, and 2 h for sheep. After its absorption this drug is widely distributed in all tissues and organs; it is even able to penetrate through the blood-brain barrier of rats and can also enter into the bile of dogs. It can induce of influx of the Ca 2+ located outside of the schistosome parasite muscle cell membrane, and thus causing muscle contractures and loss of ability of sucking parasite location. At the same time, it also causes deficiency in sugar metabolism and energy metabolism, disrupting the "With immunization" state and then working together with the host immune system for finally eliminating the parasites. Therefore, it has good killing efficacy in treating China branch schistosomiasis, tapeworm, lung fluke, cysticercosis and also immature parasites (cercariae and miracidia).
The common side effects of praziquantel are as follows:
1. during the first 1 hour of medication of the first time: dizziness, headache, nausea, abdominal pain, diarrhea, fatigue, aching limbs can occur, usually at a lesser extent and short duration, and does not affect the treatment without specific treatment.
2. in a few cases, there may be symptoms such as heart palpitations, chest tightness, and T wave change and primary contraction in ECG; supraventricular tachycardia and atrial fibrillation can sometimes also happen.
3. in a few cases there may be a transient increase in transaminases and toxic hepatitis.
4. it sometimes can induce mental disorders and gastrointestinal bleeding.
5. hernia, allergic reactions (rash, asthma), etc. are also seen.
Chemical PropertiesIt is white or almost white crystalline powder; it is odorless with a slightly bitter taste. It also has hygroscopic effect. Solubility (g/100m1): 9.7 in ethanol, 56.7 in chloroform, and 0.04 in water. It is easily soluble in dimethyl sulfoxide (DMSO), but insoluble in ether. It has a melting point of 136 ~ 141 ℃. Acute toxicity LD50 in mice and rats (mg/kg): 2000 ~ 3000 oral administration,> 3,000 subcutaneously injection.
UsesIt is a kind of broad-spectrum anti-parasitic disease drug. It can be used for the treatment and prevention of schistosomiasis, cysticercosis, paragonimiasis, hydatid disease, fasciolopsiasis, hydatid disease, and worm infection.
It can also be used as anthelmintic and is effective in treating animal gastrointestinal nematodes. It can be mixed in the feed for application.
The product is a kind of anthelmintic drug effective in treating Schistosoma japonicum, Schistosoma mansoni and Schistosoma haematobium, Clonorchis sinensis, Paragonimus westermani, fasciolopsis buski, tapeworms and cysticercosis. It has a especially strong killing effect on tapeworm and is currently of highest efficiency among anti-schistosomiasis drug.
It is a kind of anthelmintics drug mainly used for treating schistosomiasis. It can also used for treating Fahrenheit schistosomiasis, taeniasis, paragonimiasis, and cysticercosis
Production methodThere are a variety of synthetic routes (isoquinoline route, piperazine route, and phenethylamine route). Isoquinoline has advantages such as wide sources of initial raw material and low cost. Isoquinoline can be converted to 1-benzoyl-2-cyano-1,2-dihydro-isoquinoline through Reissetr reaction. It is further converted to 1-benzoyl-aminomethyl-1, 2, 3, 4-tetrahydroisoquinoline through pressurized hydrogenation. Then followed by cyclization with chloroacetyl chloride to give 2-benzoyl-1,3, 4,6,7,11b-hexahydro-2H-pyrazino[2,1-b]isoquinolin-4-ketone. Finally, apply phosphoric acid hydrolysis and perform condensation reaction with cyclohexanecarboxylic acid chloride to obtain the final product.
There are a variety of synthetic routes for industrial production including isoquinoline route, piperazine route, and phenethylamine route, among which the isoquinoline route is the best. In this route, first perform adduct reaction between isoquinoline and benzoyl chloride as well as potassium cyanide, further go through catalytic hydrogenation and rearrangement to generate 1-benzoyl-methyl-amino-1,2,3,4-tetrahydroisoquinoline, and then sequentially go through chlorine acetylation, cyclization, hydrolysis under increased pressure, and cyclohexanone acylation to generate the final product.
Take phenethylamine as the raw material, after acylation through chloroacetyl chloride, further introduce the amino group after adding terephthalamide potassium for amination reaction, then have cyclization reaction in the action of phosphorus oxychloride to give 3,4-dihydroisoquinoline derivative; further go through hydrogenation and hydrolysis to obtain 1-aminomethyl-tetrahydroquinoline; successively use cyclohexane carboxylic acid chloride and chloroacetyl chloride for acylation and finally go through dehydrochlorination and cyclization to obtain praziquantel.
You can alternatively use isoquinoline as raw material; it first go through Reissert reaction to introduce a cyano group in l position and have nitrogen benzoylated, followed by hydrogenation while benzoyl group is transferred to the amino group of the side chain, further introduce a chlorine acetyl group to the amino group on the ring, then successively go through cyclization, hydrolysis, cyclohexanone formylation to obtain praziquantel.
The above information is edited by the chemicalbook of Dai Xiongfeng.
CategoryToxic substances
Toxicity gradingPoisoning
Acute toxicityOral rat LD50; 2840 mg / kg; Oral - Mouse LD50: 2454 mg / kg.
Flammability and hazardous characteristicsCombustible; combustion produces toxic fumes of nitrogen oxides.
Storage Characteristicsventilation, low-temperature, and drying.
Extinguishing agentDry powder, foam, sand, carbon dioxide, water spray.
Chemical PropertiesWhite Solid
Usageanthelmintic; EMBAY-8440
UsageAnthelmintic, effective against flatworms.
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