午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

Heterocyclic compound

Heterocyclic compounds are a class of organic compounds with cyclic structure. The ring-constituting atoms in the molecule, in addition to carbon, also include one or more nitrogen, sulfur, oxygen and other atoms. Those containing one ring are called single-heterocyclic compounds, such as furan, thiazole, and pyridine. Those containing two or more rings are called fused heterocyclic compounds such as quinoline and purine. The most common and most stable are five- or six-membered heterocyclic ring. Simple heterocyclic ring is capable of merging with benzene or another heterocyclic ring to form a bicyclic, tricyclic or more complex ring system. Some kinds of heterocyclic rings have features of aromatic compounds, such as being easy to participate into substitution reaction, difficult to have addition reaction and being stable to oxidant. Heterocyclic compounds are widely found in nature, such as nucleic acids, most kinds of vitamins, chlorophyll, heme, most kinds of alkaloids, pigments and so on. A fraction of the heterocyclic compounds have aromatic characteristics, such as plants coumarone, jasmonate and animals civetone. There are many synthetic pesticides that belong to such compounds such as herbicides atrazine, amitrole, CMPT, insecticide fluorine propargite, quinoline parathion, thioquinox and so on. Simple heterocyclic compound is an important raw material of organic chemical industry.

The cyclic compounds with atoms constituting the ring system, in addition to carbon atom, also containing O, S, and N heteroatom are collectively referred to as heterocyclic compounds. According to this definition, the cyclic dicarboxylic anhydride, the cyclic imide, lactones, lactides, cyclic anhydrides, lactams, and cyclic ethers, strictly speaking, also belong to heterocyclic compounds. However, due to the nature of these compounds are similar with aliphatic compound, and can easily undergo either the cyclization of the open-chain compounds or ring open reaction to be transformed into chain compounds, thus being generally attributed to the aliphatic chemistry for discussion. Therefore, heterocyclic compounds generally refer specifically to those heterocyclic compounds with relatively stable ring system but different levels of aromatic properties, namely aromatic heterocyclic compound.

The organic heterocyclic compounds belong to a large class in the three large categories of organic compounds, open chain, carbocyclic and heterocyclic organic compounds. It contains various kinds and has a large number accounting for about one-third of all known organic compounds and is also widespread in the biosphere, having close relation with the biological growth, development, reproduction, and genetic variation and so on. Common heterocyclic compounds include furan, thiophene, pyrrole, pyridine, quinoline, carbazole and so on.

These kinds of heterocyclic compounds are widely used in organic synthesis or as pharmaceuticals, pesticides, solvents and so on. They are colorless liquids with special smell or crystallization and have specific gravity being less than or close to water. They are toxic and can be soluble in some organic solvents and slightly soluble in water. In case of fire, heat, oxidants and strong acids, it can cause fire or explosion with simultaneous deposition of toxic sulfur dioxide or nitrogen oxide gas. Furan, when being exposed to the air, is capable of forming peroxides with causing an explosion during distillation. In the management of dangerous goods, according to the risk grades of fire, explosion, toxicity risk, they were classified as flammable liquids, flammable solids and organic toxic chemicals; when used in the reservoir, the first two comply danger of the A and B class while the latter one is based on class C fire danger for conducting fire management. In case of fire, we can use foam, dry powder, water mist, 1211 and carbon dioxide for fire extinguishing agents.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
1H-Pyrrolo[3,2-b]pyridine,7-methyl-(9CI) 1H-Pyrrolo[3,2-b]pyridine,7-methyl-(9CI) 357263-42-4 C8H8N2
2-Pyridinemethanamine,alpha-cyclopropyl-(9CI) 2-Pyridinemethanamine,alpha-cyclopropyl-(9CI) 535925-68-9 C9H12N2
2-Pyridinemethanamine,3-fluoro-(9CI) 2-Pyridinemethanamine,3-fluoro-(9CI) 312904-51-1 C6H7FN2
4-IODOISOQUINOLINE 4-IODOISOQUINOLINE 55270-33-2 C9H6IN
1-Piperazinepropanoicacid,methylester(9CI) 1-Piperazinepropanoicacid,methylester(9CI) 43032-40-2 C8H16N2O2
3-Pyridinemethanamine,6-amino-(9CI) 3-Pyridinemethanamine,6-amino-(9CI) 156973-09-0 C6H9N3
2-Pyridinesulfonamide,4-methyl-(9CI) 2-Pyridinesulfonamide,4-methyl-(9CI) 65938-78-5 C6H8N2O2S
6-BROMO-5-IODOPYRIDIN-3-OL 6-BROMO-5-IODOPYRIDIN-3-OL 697300-70-2 C5H3BrINO
2-Methylthieno[2,3-d]thiazole 2-Methylthieno[2,3-d]thiazole 61612-02-0 C6H5NS2
(6-BROMO-PYRIDIN-3-YL)-ACETONITRILE (6-BROMO-PYRIDIN-3-YL)-ACETONITRILE 144873-99-4 C7H5BrN2
3-BROMO-6-METHYLPICOLINONITRILE 3-BROMO-6-METHYLPICOLINONITRILE C7H5BrN2
2-HYDRAZINOISONICOTINIC ACID 2-HYDRAZINOISONICOTINIC ACID 887589-25-5 C6H7N3O2
6-TERT-BUTYL-4-METHYLCOUMARIN 6-TERT-BUTYL-4-METHYLCOUMARIN 17874-32-7 C14H16O2
NIMODIPINE RELATED COMPOUND A (50 MG) (2-METHOXYETHYL  1-METHYLETHYL 2,6-DIMETHYL-4-(3-NITROPHENYL)PYRIDINE-3,5-DICARBOXYLATE) NIMODIPINE RELATED COMPOUND A (50 MG) (2-METHOXYETHYL 1-METHYLETHYL 2,6-DIMETHYL-4-(3-NITROPHENYL)PYRIDINE-3,5-DICARBOXYLATE) 85677-93-6 C21H24N2O7
1-(5-Ethylpyridin-2-yl)ethane-1,2-diol 1-(5-Ethylpyridin-2-yl)ethane-1,2-diol 646519-83-7 C9H13NO2
Benzoic acid, 3-[(6-amino-3-pyridazinyl)methyl]-, methyl ester Benzoic acid, 3-[(6-amino-3-pyridazinyl)methyl]-, methyl ester 874338-90-6 C13H13N3O2
2-chloro-4-pyridone 2-chloro-4-pyridone 17228-67-0 C5H4ClNO
3-Bromo-5-Chloro-2-Picoline 3-Bromo-5-Chloro-2-Picoline 131036-39-0 C6H5BrClN
N-[4-[(2-Amino-3-chloropyridin-4-yl)oxy]-3-fluorophenyl]-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide N-[4-[(2-Amino-3-chloropyridin-4-yl)oxy]-3-fluorophenyl]-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide 1025720-94-8 C25H19ClF2N4O4
2,4-DiMethoxy-5H-pyrrolo[3,2-d]pyriMidine 2,4-DiMethoxy-5H-pyrrolo[3,2-d]pyriMidine 84538-40-9 C8H9N3O2
7,8-dihydro-8-oxo-7-phenyl-pyrido[2,3-d]pyridazine-5-carboxylic acid 7,8-dihydro-8-oxo-7-phenyl-pyrido[2,3-d]pyridazine-5-carboxylic acid 13694-12-7 C14H9N3O3
[1-(6-Chloro-pyridazin-3-yl)-piperidin-3-yl]-Methanol [1-(6-Chloro-pyridazin-3-yl)-piperidin-3-yl]-Methanol 939986-07-9 C10H14ClN3O
3-Chloro-6-(piperidin-3-ylMethoxy)-pyridazine hydrochloride 3-Chloro-6-(piperidin-3-ylMethoxy)-pyridazine hydrochloride 1185311-75-4 C10H15Cl2N3O
4-(pyridin-2-yl)-2-(trifluoroMethyl)pyriMidine 4-(pyridin-2-yl)-2-(trifluoroMethyl)pyriMidine 1269293-96-0 C10H6F3N3
6-fluoropyridine-3-sulfonyl chloride 6-fluoropyridine-3-sulfonyl chloride 1025509-80-1 C5H3ClFNO2S
2,4,6-trichloro-5-isopropylpyriMidine 2,4,6-trichloro-5-isopropylpyriMidine 1780-42-3 C7H7Cl3N2
2,5-DiaMinopyridine hydrochloride 2,5-DiaMinopyridine hydrochloride 119261-84-6 C5H8ClN3
ALPHA-PYRIDOIN ALPHA-PYRIDOIN 1141-06-6 C12H10N2O2
4-ETHOXYPYRIDINE 4-ETHOXYPYRIDINE 33399-46-1 C7H9NO
ETHYL-2-PIPERAZINECARBOXYLATE ETHYL-2-PIPERAZINECARBOXYLATE 89941-07-1 C7H14N2O2
3-CYANO-6,7-DIMETHYLCHROMONE 3-CYANO-6,7-DIMETHYLCHROMONE 94978-86-6 C12H9NO2
4-CHLORO-N,N-DIMETHYL-PYRIDINE-2-CARBOXAMIDE 4-CHLORO-N,N-DIMETHYL-PYRIDINE-2-CARBOXAMIDE 114780-06-2 C8H9ClN2O
2-(1-PYRROLIDINYL)NICOTINIC ACID 2-(1-PYRROLIDINYL)NICOTINIC ACID 690632-36-1 C10H12N2O2
(5-METHYLPYRIDIN-3-YL)METHANOL (5-METHYLPYRIDIN-3-YL)METHANOL 102074-19-1 C7H9NO
1-BENZYLPIPERAZINE 1-BENZYLPIPERAZINE 2759-17-3 C17H18N4S
3-NITRO-2-PYRIDINESULFENYL CHLORIDE 3-NITRO-2-PYRIDINESULFENYL CHLORIDE 68206-45-1 C5H3ClN2O2S
4-AMINO-2-(TRIFLUOROMETHYL)PYRIMIDINE-5-CARBONITRILE 4-AMINO-2-(TRIFLUOROMETHYL)PYRIMIDINE-5-CARBONITRILE C6H3F3N4
2-ETHOXY-4-PYRIDINECARBOXYLIC ACID 2-ETHOXY-4-PYRIDINECARBOXYLIC ACID 91940-86-2 C8H9NO3
DIBENZOTHIOPHENE-D8 DIBENZOTHIOPHENE-D8 33262-29-2 C12H8S
3-Chloro-2,4-difluoropyridine 3-Chloro-2,4-difluoropyridine 851179-01-6 C5H2ClF2N
5-Methylpyrimidine 5-Methylpyrimidine C5H6N2
2-Chloro-3-Bromopyridine-4-Boronic acid 2-Chloro-3-Bromopyridine-4-Boronic acid C5H4BBrClNO2
2-AMINO-3-CHLORO-5-FLUOROPYRIDINE 2-AMINO-3-CHLORO-5-FLUOROPYRIDINE 1214330-79-6 C5H4ClFN2
Ethanol, 2-(3-pyridinyloxy)- (9CI) Ethanol, 2-(3-pyridinyloxy)- (9CI) 119967-49-6 C7H9NO2
Isoxazolo[5,4-c]pyridin-3-amine (9CI) Isoxazolo[5,4-c]pyridin-3-amine (9CI) 114080-94-3 C6H5N3O
Methyl-3-(2-thienyl)=propionate Methyl-3-(2-thienyl)=propionate 16862-05-8 C8H10O2S
2-Pyrimidinamine, 4,5,6-trimethyl- (9CI) 2-Pyrimidinamine, 4,5,6-trimethyl- (9CI) 54568-11-5 C7H11N3
2-Pyrimidinamine, N,N-dimethyl- (9CI) 2-Pyrimidinamine, N,N-dimethyl- (9CI) 5621-02-3 C6H9N3
4(1H)-Pyrimidinone, 2-amino-6-mercapto- (9CI) 4(1H)-Pyrimidinone, 2-amino-6-mercapto- (9CI) 6973-81-5 C4H5N3OS
2(1H)-Pyridinone, 3-(aminomethyl)-4,6-dimethyl- (9CI) 2(1H)-Pyridinone, 3-(aminomethyl)-4,6-dimethyl- (9CI) 771579-27-2 C8H12N2O
2-chloro-5-phenyl-4-(piperidin-1-yl)pyrimidine 2-chloro-5-phenyl-4-(piperidin-1-yl)pyrimidine 901303-38-6 C15H16ClN3
4,6-DIMETHOXY-2-PIPERIDIN-4-YLPYRIMIDINE
4,6-DIMETHOXY-2-PIPERIDIN-4-YLPYRIMIDINE 849924-99-8 C11H17N3O2
5-Chloro-2-fluoro—4-picoline 5-Chloro-2-fluoro—4-picoline
3H-Pyrido(3,4-b)indole, 4,9-dihydro- 3H-Pyrido(3,4-b)indole, 4,9-dihydro- 4894-26-2 C11H10N2
1,6-Dihydro-4-hydroxy-2-methyl-6-(oxo)nicotinic acid ethyl ester 1,6-Dihydro-4-hydroxy-2-methyl-6-(oxo)nicotinic acid ethyl ester 3950-10-5 C9H11NO4
3-ACETYL-BENZOIC ACID METHYL ESTER 3-ACETYL-BENZOIC ACID METHYL ESTER 915402-27-6 C8H7N3O
(5-BROMO-PYRIMIDIN-2-YLOXY)-ACETIC ACID (5-BROMO-PYRIMIDIN-2-YLOXY)-ACETIC ACID 270912-79-3 C6H5BrN2O3
2-AMINO-4-CHLOROPYRIMIDINE-5-CARBOXALDEHYDE 2-AMINO-4-CHLOROPYRIMIDINE-5-CARBOXALDEHYDE 848697-17-6 C5H4ClN3O
(2,5-DIFLUOROPYRIDIN-3-YL)BORONIC ACID (2,5-DIFLUOROPYRIDIN-3-YL)BORONIC ACID 872041-95-7 C5H4BF2NO2
ETHYL 6-BROMOPYRAZOLO[1,5-A]PYRIMIDINE-2-CARBOXYLATE ETHYL 6-BROMOPYRAZOLO[1,5-A]PYRIMIDINE-2-CARBOXYLATE 1005209-42-6 C9H8BrN3O2
3-PYRIDINAMINE, 6-CHLORO-5-IODO- 3-PYRIDINAMINE, 6-CHLORO-5-IODO- 444902-32-3 C5H4ClIN2
5-(1-Aminoethyl)pyrimidin-2-amine 5-(1-Aminoethyl)pyrimidin-2-amine 1208514-29-7 C6H10N4
Ethyl 4-chloropyrrolo[2,3-d]pyrimidine-2-carboxylate Ethyl 4-chloropyrrolo[2,3-d]pyrimidine-2-carboxylate C9H8ClN3O2
6-Chloropyridine-2-carboxylic acid amide 6-Chloropyridine-2-carboxylic acid amide 7059-61-2 C24H16F2O2
5-nitropyrimidine-2-carboxylicacid 5-nitropyrimidine-2-carboxylicacid 1086393-02-3 C5H3N3O4
2-Hydroxy-5-methyl-benzaldehyde 2-Hydroxy-5-methyl-benzaldehyde 859926-11-7 C10H8N2.C8H8O2
6-Bromo-2,3-dihydroimidazo[1,2-a]pyridine 6-Bromo-2,3-dihydroimidazo[1,2-a]pyridine 793628-63-4 C7H7BrN2
Isopropyl 3-pyridazinone-6-carboxylate Isopropyl 3-pyridazinone-6-carboxylate 63001-33-2 C8H10N2O3
5-(4-Aminophenyl)-2,4-pyrimidinediamine 5-(4-Aminophenyl)-2,4-pyrimidinediamine 71552-29-9 C10H11N5
4,6-Dichloro-3-methyl-isoxazolo[5,4-d]pyrimidine 4,6-Dichloro-3-methyl-isoxazolo[5,4-d]pyrimidine 1253654-79-3 C6H3Cl2N3O
6-Methoxy-2-(tributylstannyl)pyrimidine 6-Methoxy-2-(tributylstannyl)pyrimidine 850501-35-8 C17H32N2OSn
2-methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine 2-methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine 1052686-60-8 C11H17BN2O3
Ethyl 1,4-diazepane-1-carboxylate ,97% Ethyl 1,4-diazepane-1-carboxylate ,97% 18739-39-4 C8H16N2O2
4-Chloro-2-methyl-6-(methylthio)pyrimidine 4-Chloro-2-methyl-6-(methylthio)pyrimidine 867131-59-7 C6H7ClN2S
Dichloro[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](benzylidene)bis(3-bromopyridine)ruthenium(II) Dichloro[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](benzylidene)bis(3-bromopyridine)ruthenium(II) 900169-53-1 C38H39Br2Cl2N4Ru
Pyrimidine, 4,5-dichloro-2-(methylthio)- Pyrimidine, 4,5-dichloro-2-(methylthio)- 99469-85-9 C5H4Cl2N2S
(2,4-Dichloro-pyrimidin-5-ylmethyl)-ethyl-amine (2,4-Dichloro-pyrimidin-5-ylmethyl)-ethyl-amine 1289386-18-0 C7H9Cl2N3
2-Chloro-4-ethoxymethyl-pyrimidine 2-Chloro-4-ethoxymethyl-pyrimidine 1289385-59-6 C7H9ClN2O
4-Chloro-2-ethoxy-5-methyl-pyrimidine 4-Chloro-2-ethoxy-5-methyl-pyrimidine 1289384-90-2 C7H9ClN2O
5-Chloro-2-ethoxy-pyrimidine 5-Chloro-2-ethoxy-pyrimidine 1289386-43-1 C6H7ClN2O
5-Bromo-6-chloro-2-(methylthio)-4-pyrimidinamine 5-Bromo-6-chloro-2-(methylthio)-4-pyrimidinamine 63931-22-6 C5H5BrClN3S
3-Bromo-2-chloro-4-methyl-5-nitropyridine 3-Bromo-2-chloro-4-methyl-5-nitropyridine 1049706-73-1 C6H4BrClN2O2
4-bromo-6-chloropicolinic acid 4-bromo-6-chloropicolinic acid 1060805-66-4 C6H3BrClNO2
3-Ethyl Pyridazine 3-Ethyl Pyridazine 28200-51-3 C6H8N2
6-(Boc-amino)-3-pyridazinecarboxylic Acid 6-(Boc-amino)-3-pyridazinecarboxylic Acid 301548-08-3 C10H13N3O4
133391-63-6 133391-63-6 133391-63-6
GSK269962A GSK269962A 850664-21-0 C29H30N8O5
3,6-dichloro-4-hydrazinopyridazine 3,6-dichloro-4-hydrazinopyridazine C4H4Cl2N4
DiMethyl 2-(2-PyriMidyl)Malonate DiMethyl 2-(2-PyriMidyl)Malonate 93271-75-1 C9H10N2O4
2-chloro-3-(trifluoroMethyl)-4-iodopyridine 2-chloro-3-(trifluoroMethyl)-4-iodopyridine 1227603-55-5 C6H2ClF3IN
2,3,6-Trichloro-5-nitro-pyridine 2,3,6-Trichloro-5-nitro-pyridine 55304-72-8 C5HCl3N2O2
3-Bromoquinolin-5-amine 3-Bromoquinolin-5-amine 116632-57-6 C9H7BrN2
2,6-Bis[1-[(2,6-diMethylphenyl)iMino]ethyl]pyridine 2,6-Bis[1-[(2,6-diMethylphenyl)iMino]ethyl]pyridine 204203-16-7 C25H27N3
5-BroMo-4-hydroxynicotinic acid 5-BroMo-4-hydroxynicotinic acid 1052114-83-6 C6H4BrNO3
 Alpelisib (BYL719) Alpelisib (BYL719) 1217486-61-7 C19H22F3N5O2S
2-benzyl-5-chloro-4-iodopyridazin-3(2H)-one 2-benzyl-5-chloro-4-iodopyridazin-3(2H)-one 1345839-70-4 C11H8ClIN2O
N-(3,5-Dichloro-4-pyridinyl)-3,4-bis(difluoroMethoxy)benzaMide N-(3,5-Dichloro-4-pyridinyl)-3,4-bis(difluoroMethoxy)benzaMide 162401-30-1 C14H8Cl2F4N2O3
Ethyl 5-isoquinolinecarboxylate Ethyl 5-isoquinolinecarboxylate 58794-08-4 C12H11NO2
2-Iodobenzothiophene 2-Iodobenzothiophene C8H5IS
4-AMINO-5-BROMO-2-PYRIMIDINOL 4-AMINO-5-BROMO-2-PYRIMIDINOL C4H4BrN3O
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.