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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
1-benzyl-1H-indole-6-carbonitrile(SALTDATA: FREE) 1-benzyl-1H-indole-6-carbonitrile(SALTDATA: FREE) 1030423-43-8 C16H12N2
tert-butyl 6-nitro-1H-indole-1-carboxylate tert-butyl 6-nitro-1H-indole-1-carboxylate 219552-64-4 C13H14N2O4
5-BroMo-6-azaindole 5-BroMo-6-azaindole 1215387-58-8 C7H5BrN2
1H-Indole-3-carbonitrile, 7-broMo- 1H-Indole-3-carbonitrile, 7-broMo- 1043601-50-8 C9H5BrN2
5-METHOXY-1H-INDOLE-2-CARBOXYLIC ACID METHYL ESTER 5-METHOXY-1H-INDOLE-2-CARBOXYLIC ACID METHYL ESTER 67929-86-6 C11H11NO3
1H-Isoindole-5-carboxylic acid, 2,3-dihydro-1-oxo-, Methyl ester 1H-Isoindole-5-carboxylic acid, 2,3-dihydro-1-oxo-, Methyl ester 926307-72-4 C10H9NO3
5-tert-butylisoindoline-1,3-dione 5-tert-butylisoindoline-1,3-dione 50727-07-6 C12H13NO2
Ethyl 5-broMo-1H-indole-7-carboxylate Ethyl 5-broMo-1H-indole-7-carboxylate 1065181-58-9 C11H10BrNO2
2-BroMo-1H-indole-3-carbaldehyde 2-BroMo-1H-indole-3-carbaldehyde 119910-45-1 C9H6BrNO
1,1,2-Trimethyl-1H-benz[e]indole 1,1,2-Trimethyl-1H-benz[e]indole 41532-84-7 C15H15N
6-Nitro-1H-indole-3-carboxylic acid methyl ester 6-Nitro-1H-indole-3-carboxylic acid methyl ester 109175-09-9 C10H8N2O4
7-Aminoindole 7-Aminoindole 5192-04-1 C8H8N2
5-phenyl-5,12- dihydroindolo [3,2-a]carbazole 5-phenyl-5,12- dihydroindolo [3,2-a]carbazole 1247053-55-9 C24H16N2
5H-Benzo[b]phosphindole, 5-phenyl-, 5-oxide 5H-Benzo[b]phosphindole, 5-phenyl-, 5-oxide 1031-13-6 C18H13OP
5-METHYLINDOLINE 5-METHYLINDOLINE 65826-95-1 C9H11N
6-ForMylindolo[3,2-b]carbazole 6-ForMylindolo[3,2-b]carbazole 172922-91-7 C19H12N2O
(5-Bromo-1H-indol-3-yl)-acetic acid methyl ester (5-Bromo-1H-indol-3-yl)-acetic acid methyl ester 117235-22-0 C11H10BrNO2
5-Phenyl-1H-indole-3-carbaldehyde 5-Phenyl-1H-indole-3-carbaldehyde 141835-34-9 C15H11NO
Indolo[3,2,1-jk]carbazole Indolo[3,2,1-jk]carbazole 205-95-8 C18H11N
4-(2-(ethoxycarbonyl)-5-(sulfomethyl)-1H-indol-3-yl)butanoic acid 4-(2-(ethoxycarbonyl)-5-(sulfomethyl)-1H-indol-3-yl)butanoic acid 773839-76-2 C16H19NO7S
2-(1H-indol-3-yl)-1H-indole 2-(1H-indol-3-yl)-1H-indole 27393-85-7 C16H12N2
7-Methoxy-1H-indole 7-Methoxy-1H-indole 3189-22-8 C9H9NO
Indomethacin Indomethacin
2-amino-5-bromo-1H-Indole-3-carboxylic acid 2-amino-5-bromo-1H-Indole-3-carboxylic acid 1784331-41-4 C9H7BrN2O2
5,7-Difluoroindole 5,7-Difluoroindole 301856-25-7 C8H5F2N
6-(2,3,3-TRIMETHYLINDOL-1-YL)-HEXANOIC ACID BROMIDE 6-(2,3,3-TRIMETHYLINDOL-1-YL)-HEXANOIC ACID BROMIDE 171429-43-9 C17H24BrNO2
3-FORMYL-1H-INDOLE-6-CARBONITRILE 3-FORMYL-1H-INDOLE-6-CARBONITRILE 83783-33-9 C10H6N2O
5-BROMOINDOXYL DIACETATE 5-BROMOINDOXYL DIACETATE 33588-54-4 C12H10BrNO3
7-BROMO-1H-INDOLE-3-CARBALDEHYDE 7-BROMO-1H-INDOLE-3-CARBALDEHYDE 115666-21-2 C9H6BrNO
TERT-BUTYL 3-BROMOMETHYL-INDOLE-1-CARBOXYLATE TERT-BUTYL 3-BROMOMETHYL-INDOLE-1-CARBOXYLATE 96551-21-2 C14H16BrNO2
1H-PYRROLO[2,3-B]PYRIDINE-3-CARBONITRILE 1H-PYRROLO[2,3-B]PYRIDINE-3-CARBONITRILE 4414-89-5 C8H5N3
Methyl 2-oxoindole-6-carboxylate Methyl 2-oxoindole-6-carboxylate 14192-26-8 C10H9NO3
Ethyl 6-amino-5-methoxyindole-2-carboxylate Ethyl 6-amino-5-methoxyindole-2-carboxylate 107575-60-0 C12H14N2O3
4,6-Dichloro-1H-indole 4,6-Dichloro-1H-indole 101495-18-5 C8H5Cl2N
diSulfo-ICG Me-tetrazine diSulfo-ICG Me-tetrazine
1-ACETYLINDOLINE 1-ACETYLINDOLINE 16078-30-1 C10H11NO
5-METHOXY-2-METHYL-3-INDOLEACETIC ACID 5-METHOXY-2-METHYL-3-INDOLEACETIC ACID 2882-15-7 C12H13NO3
7-BROMO-2-METHYLINDOLE 7-BROMO-2-METHYLINDOLE 302912-38-5 C9H8BrN
1H-indole-3-propylamine 1H-indole-3-propylamine 6245-89-2 C11H14N2
N-BOC-4-bromo-indole N-BOC-4-bromo-indole
3-Acetyl-2-chloro-1-ethylindole 3-Acetyl-2-chloro-1-ethylindole
6-Carbonyl chloride-1H-indole 6-Carbonyl chloride-1H-indole
6-fluoro-7-bromoindole 6-fluoro-7-bromoindole
8-Methyl-8H-isoxazole-[5,4-B]indole 8-Methyl-8H-isoxazole-[5,4-B]indole
7-Bromo-3-iodo-1H-indole 7-Bromo-3-iodo-1H-indole
2-Methoxycarbonyl-6-methoxycarbonylindole 2-Methoxycarbonyl-6-methoxycarbonylindole
6-Chloro-5-fluoro-2-oxindole 6-Chloro-5-fluoro-2-oxindole 100487-74-9 C8H5ClFNO
ICG Dichlorotriazine ICG Dichlorotriazine
5-Amino-6-fluoro-1H-indole 5-Amino-6-fluoro-1H-indole
3H-Indolium, 5-[(difluoromethyl)sulfonyl]-1,2,3,3-tetramethyl-, iodide (1:1) 3H-Indolium, 5-[(difluoromethyl)sulfonyl]-1,2,3,3-tetramethyl-, iodide (1:1) 53711-60-7 C13H16F2INO2S
5-METHOXY-1-METHYL-1H-INDOLE 5-METHOXY-1-METHYL-1H-INDOLE 2521-13-3 C10H11NO
Indole-2-carboxaldehyde, 7-methyl- (7CI,8CI) Indole-2-carboxaldehyde, 7-methyl- (7CI,8CI) 1796-37-8 C10H9NO
7-bromoindolin-2-one 7-bromoindolin-2-one 320734-35-8 C8H6BrNO
4,7-Dimethylisatin 4,7-Dimethylisatin 15540-90-6 C10H9NO2
Indomethacin manufacturers Indomethacin manufacturers
2-METHYL-5-NITROINDOLE 2-METHYL-5-NITROINDOLE 7570-47-0 C9H8N2O2
5-Cyanoindole 5-Cyanoindole 15861-24-2 C9H6N2
6-(Trifluoromethyl)indole 6-(Trifluoromethyl)indole 13544-43-9 C9H6F3N
Indole-3-acetic acid sodium salt Indole-3-acetic acid sodium salt 6505-45-9 C10H10NNaO2
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
(1-Methyl-1H-indol-6-yl)methanol (1-Methyl-1H-indol-6-yl)methanol 199590-00-6 C10H11NO
2-Methylindolin-1-amine 2-Methylindolin-1-amine 31529-46-1 C9H12N2
Vat Blue 1, Reduced Vat Blue 1, Reduced 894-86-0 C16H13N2NaO2
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-benzyl-1,3-dimethylisoindoline 2-benzyl-1,3-dimethylisoindoline
ICG Thiol, ICG-SH ICG Thiol, ICG-SH
ICG Avidin ICG Avidin
ICG HAS ICG HAS
Indobufen Impurity 36 Indobufen Impurity 36
Indobufen Impurity 25 Indobufen Impurity 25
6-HYDROXY-2-METHYLINDOLE
6-HYDROXY-2-METHYLINDOLE 54584-22-4 C9H9NO
disulfo-ICG Bis-Thiol disulfo-ICG Bis-Thiol
7-Bromo-5-chloro-3-fluoro-1H-indole 7-Bromo-5-chloro-3-fluoro-1H-indole 2763872-86-0 C8H4BrClFN
6-BROMO-1H-PYRROLO[3,2-B]PYRIDINE 6-BROMO-1H-PYRROLO[3,2-B]PYRIDINE 944937-53-5 C7H5BrN2
7-Methyl-1H-indole-2-carboxylic acid 7-Methyl-1H-indole-2-carboxylic acid 18474-60-7 C10H9NO2
6-BROMO-4-METHOXYINDOLE 6-BROMO-4-METHOXYINDOLE 393553-57-6 C9H8BrNO
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
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
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
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
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