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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.

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Structure Chemical Name CAS MF
2-Methoxycarbonyl-6-methoxycarbonylindole 2-Methoxycarbonyl-6-methoxycarbonylindole
Benzeneacetic acid, 4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-α-ethyl- Benzeneacetic acid, 4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-α-ethyl- 1093759-05-7 C14H13NO4
2-Methylindolin-1-amine 2-Methylindolin-1-amine 31529-46-1 C9H12N2
(1-Methyl-1H-indol-6-yl)methanol (1-Methyl-1H-indol-6-yl)methanol 199590-00-6 C10H11NO
Vat Blue 1, Reduced Vat Blue 1, Reduced 894-86-0 C16H13N2NaO2
1H-Isoindole-1,3(2H)-dione, 2-(3-ethoxy-2-hydroxypropyl)- 1H-Isoindole-1,3(2H)-dione, 2-(3-ethoxy-2-hydroxypropyl)- 859299-02-8 C13H15NO4
Benzeneacetic acid, α-ethyl-3-nitro- Benzeneacetic acid, α-ethyl-3-nitro- 21762-22-1 C10H11NO4
Indole-3-acetic acid sodium salt Indole-3-acetic acid sodium salt 6505-45-9 C10H10NNaO2
6-(Trifluoromethyl)indole 6-(Trifluoromethyl)indole 13544-43-9 C9H6F3N
disulfo-ICG Bis-Thiol disulfo-ICG Bis-Thiol
6-HYDROXY-2-METHYLINDOLE
6-HYDROXY-2-METHYLINDOLE 54584-22-4 C9H9NO
Indobufen Impurity 36 Indobufen Impurity 36
Indobufen Impurity 25 Indobufen Impurity 25
6-BROMO-1H-PYRROLO[3,2-B]PYRIDINE 6-BROMO-1H-PYRROLO[3,2-B]PYRIDINE 944937-53-5 C7H5BrN2
7-Bromo-5-chloro-3-fluoro-1H-indole 7-Bromo-5-chloro-3-fluoro-1H-indole 2763872-86-0 C8H4BrClFN
6-BROMO-4-METHOXYINDOLE 6-BROMO-4-METHOXYINDOLE 393553-57-6 C9H8BrNO
7-Methyl-1H-indole-2-carboxylic acid 7-Methyl-1H-indole-2-carboxylic acid 18474-60-7 C10H9NO2
1-Acetyl-5-bromo-4-chloro-1H-indol-3-yl acetate 1-Acetyl-5-bromo-4-chloro-1H-indol-3-yl acetate 3030-06-6 C12H9BrClNO3
3-chloro-5-Bromo-4-azaindole 3-chloro-5-Bromo-4-azaindole
3-Bromo-6,7-dichloro-1-(phenylsulfonyl)-1H-indole 3-Bromo-6,7-dichloro-1-(phenylsulfonyl)-1H-indole 3022402-93-0 C14H8BrCl2NO2S
6-(Difluoromethyl)-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole 6-(Difluoromethyl)-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole 3027409-00-0 C15H18BF2NO2
6-Bromo-2-iodo-3-isopropyl-1H-indole 6-Bromo-2-iodo-3-isopropyl-1H-indole 2796386-09-7 C11H11BrIN
5-Fluoro-3-iodo-1-(4-methylphenyl)sulfonylindole 5-Fluoro-3-iodo-1-(4-methylphenyl)sulfonylindole 1448959-34-9 C15H11FINO2S
3-FORMYL-4-HYDROXYINDOLE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 3-FORMYL-4-HYDROXYINDOLE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 404888-00-2 C14H15NO4
5,6-DICHLOROINDOLIN-2-ONE 5,6-DICHLOROINDOLIN-2-ONE 71293-59-9 C8H5Cl2NO
5-bromo-6-fluoro-1H-indole 5-bromo-6-fluoro-1H-indole 434960-42-6 C8H5BrFN
2-BROMO-1H-INDOLE 2-BROMO-1H-INDOLE 139409-34-0 C8H6BrN
1-ACETYL-5-BROMO-7-NITROINDOLINE 1-ACETYL-5-BROMO-7-NITROINDOLINE 62368-07-4 C10H9BrN2O3
1H-Indole-3-acetonitrile, a,a-dimethyl- 1H-Indole-3-acetonitrile, a,a-dimethyl- 23078-29-7 C12H12N2
1H-Pyrrolo[2,3-b]pyridine, 4-bromo-6-chloro- 1H-Pyrrolo[2,3-b]pyridine, 4-bromo-6-chloro- 942920-50-5 C7H4BrClN2
5-BROMO-7-CHLORO-1H-INDOLE 5-BROMO-7-CHLORO-1H-INDOLE 180623-89-6 C8H5BrClN
5-Benzyloxyindole-3-acetonitrile 5-Benzyloxyindole-3-acetonitrile 2436-15-9 C17H14N2O
2-Methylindole-3-carboxaldehyde 2-Methylindole-3-carboxaldehyde 5416-80-8 C10H9NO
7-methyl-1H-Indole-2-carboxylic acid methyl ester 7-methyl-1H-Indole-2-carboxylic acid methyl ester 16732-82-4 C11H11NO2
TERT-BUTYL 5-AMINOISOINDOLINE-2-CARBOXYLATE TERT-BUTYL 5-AMINOISOINDOLINE-2-CARBOXYLATE 871013-98-8 C13H18N2O2
2-IODO-1H-INDOLE 2-IODO-1H-INDOLE 26340-49-8 C8H6IN
4-CHLORO-2,3-DIHYDRO-ISOINDOL-1-ONE 4-CHLORO-2,3-DIHYDRO-ISOINDOL-1-ONE 871723-37-4 C8H6ClNO
4-IODO-2-OXYINDOLE 4-IODO-2-OXYINDOLE 179536-52-8 C8H6INO
4-BROMO-7-METHOXY-6-AZAINDOLE 4-BROMO-7-METHOXY-6-AZAINDOLE 425380-37-6 C8H7BrN2O
N-Tosyl-5-bromo-4,7-diazaindole N-Tosyl-5-bromo-4,7-diazaindole 1201186-54-0 C13H10BrN3O2S
6-Fluoro-7-azaindole-3-carboxylic acid 6-Fluoro-7-azaindole-3-carboxylic acid 1190319-97-1 C8H5FN2O2
Methyl 3-Bromo-1-methylindole-6-carboxylate Methyl 3-Bromo-1-methylindole-6-carboxylate 1186663-45-5 C11H10BrNO2
6-Cyano-1H-indole-3-carboxylic acid 6-Cyano-1H-indole-3-carboxylic acid 174500-88-0 C10H6N2O2
1H-Indole-6-carboxylic acid, 4-broMo-, Methyl ester 1H-Indole-6-carboxylic acid, 4-broMo-, Methyl ester 882679-96-1 C10H8BrNO2
6-CHLORO-2,3-DIHYDRO-1H-INDOLE 6-CHLORO-2,3-DIHYDRO-1H-INDOLE 52537-00-5 C8H8ClN
(2-oxo2,3-dihydro-1H-indol-5-yl)boronic acid (2-oxo2,3-dihydro-1H-indol-5-yl)boronic acid 1051316-38-1 C8H8BNO3
4-Fluoroindoline hydrochloride 4-Fluoroindoline hydrochloride 1210147-74-2 C8H9ClFN
2,3-Dihydro-3-(MethoxyphenylMethylene)-2-oxo-1H-indole-6-carboxylic acid Methyl ester 2,3-Dihydro-3-(MethoxyphenylMethylene)-2-oxo-1H-indole-6-carboxylic acid Methyl ester 1160293-22-0 C18H15NO4
5H-Benzo[b]phosphindole, 99% 5H-Benzo[b]phosphindole, 99% 244-87-1 C12H9P
4-Methoxy-1H-indole-2-carboxylic acid Methyl ester 4-Methoxy-1H-indole-2-carboxylic acid Methyl ester 11258-23-4 C11H11NO3
(E)-6-bromo-3-(6-bromo-2-oxoindolin-3-ylidene)indolin-2-one (E)-6-bromo-3-(6-bromo-2-oxoindolin-3-ylidene)indolin-2-one 1351240-72-6 C16H8Br2N2O2
DL-INDOLE-3-LACTIC ACID DL-INDOLE-3-LACTIC ACID 832-97-3 C11H11NO3
METHYL 5-(METHYLSULFONYL)-1H-INDOLE-2-CARBOXYLATE METHYL 5-(METHYLSULFONYL)-1H-INDOLE-2-CARBOXYLATE 205873-28-5 C11H11NO4S
1-Methyl-2-phenylindole 1-Methyl-2-phenylindole 3558-24-5 C15H13N
5,6-Difluoroindole 5,6-Difluoroindole 169674-01-5 C8H5F2N
5,7-Dichloro-1H-indole-2,3-dione 5,7-Dichloro-1H-indole-2,3-dione 6374-92-1 C8H3Cl2NO2
5-CHLORO-1-METHYL-1H-INDOLE-3-CARBOXALDEHYDE 5-CHLORO-1-METHYL-1H-INDOLE-3-CARBOXALDEHYDE 412284-65-2 C10H8ClNO
2-methyl-1H-Indol-1-amine 2-methyl-1H-Indol-1-amine 53406-41-0 C9H10N2
1H-Indole, 5-bromo-3-phenyl- 1H-Indole, 5-bromo-3-phenyl- 54470-19-8 C14H10BrN
1,2,4,5-Benzenetetracarboxylic1,2:4,5-diimide,N,N'-diamino-(8CI) 1,2,4,5-Benzenetetracarboxylic1,2:4,5-diimide,N,N'-diamino-(8CI) 20814-59-9 C10H6N4O4
5,6-DIBENZYLOXYINDOLE 5,6-DIBENZYLOXYINDOLE 4790-19-6 C22H19NO2
5-(2-Chloro-acetyl)-2-hydroxy-benzoic acid methyl ester 5-(2-Chloro-acetyl)-2-hydroxy-benzoic acid methyl ester 33254-87-4 C10H9ClO4
3-Iodo-7-azaindole 3-Iodo-7-azaindole 23616-57-1 C7H5IN2
7-Fluorooxindole 7-Fluorooxindole 71294-03-6 C8H6FNO
2,3,7-TRIMETHYLINDOLE 2,3,7-TRIMETHYLINDOLE 27505-78-8 C11H13N
ETHYL 5-METHOXYINDOLE-2-CARBOXYLATE ETHYL 5-METHOXYINDOLE-2-CARBOXYLATE 4792-58-9 C12H13NO3
7-Methylindole 7-Methylindole 933-67-5 C9H9N
4-BROMO-7-METHOXY-1H-INDOLE 4-BROMO-7-METHOXY-1H-INDOLE 436091-59-7 C9H8BrNO
4-SEC-BUTYL-2,6-DI-TERT-BUTYLPHENOL 4-SEC-BUTYL-2,6-DI-TERT-BUTYLPHENOL 17540-75-9 C18H30O
5-BROMO-6-CHLORO-3-INDOXYL-3-ACETATE 5-BROMO-6-CHLORO-3-INDOXYL-3-ACETATE 102185-48-8 C10H7BrClNO2
Butyric acid producer supply Butyric acid producer supply
5-hydroxyindoleacetic acid standard 5-hydroxyindoleacetic acid standard C10H9NO3
1H-Indole, 1,2-dimethyl-3-(phenylmethyl)- 1H-Indole, 1,2-dimethyl-3-(phenylmethyl)- 19006-15-6 C17H17N
5-bromoindolo[3,2,1-jk]carbazole 5-bromoindolo[3,2,1-jk]carbazole 109589-98-2 C18H10BrN
Tetrazine-ICG Tetrazine-ICG
1-BENZYL-1H-INDOL-5-YLAMINE 1-BENZYL-1H-INDOL-5-YLAMINE 26807-73-8 C15H14N2
1-(TERT-BUTOXYCARBONYL)-5-CHLOROINDOLE& 1-(TERT-BUTOXYCARBONYL)-5-CHLOROINDOLE& 129822-48-6 C13H14ClNO2
5-BROMO-1H-PYRROLO[2 , 3-B]PYRIDIN-2(3H)-ONE 5-BROMO-1H-PYRROLO[2 , 3-B]PYRIDIN-2(3H)-ONE 183208-34-6 C7H5BrN2O
ethyl indoline-6-carboxylate ethyl indoline-6-carboxylate 350683-40-8 C11H13NO2
N-Acetyl-5-fluoro-3-hydroxyindole N-Acetyl-5-fluoro-3-hydroxyindole
5-CHLOROISOINDOLIN-1-ONE 5-CHLOROISOINDOLIN-1-ONE 74572-29-5 C8H6ClNO
6-Nitroindole 6-Nitroindole 4769-96-4 C8H6N2O2
N-ETHYLPHTHALIMIDE N-ETHYLPHTHALIMIDE 5022-29-7 C10H9NO2
IR-61 IR-61 1895075-34-9 C46H44BrClN2O4
1H-Indole-3-carboxylic acid, 4,5,6,7-tetrahydro-2-methyl-7-oxo- 1H-Indole-3-carboxylic acid, 4,5,6,7-tetrahydro-2-methyl-7-oxo- 1032267-56-3 C10H11NO3
Benzeneacetonitrile, α-ethyl-2-nitro- Benzeneacetonitrile, α-ethyl-2-nitro- 1823992-28-4 C10H10N2O2
1-methyl-2-oxo-2,3-dihydro-1H-indole-6-carbonitrile 1-methyl-2-oxo-2,3-dihydro-1H-indole-6-carbonitrile 1255957-68-6 C10H8N2O
2H-Indol-2-one, 1,3-dihydro-1,3-dimethyl-3-[[(4-methylphenyl)sulfonyl]methyl]- 2H-Indol-2-one, 1,3-dihydro-1,3-dimethyl-3-[[(4-methylphenyl)sulfonyl]methyl]- 1446402-55-6 C18H19NO3S
METHYL 4,6,7-TRIMETHOXYINDOLE-2-CARBOXYLATE METHYL 4,6,7-TRIMETHOXYINDOLE-2-CARBOXYLATE 161156-00-9 C13H15NO5
6-BROMO-5-AZAINDOLE 6-BROMO-5-AZAINDOLE 1000342-71-1 C7H5BrN2
1-Methylindole-3-acetonitrile 1-Methylindole-3-acetonitrile 51584-17-9 C11H10N2
3-Methylamine-6-fluoro-1H-indole 3-Methylamine-6-fluoro-1H-indole
3-iodo-5-trifluoromethylindole 3-iodo-5-trifluoromethylindole
4-(2-BroMoethyl)-1,3-dihydro-2H-indolin-2-one 4-(2-BroMoethyl)-1,3-dihydro-2H-indolin-2-one 120427-96-5 C10H10BrNO
7-Bromo-1H-indole, N-BOC protected 7-Bromo-1H-indole, N-BOC protected 868561-17-5 C13H14BrNO2
ICG-CBT ICG-CBT
1H-Indole-2-carboxylic acid, 4-chloro-5-fluoro-, ethyl ester 1H-Indole-2-carboxylic acid, 4-chloro-5-fluoro-, ethyl ester 153500-78-8 C11H9ClFNO2
2-Methylformate-4-methoxy-7-azaindole 2-Methylformate-4-methoxy-7-azaindole
5-Amino-6-chloro-1H-indole 5-Amino-6-chloro-1H-indole
Indobufen Impurity 38 Indobufen Impurity 38 1781917-78-9 C10H12N2
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