天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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
6,7-Dimethoxy-3,4-dihydroisoquinoline 6,7-Dimethoxy-3,4-dihydroisoquinoline 3382-18-1 C11H13NO2
6-BROMO-3H-IMIDAZO[4,5-B]PYRIDINE 6-BROMO-3H-IMIDAZO[4,5-B]PYRIDINE 28279-49-4 C6H4BrN3
5,6-Dimethoxy-2-(pyridine-4-yl)methylene-indan-1-one 5,6-Dimethoxy-2-(pyridine-4-yl)methylene-indan-1-one 4803-74-1 C17H15NO3
2-(3-Bromopropoxy)tetrahydro-2H-pyran 2-(3-Bromopropoxy)tetrahydro-2H-pyran 33821-94-2 C8H15BrO2
5-BROMO-2-CHLOROPYRIDIN-3-YLBORONIC ACID 5-BROMO-2-CHLOROPYRIDIN-3-YLBORONIC ACID 1072944-19-4 C5H4BBrClNO2
4-PHENYLPYRIDINE-2-CARBOXYLIC ACID 4-PHENYLPYRIDINE-2-CARBOXYLIC ACID 52565-56-7 C12H9NO2
4-BROMODIBENZOTHIOPHENE 4-BROMODIBENZOTHIOPHENE 97511-05-2 C12H7BrS
3-PYRIMIDIN-5-YLBENZALDEHYDE 3-PYRIMIDIN-5-YLBENZALDEHYDE 640769-70-6 C11H8N2O
2-Cyano-3-chloro-5-(trifluoromethyl)-pyridine 2-Cyano-3-chloro-5-(trifluoromethyl)-pyridine 80194-70-3 C7H2ClF3N2
2-(ETHYLMETHYLAMINO)PYRIDINE 2-(ETHYLMETHYLAMINO)PYRIDINE 77200-12-5 C8H12N2
2,4-DIBROMO-5-NITROPYRIDINE 2,4-DIBROMO-5-NITROPYRIDINE 4487-57-4 C5H2Br2N2O2
2-Chloro-4-methylpyridine-3-carbonitrile 2-Chloro-4-methylpyridine-3-carbonitrile 65169-38-2 C7H5ClN2
3-isoquinolinecarboxaldehyde 3-isoquinolinecarboxaldehyde 5470-80-4 C10H7NO
Methyl 6-amino-3-bromopicolinate Methyl 6-amino-3-bromopicolinate 178876-83-0 C7H7BrN2O2
3,5-DIAMINOPYRIDINE 3,5-DIAMINOPYRIDINE 4318-78-9 C5H7N3
6-Isoquinolinecarbonitrile(9CI) 6-Isoquinolinecarbonitrile(9CI) 106778-42-1 C10H6N2
2(1H)-Pyridinone,3-chloro-4-hydroxy-(9CI) 2(1H)-Pyridinone,3-chloro-4-hydroxy-(9CI) 103792-81-0 C5H4ClNO2
2-AMINO-4-PHENYL-THIOPHENE-3-CARBOXYLIC ACID ETHYL ESTER 2-AMINO-4-PHENYL-THIOPHENE-3-CARBOXYLIC ACID ETHYL ESTER 4815-36-5 C13H13NO2S
Phenylisoquinoline Phenylisoquinoline 3297-72-1 C15H11N
2-AMINO-4-METHYL-5-PYRIDINECARBOXYLIC ACID 2-AMINO-4-METHYL-5-PYRIDINECARBOXYLIC ACID 179555-11-4 C7H8N2O2
1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one 1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one 5661-01-8 C7H8N2O
5-BROMO-4-PYRIMIDINECARBOXYLIC ACID 5-BROMO-4-PYRIMIDINECARBOXYLIC ACID 64224-60-8 C5H3BrN2O2
4-CHLORO-6-ETHYL-2-PYRIMIDINAMINE 4-CHLORO-6-ETHYL-2-PYRIMIDINAMINE 5734-67-8 C6H8ClN3
1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid 1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid 3719-45-7 C7H7NO3
2,5,6-Trifluoronicotinic aicid nitrile 2,5,6-Trifluoronicotinic aicid nitrile 870065-73-9 C6HF3N2
3-PYRIDINAMINE, 6-(1-METHYLETHYL)- 3-PYRIDINAMINE, 6-(1-METHYLETHYL)- 405103-02-8 C8H12N2
2-CHLORO-6-METHYLPYRIDINE-4-CARBOXALDEHYDE 2-CHLORO-6-METHYLPYRIDINE-4-CARBOXALDEHYDE 479613-16-6 C7H6ClNO
2-CHLORO-5-FLUORO-PYRIDINE-3-CARBALDEHYDE 2-CHLORO-5-FLUORO-PYRIDINE-3-CARBALDEHYDE 851484-95-2 C6H3ClFNO
4-CHLORO-3-IODO-PYRIDIN-2-YLAMINE 4-CHLORO-3-IODO-PYRIDIN-2-YLAMINE 417721-69-8 C5H4ClIN2
7-CHLORO-5-METHYLPYRAZOLO[1,5-A]PYRIMIDINE 7-CHLORO-5-METHYLPYRAZOLO[1,5-A]PYRIMIDINE 16082-27-2 C7H6ClN3
4-Pyridinemethanamine,2-amino-(9CI) 4-Pyridinemethanamine,2-amino-(9CI) 199296-51-0 C6H9N3
1-methyl-1,2,3,4-tetrahydroisoquinoline 1-methyl-1,2,3,4-tetrahydroisoquinoline 4965-09-7 C10H13N
2-PHENYLSULFONYLPRIDINE 2-PHENYLSULFONYLPRIDINE 24244-60-8 C11H9NO2S
2-Amino-5-bromo-4-chloro-3-nitropyridine 2-Amino-5-bromo-4-chloro-3-nitropyridine 942947-95-7 C5H3BrClN3O2
4-CHLORO-1H-PYRAZOLO[3,4-D]PYRIMIDIN-6-AMINE 4-CHLORO-1H-PYRAZOLO[3,4-D]PYRIMIDIN-6-AMINE 100644-65-3 C5H4ClN5
3-BUTYLPYRIDINE 3-BUTYLPYRIDINE 539-32-2 C9H13N
5-bromo-4-chlorothieno[2,3-d]pyrimidine 5-bromo-4-chlorothieno[2,3-d]pyrimidine 814918-95-1 C6H2BrClN2S
CHIR-99021 CHIR-99021 252917-06-9 C22H18Cl2N8
1,3-DIMETHYL-5-NITROURACIL HYDRATE 1,3-DIMETHYL-5-NITROURACIL HYDRATE 41613-26-7 C6H7N3O4
8-BROMO-2-METHYL-QUINOLINE 8-BROMO-2-METHYL-QUINOLINE 61047-43-6 C10H8BrN
3,5-DIMETHYLPYRIDINE-4-CARBOXALDEHYDE 3,5-DIMETHYLPYRIDINE-4-CARBOXALDEHYDE 201286-64-8 C8H9NO
3-METHYL-5-NITROPYRIDINE 3-METHYL-5-NITROPYRIDINE 6960-20-9 C6H6N2O2
2-ACETAMIDO-6-METHYLPYRIDINE 2-ACETAMIDO-6-METHYLPYRIDINE 5327-33-3 C8H10N2O
4-(2-AMINOETHYL)TETRAHYDROPYRAN 4-(2-AMINOETHYL)TETRAHYDROPYRAN 65412-03-5 C7H15NO
2,6-Dimethylpiperazine 2,6-Dimethylpiperazine 108-49-6 C6H14N2
5,7-Dimethyl-8-hydroxyquinoline 5,7-Dimethyl-8-hydroxyquinoline 37873-29-3 C11H11NO
4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine 4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine 494767-29-2 C7H7ClN2
Ethyl 6-aminonicotinate Ethyl 6-aminonicotinate 39658-41-8 C8H10N2O2
3-PHENYLTHIOPHENE 3-PHENYLTHIOPHENE 2404-87-7 C10H8S
5,6-DIHYDRO-2H-PYRAN-2-ONE 5,6-DIHYDRO-2H-PYRAN-2-ONE 3393-45-1 C5H6O2
5-BROMO-2-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE 5-BROMO-2-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE 211122-40-6 C6H2BrClF3N
2,5-Dichloro-4-iodopyridine 2,5-Dichloro-4-iodopyridine 796851-03-1 C5H2Cl2IN
BENZONITRILE, 4-[(4,6-DICHLORO-2-PYRIMIDINYL)AMINO]- BENZONITRILE, 4-[(4,6-DICHLORO-2-PYRIMIDINYL)AMINO]- 329187-59-9 C11H6Cl2N4
4-METHYL-PYRIDINE-2-CARBOXYLIC ACID 4-METHYL-PYRIDINE-2-CARBOXYLIC ACID 4021-08-3 C7H7NO2
4-CHLORO-5-PHENYLTHIENO[2,3-D]PYRIMIDINE 4-CHLORO-5-PHENYLTHIENO[2,3-D]PYRIMIDINE 182198-35-2 C12H7ClN2S
3-Chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid 3-Chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid 80194-18-9 C46H44Cl3N7O9S2
5,6,7,8-TETRAHYDROQUINOLIN-8-AMINE 5,6,7,8-TETRAHYDROQUINOLIN-8-AMINE 298181-83-6 C9H12N2
ETHYL 2-AMINO-4-METHYLTHIOPHENE-3-CARBOXYLATE ETHYL 2-AMINO-4-METHYLTHIOPHENE-3-CARBOXYLATE 43088-42-2 C8H11NO2S
2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride 2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride 6000-50-6 C7H9ClN2
GDC-0879 GDC-0879 905281-76-7 C19H18N4O2
TPEN TPEN 16858-02-9 C26H28N6
5-Bromo-2-hydroxy-3-(trifluoromethyl)pyridine 5-Bromo-2-hydroxy-3-(trifluoromethyl)pyridine 76041-79-7 C6H3BrF3NO
2-VINYLPYRAZINE 2-VINYLPYRAZINE 4177-16-6 C6H6N2
2-CHLORO-5-FLUORO-4-FORMYLPYRIDINE 2-CHLORO-5-FLUORO-4-FORMYLPYRIDINE 884494-54-6 C6H3ClFNO
2-CHLORO-5-FLUORO-3-IODOPYRIDINE 2-CHLORO-5-FLUORO-3-IODOPYRIDINE 884494-33-1 C5H2ClFIN
2,5-DIPHENYLTHIOPHENE 2,5-DIPHENYLTHIOPHENE 1445-78-9 C16H12S
2,3,5-Trichloropyridine-4-carboxaldehyde 2,3,5-Trichloropyridine-4-carboxaldehyde 251997-31-6 C6H2Cl3NO
ISOPROPALIN ISOPROPALIN 33820-53-0 C15H23N3O4
1-Cyclohexylpiperazine 1-Cyclohexylpiperazine 17766-28-8 C10H20N2
1-PYRIDIN-4-YL-ETHANOL 1-PYRIDIN-4-YL-ETHANOL 42732-22-9 C7H9NO
C-(6-BROMO-PYRIDIN-3-YL)-METHYLAMINE C-(6-BROMO-PYRIDIN-3-YL)-METHYLAMINE 120740-10-5 C6H7BrN2
3-AMINO-2-CHLORO-6-(TRIFLUOROMETHYL)PYRIDINE 3-AMINO-2-CHLORO-6-(TRIFLUOROMETHYL)PYRIDINE 65182-56-1 C14H10N2O
5,7-DICHLORO-IMIDAZO[1,2-A]PYRIMIDINE 5,7-DICHLORO-IMIDAZO[1,2-A]PYRIMIDINE 57473-32-2 C6H3Cl2N3
6-Methyl-3-oxo-2,3-dihydropyridazine-4-carboxylic acid 6-Methyl-3-oxo-2,3-dihydropyridazine-4-carboxylic acid 74557-73-6 C6H6N2O3
2-AMINOMETHYL-3-METHYLPYRIDINE 2-AMINOMETHYL-3-METHYLPYRIDINE 153936-26-6 C7H10N2
Tetrahydropyranyl-4-acetic acid Tetrahydropyranyl-4-acetic acid 85064-61-5 C7H12O3
3-AMINO-4-METHOXYPYRIDINE 3-AMINO-4-METHOXYPYRIDINE 33631-09-3 C6H8N2O
2-Ethylpiperazine 2-Ethylpiperazine 13961-37-0 C6H14N2
3-[(4,6-DIMETHOXYPYRIMIDIN-2-YL)OXY]BENZOIC ACID 3-[(4,6-DIMETHOXYPYRIMIDIN-2-YL)OXY]BENZOIC ACID C13H12N2O5
2,6-DIMETHOXY-3-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 2,6-DIMETHOXY-3-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 214360-59-5 C13H20BNO4
(R)-(+)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE (R)-(+)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE 64138-65-4 C13H13N3O2
5-Methylthianaphthene 5-Methylthianaphthene 14315-14-1 C9H8S
3-HYDROXY-5-NITROPYRIDINE 3-HYDROXY-5-NITROPYRIDINE 186593-26-0 C5H4N2O3
5-CHLORO-3-HYDROXYMETHYL-6-METHOXYPYRIDINE 5-CHLORO-3-HYDROXYMETHYL-6-METHOXYPYRIDINE 132865-53-3 C7H8ClNO2
3-BROMO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 3-BROMO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 1031929-01-7 C6H2BrF4N
ETHYL 6-OXO-2-PHENYL-1,6-DIHYDRO-5-PYRIMIDINECARBOXYLATE ETHYL 6-OXO-2-PHENYL-1,6-DIHYDRO-5-PYRIMIDINECARBOXYLATE 55613-22-4 C13H12N2O3
(4-FLUORO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE (4-FLUORO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE 113248-64-9 C13H13FN2
2,5-DIMETHYL-1-(2-THIENYLMETHYL)-1H-PYRROLE-3-CARBOXYLIC ACID 2,5-DIMETHYL-1-(2-THIENYLMETHYL)-1H-PYRROLE-3-CARBOXYLIC ACID 306936-14-1 C12H13NO2S
(5-TRIFLUOROMETHYL-PYRIDIN-2-YL) METHANOL (5-TRIFLUOROMETHYL-PYRIDIN-2-YL) METHANOL 31181-84-7 C7H6F3NO
4-(3-Methoxypropoxy)-2,3-dimethylpyridine-N-oxide 4-(3-Methoxypropoxy)-2,3-dimethylpyridine-N-oxide 117977-18-1 C11H17NO3
2-FLUORO-6-PICOLINE-5-BORONIC ACID 2-FLUORO-6-PICOLINE-5-BORONIC ACID 904326-91-6 C6H7BFNO2
2-(BENZYLTHIO)-3-NITROPYRIDINE 2-(BENZYLTHIO)-3-NITROPYRIDINE 69212-31-3 C12H10N2O2S
6-METHYL-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE 6-METHYL-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE 16075-68-6 C9H8N2O
5-Methylpyridine-3-carboxaldehyde 5-Methylpyridine-3-carboxaldehyde 100910-66-5 C7H7NO
NAPHTHALEN-1-YLMETHYL-PYRIDIN-4-YLMETHYL-AMINE NAPHTHALEN-1-YLMETHYL-PYRIDIN-4-YLMETHYL-AMINE 680185-80-2 C17H16N2
7-HYDROXY-4-(4-PYRIDYL)COUMARIN MONOHYDRATE 7-HYDROXY-4-(4-PYRIDYL)COUMARIN MONOHYDRATE 386704-08-1 C14H11NO4
5-CHLOROISOQUINOLINE 5-CHLOROISOQUINOLINE 5430-45-5 C9H6ClN
3,5-DICHLORO-2,6-DIFLUOROPYRIDINE-4-CARBOXALDEHYDE 3,5-DICHLORO-2,6-DIFLUOROPYRIDINE-4-CARBOXALDEHYDE 17723-32-9 C6HCl2F2NO
2,5-DIBROMO-3-AMINOPYRIDINE 2,5-DIBROMO-3-AMINOPYRIDINE 90902-84-4 C5H4Br2N2
2-Pyridyl tribromomethyl sulfone 2-Pyridyl tribromomethyl sulfone 59626-33-4 C6H4Br3NO2S
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.