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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
1H-Indazol-6-amine, 3-chloro-1-methyl- 1H-Indazol-6-amine, 3-chloro-1-methyl- 189559-98-6 C8H8ClN3
1H-Indole-2-carboxylic acid, 6-hydroxy-1-methyl- 1H-Indole-2-carboxylic acid, 6-hydroxy-1-methyl- 541522-89-8 C10H9NO3
6-Methoxyindole 6-Methoxyindole 3189-13-7 C9H9NO
1H-Isoindole-1,3(2H)-dione, 2-(4-propylphenyl)- 1H-Isoindole-1,3(2H)-dione, 2-(4-propylphenyl)- 19357-17-6 C17H15NO2
7-Bromo-6-chloro-5-methyl-1H-indole 7-Bromo-6-chloro-5-methyl-1H-indole
5-Bromo-4,7-dimethoxy-1H-indole 5-Bromo-4,7-dimethoxy-1H-indole 2410249-78-2 C10H10BrNO2
2-Propenoic acid, 2-methyl-, 1,1'-(1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2'-[2H]indole]-5',8-diyl) ester 2-Propenoic acid, 2-methyl-, 1,1'-(1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2'-[2H]indole]-5',8-diyl) ester 1581285-94-0 C27H26N2O7
4-(2-Chlorophenyl)-1-methyl-2,3,4,9-tetrahydro-1h-pyrido[3,4-b]indole 4-(2-Chlorophenyl)-1-methyl-2,3,4,9-tetrahydro-1h-pyrido[3,4-b]indole 885460-08-2 C18H17ClN2
methyl indoline-5-carboxylate methyl indoline-5-carboxylate 141452-01-9 C10H11NO2
ICG Biotin,ICG-Biotin ICG Biotin,ICG-Biotin
ICG-HES-SS-DOX ICG-HES-SS-DOX
trisulfo-ICG carboxylic acid/COOH trisulfo-ICG carboxylic acid/COOH
4-hydroxy-N,N-diisopropylindole-3-ethylamine hydrochloride 4-hydroxy-N,N-diisopropylindole-3-ethylamine hydrochloride C16H25ClN2O
1H-Indazole-3-carbonitrile, 5-amino-1-methyl- 1H-Indazole-3-carbonitrile, 5-amino-1-methyl- 1541255-62-2 C9H8N4
7-CHLORO-1H-INDOLE-3-CARBOXYLIC ACID
7-CHLORO-1H-INDOLE-3-CARBOXYLIC ACID 86153-24-4 C9H6ClNO2
15N, 96-99%) 15N, 96-99%) 1337952-53-0
1H-Indole-3-aceticacid,4-bromo-(9CI) 1H-Indole-3-aceticacid,4-bromo-(9CI) 89245-41-0 C10H8BrNO2
1H-Indole-1-carboxylic acid, 3-(hydroxymethyl)-4-methyl-, 1,1-dimethylethyl ester 1H-Indole-1-carboxylic acid, 3-(hydroxymethyl)-4-methyl-, 1,1-dimethylethyl ester 1260766-73-1 C15H19NO3
trimethylol diindole trimethylol diindole
1-ACETYL-5-BROMOINDOLE 1-ACETYL-5-BROMOINDOLE 61995-52-6 C10H8BrNO
6-Methyl-5-nitro-7-azaindole 6-Methyl-5-nitro-7-azaindole
tert-butyl 6-methoxy-1H-pyrrolo[3,2-b]pyridine-1-carboxylate tert-butyl 6-methoxy-1H-pyrrolo[3,2-b]pyridine-1-carboxylate 2271054-06-7 C13H16N2O3
5-Methyl-4,5,6,7-tetrahydro-1H-indole 5-Methyl-4,5,6,7-tetrahydro-1H-indole 128277-88-3 C9H13N
5-Fluoro-3-(trifluoromethyl)-3-((trimethylsilyl)oxy)indoline 5-Fluoro-3-(trifluoromethyl)-3-((trimethylsilyl)oxy)indoline 3023538-78-2 C12H15F4NOSi
indolo(3,2-b)carbazole indolo(3,2-b)carbazole 241-55-4 C18H10N2
3,5-Dimethylindole 3,5-Dimethylindole
3-[((2R)-1-METHYLPYRROLIDIN-2-YL)METHYL]-5-[(E)-2-(PHENYLSULFONYL)VINYL]INDOLE 3-[((2R)-1-METHYLPYRROLIDIN-2-YL)METHYL]-5-[(E)-2-(PHENYLSULFONYL)VINYL]INDOLE 180637-89-2 C22H24N2O2S
1-BENZYL HYDROGEN (S)-4-PHTHALIMIDOGLUTARATE 1-BENZYL HYDROGEN (S)-4-PHTHALIMIDOGLUTARATE 88784-33-2 C20H17NO6
5-Fluoroindoline 5-Fluoroindoline 2343-22-8 C8H8FN
1H-INDOLE-4-ETHANAMINE 1H-INDOLE-4-ETHANAMINE 16176-73-1 C10H12N2
tert-butyl 3-(2-methoxy-2-oxoethyl)-1H-indole-1-carboxylate tert-butyl 3-(2-methoxy-2-oxoethyl)-1H-indole-1-carboxylate 370562-34-8 C16H19NO4
ethyl 5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylate ethyl 5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylate 800401-67-6 C10H9ClN2O2
4-(4-Bromo-phenyl)-pyridine 4-(4-Bromo-phenyl)-pyridine 39795-60-3 C11H8BrN
4-METHYL-1H-INDOLE-2-CARBOXYLIC ACID 4-METHYL-1H-INDOLE-2-CARBOXYLIC ACID 18474-57-2 C10H9NO2
4-METHYLINDOLE-3-CARBOXYLIC ACID 4-METHYLINDOLE-3-CARBOXYLIC ACID 858515-65-8 C10H9NO2
5-BROMO-3-FORMYLINDOLE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 5-BROMO-3-FORMYLINDOLE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 325800-39-3 C14H14BrNO3
4-bromo-1H-indole-2-carboxylic acid 4-bromo-1H-indole-2-carboxylic acid 16732-64-2 C9H6BrNO2
5-BROMO-3-INDOXYL CAPRYLATE 5-BROMO-3-INDOXYL CAPRYLATE 133950-69-3 C16H20BrNO2
1-Methyl-3-nitro-1H-indole 1-Methyl-3-nitro-1H-indole 36728-89-9 C9H8N2O2
6-IODOINDOLE 6-IODOINDOLE 115666-47-2 C8H6IN
1H-INDOLE-1-CARBOXYLIC ACID,2,3-DIHYDRO-6-HYDROXY-,1,1-DIMETHYLETHYL ESTER 1H-INDOLE-1-CARBOXYLIC ACID,2,3-DIHYDRO-6-HYDROXY-,1,1-DIMETHYLETHYL ESTER 957204-30-7 C13H17NO3
N-Methyl-5-bromo-4,7-diazaindole N-Methyl-5-bromo-4,7-diazaindole 1217090-32-8 C7H6BrN3
3-Cyano-1H-indole-5-carboxylic acid 3-Cyano-1H-indole-5-carboxylic acid 889942-87-4 C10H6N2O2
3-oxoisoindoline-5-carbonitrile 3-oxoisoindoline-5-carbonitrile 1261726-80-0 C9H6N2O
3-Bromoindole-5-carboxylic Acid 3-Bromoindole-5-carboxylic Acid 916179-87-8 C9H6BrNO2
4,5,6,7-Tetrahydro-4-oxo-1H-indole-1-carboxylic acid 1,1-dimethylethyl ester 4,5,6,7-Tetrahydro-4-oxo-1H-indole-1-carboxylic acid 1,1-dimethylethyl ester 877170-76-8 C13H17NO3
4-BROMO-6-FLUORO (1H)INDAZOLE 4-BROMO-6-FLUORO (1H)INDAZOLE 885520-70-7 C8H5BrFN
1-(1H-Indol-3-yl)-2-morpholin-4-yl-2-oxoethanone 1-(1H-Indol-3-yl)-2-morpholin-4-yl-2-oxoethanone 5625-89-8 C14H14N2O3
N-Boc-5-Methoxy-7-Methylindole, 97% N-Boc-5-Methoxy-7-Methylindole, 97% 1387445-50-2 C15H19NO3
2-broMoindolo[3,2,1-jk]carbazole 2-broMoindolo[3,2,1-jk]carbazole 1174032-81-5 C18H10BrN
Methanone, (4-broMophenyl)(3-chloro-1H-indol-7-yl)- Methanone, (4-broMophenyl)(3-chloro-1H-indol-7-yl)- 91714-51-1 C15H9BrClNO
5-broMo-7-fluoro-1,2-dihydrocyclopenta[b]indol-3(4H)-one 5-broMo-7-fluoro-1,2-dihydrocyclopenta[b]indol-3(4H)-one 869194-30-9 C11H7BrFNO
4,5,6,7-Tetrahydro-1H-indazole-3-carboxamide 4,5,6,7-Tetrahydro-1H-indazole-3-carboxamide 1069763-49-0 C8H11N3O
4-Chloro-2-(4-chlorobenzoyl)-1-(4-Methoxyphenyl)hydrazide Benzoic Acid 4-Chloro-2-(4-chlorobenzoyl)-1-(4-Methoxyphenyl)hydrazide Benzoic Acid 402849-27-8 C21H16Cl2N2O3
7-Benzyloxyindoline 7-Benzyloxyindoline 191730-78-6 C15H15NO
isoindolin-4-ol hydrochloride isoindolin-4-ol hydrochloride 72695-20-6 C8H10ClNO
6-Chloro-4-methoxyindole 6-Chloro-4-methoxyindole 117970-23-7 C9H8ClNO
3-(2-chloropyriMidin-4-yl)-1H-indole 3-(2-chloropyriMidin-4-yl)-1H-indole 945016-63-7 C12H8ClN3
tert-Butyl 4-pyrrolo[2,3-b]pyridin-1-ylpiperidin-1-carboxylate tert-Butyl 4-pyrrolo[2,3-b]pyridin-1-ylpiperidin-1-carboxylate 1093759-55-7 C17H23N3O2
4-Bromo-1H-indole-7-carboxylic acid 4-Bromo-1H-indole-7-carboxylic acid 1211594-25-0 C9H6BrNO2
3-(1(3H)-Isobenzofuranone, 3-(1-Butyl-2-Methyl-1H-Indol-3-YL)-6-(DiMethylaMino)-3-[4-(DiMethylaMino) Phenyl] 3-(1(3H)-Isobenzofuranone, 3-(1-Butyl-2-Methyl-1H-Indol-3-YL)-6-(DiMethylaMino)-3-[4-(DiMethylaMino) Phenyl] 92453-31-1 C31H35N3O2
MHI-148 MHI-148 172971-76-5 C42H52BrClN2O4
6-(Trifluoromethyl)indoline 6-(Trifluoromethyl)indoline 181513-29-1 C9H8F3N
4-bromo-1-methylindoline-2,3-dione 4-bromo-1-methylindoline-2,3-dione 884855-67-8 C9H6BrNO2
1-Amino-2-methylindoline hydrochloride 1-Amino-2-methylindoline hydrochloride 102789-79-7 C9H13ClN2
5-Fluoro-2-methylindole 5-Fluoro-2-methylindole 399-72-4 C9H8FN
3-Bromo-7-azaindole 3-Bromo-7-azaindole 74420-15-8 C7H5BrN2
3-[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethyl]-6-fluoro-1H-indole-4-carboxylic acid methyl ester 3-[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethyl]-6-fluoro-1H-indole-4-carboxylic acid methyl ester 1408282-25-6 C20H15FN2O4
3,3-dimethyl-2-oxoindolin-6-carboxylic acid 3,3-dimethyl-2-oxoindolin-6-carboxylic acid 127267-57-6 C11H11NO3
1H-Indol-4-ol, 2,6-dimethyl- 1H-Indol-4-ol, 2,6-dimethyl- 65752-14-9 C10H11NO
5-phenyl-5,8-dihydroindolo[2,3-c]carbazole 5-phenyl-5,8-dihydroindolo[2,3-c]carbazole 1637752-63-6 C24H16N2
Indobufen Impurity 3 Indobufen Impurity 3 1379292-20-2 C10H11NO3
5-Trifluoromethyl-2-oxindole 5-Trifluoromethyl-2-oxindole 71293-62-4 C9H6F3NO
10H-BENZOFURO[3,2-B]INDOLE 10H-BENZOFURO[3,2-B]INDOLE 248-66-8 C14H9NO
6-Bromoindole-2-carboxylic acid 6-Bromoindole-2-carboxylic acid 16732-65-3 C9H6BrNO2
1-ACETYL-5-AMINO-2,3-DIHYDRO-(1H)-INDOLE 1-ACETYL-5-AMINO-2,3-DIHYDRO-(1H)-INDOLE 4993-96-8 C10H12N2O
N,N-DIPROPYLTRYPTAMINE N,N-DIPROPYLTRYPTAMINE 61-52-9 C16H24N2
ISOINDOLIN-1-ONE ISOINDOLIN-1-ONE 480-91-1 C8H7NO
Methyl oxindole-5-carboxylate Methyl oxindole-5-carboxylate 199328-10-4 C10H9NO3
(1Z,3Z)-1,3-Bis[[(4S)-4,5-dihydro-4-isopropyl-2-oxazolyl]methylene]-2,3-dihydro-1H-isoindole (1Z,3Z)-1,3-Bis[[(4S)-4,5-dihydro-4-isopropyl-2-oxazolyl]methylene]-2,3-dihydro-1H-isoindole 1361563-40-7 C22H27N3O2
2-PHENYLINDOLIZINE 2-PHENYLINDOLIZINE 25379-20-8 C14H11N
4,7-difluoro-1H-indole-2-carboxylic acid 4,7-difluoro-1H-indole-2-carboxylic acid 247564-67-6 C9H5F2NO2
1-(Hydroxymethyl)indoline-2,3-dione 1-(Hydroxymethyl)indoline-2,3-dione 50899-59-7 C9H7NO3
3-ethyl-2-methyl-4,5,6,7-tetrahydroindol-4-one 3-ethyl-2-methyl-4,5,6,7-tetrahydroindol-4-one 6116-76-3 C11H15NO
INDOLE-3-CARBOXALDEHYDE INDOLE-3-CARBOXALDEHYDE 4877-89-8 C20H17N5O10
Indobufen Impurity 41 Indobufen Impurity 41 1823992-40-0 C10H12N2
5,7-DIBROMO INDOLE 5,7-DIBROMO INDOLE 36132-08-8 C8H5Br2N
1H-Indole-4-carboxamide, N-(1H-indazol-3-ylmethyl)- 1H-Indole-4-carboxamide, N-(1H-indazol-3-ylmethyl)- 1359309-11-7 C17H14N4O
1H-Isoindol-1-one, 2,3-dihydro-4-hydroxy- (9CI) 1H-Isoindol-1-one, 2,3-dihydro-4-hydroxy- (9CI) 366453-21-6 C8H7NO2
6-(5-methyl-1,3-dioxoisoindolin-2-yl)hexanoic acid 6-(5-methyl-1,3-dioxoisoindolin-2-yl)hexanoic acid 303773-52-6 C15H17NO4
6-(4,7-dimethyl-1,3-dioxoisoindolin-2-yl)hexanoic acid 6-(4,7-dimethyl-1,3-dioxoisoindolin-2-yl)hexanoic acid 1970476-82-4 C16H19NO4
6-Chloro-7-fluoro-2-methyl-1H-indole 6-Chloro-7-fluoro-2-methyl-1H-indole 1334247-06-1 C9H7ClFN
5,6-Dichloro-1-methylisoindoline 5,6-Dichloro-1-methylisoindoline 2688735-27-3 C9H9Cl2N
Benzofuran-5-ylmethanesulfonyl chloride Benzofuran-5-ylmethanesulfonyl chloride 869885-60-9 C8H5ClO3S
5-Chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole 5-Chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole
3-Bromo-1H-isoindoline 3-Bromo-1H-isoindoline 127168-81-4 C8H8BrN
5,6-dihydroxy-1H-indole-2-carboxylic acid 5,6-dihydroxy-1H-indole-2-carboxylic acid 4790-08-3 C9H7NO4
1H-Indole-3-propanoicacid,-alpha--hydroxy-,(-alpha-S)-(9CI) 1H-Indole-3-propanoicacid,-alpha--hydroxy-,(-alpha-S)-(9CI) 7417-65-4 C11H11NO3
1H-Indol-6-amine,2-methyl-(9CI) 1H-Indol-6-amine,2-methyl-(9CI) 102308-53-2 C9H10N2
1H-Indole-6-aceticacid(9CI) 1H-Indole-6-aceticacid(9CI) 39689-58-2 C10H9NO2
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