一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Heterocyclic Compounds

Heterocyclic compounds are a class of compounds that consist of carbon atoms and non-carbon atoms altogether forming a cyclic skeletal structure. These non-carbon atoms are collectively referred to as a heteroatom. The common heteroatoms include nitrogen, oxygen, and sulfur. Lactones, lactams, cyclic ethers that we’ve already learned are heterocyclic compounds. With similar properties of congeneric open-chain compounds, they will be discussed in corresponding chapters. This chapter will mainly discuss heterocyclic compounds with relatively stable ring system and with a certain degree of aromaticity, also known as aromatic heterocyclic compound.

There are many kinds and a large number of heterocyclic compounds widely distributed in nature. Many natural heterocyclic compounds in animals and plants play an important physiological role in the body. For example, heterocyclic structure exists in chlorophyll in plants, hemoglobin in animal blood, alkaloids and glycosides as the active ingredient in herbs, some antibiotics and vitamins, certain composition of amino acids in protein and bases in nucleotide. About half of the existing medicines have heterocyclic structures. Thus, heterocyclic compounds play an important role in organic compounds especially in organic medicines.

The most common and also the most important heterocyclic compounds are that with five-membered or six-membered heterocyclic ring and their fused heterocyclic compounds. Therefore, according to the size of the ring, heterocyclic compounds can be divided into five-membered compounds and six-membered heterocyclic compounds. E.g., furan, thiophene, pyrrole, imidazole, triazole and their fused heterocyclic compounds, indole, benzimidazole and diphenylene-oxide are all five-membered heterocyclic compounds, while pyridine, pyrimidine and their fused heterocyclic compounds, quinoline and quinazoline are all six-membered heterocyclic compounds.

According to the number of hetero atoms, five-membered compounds and six-membered heterocyclic compounds can be divided into one-hetero-atom-containing heterocyclic compounds and two-hetero-atom-containing and several-hetero-atom-containing heterocyclic compounds. E.g., furan, thiophene, pyridine, indole, quinoline, dibenzofuran, etc. are one-hetero-atom-containing heterocyclic compounds; imidazole, pyrimidine, benzimidazole, quinazoline, etc. are two-hetero-atom-containing heterocyclic compounds; purine, comprising more than two hetero atoms, is a several-hetero-atom-containing heterocyclic compound. According to the form of the ring in the molecule, heterocyclic compounds can be divided into single-heterocyclic compounds and fused heterocyclic compounds. E.g., furan, pyridine, pyrimidine, imidazole, etc. are single-heterocyclic compounds and indole, quinoline, dibenzofuran, purines, etc. are fused heterocyclic compounds.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
3-(4-bromophenyl)-N-phenylcarbazole 3-(4-bromophenyl)-N-phenylcarbazole 1028647-93-9 C24H16BrN
3-BROMO-1H-PYRAZOLE 3-BROMO-1H-PYRAZOLE 14521-80-3 C3H3BrN2
1-Amino-2-methylpropan-2-ol 1-Amino-2-methylpropan-2-ol 2854-16-2 C4H11NO
5-bromo-1H-indazole 5-bromo-1H-indazole 53857-57-1 C7H5BrN2
3-Bromo-9H-carbazole 3-Bromo-9H-carbazole 1592-95-6 C12H8BrN
3,3-DIFLUOROPYRROLIDINE HYDROCHLORIDE 3,3-DIFLUOROPYRROLIDINE HYDROCHLORIDE 163457-23-6 C4H7F2N.ClH
6-Bromo-3-nitro-4-quinolinol 6-Bromo-3-nitro-4-quinolinol 853908-50-6 C9H5BrN2O3
(3aR,4S,7R,7aS)  4,7-Methano-1H-isoindole-1,3(2H)-dione (3aR,4S,7R,7aS) 4,7-Methano-1H-isoindole-1,3(2H)-dione 14805-29-9 C9H11NO2
7-Azaindole 7-Azaindole 271-63-6 C7H6N2
6-Bromoindazole 6-Bromoindazole 79762-54-2 C7H5BrN2
9-Phenyl-9H-carbazol-3-ylboronic acid 9-Phenyl-9H-carbazol-3-ylboronic acid 854952-58-2 C18H14BNO2
(S)-3-Hydroxypyrrolidine hydrochloride (S)-3-Hydroxypyrrolidine hydrochloride 122536-94-1 C4H10ClNO
THIAZOLIDINE THIAZOLIDINE 504-78-9 C3H7NS
Oxetan-3-ol Oxetan-3-ol 7748-36-9 C3H6O2
4-Chloro-7-azaindole 4-Chloro-7-azaindole 55052-28-3 C7H5ClN2
Cyanuric fluoride Cyanuric fluoride 675-14-9 C3F3N3
3,3'-Dibromo-2,2'-bithiophene 3,3'-Dibromo-2,2'-bithiophene 51751-44-1 C8H4Br2S2
Ethyl 3-amino-4-pyrazolecarboxylate Ethyl 3-amino-4-pyrazolecarboxylate 6994-25-8 C6H9N3O2
4,4'-Bipyridine 4,4'-Bipyridine 553-26-4 C10H8N2
Isoquinoline Isoquinoline 119-65-3 C9H7N
Coumarin Coumarin 91-64-5 C9H6O2
2-Piperidone 2-Piperidone 675-20-7 C5H9NO
Fluorene Fluorene 86-73-7 C13H10
Pyrrole Pyrrole 109-97-7 C4H5N
5-Bromoindole 5-Bromoindole 10075-50-0 C8H6BrN
Carbazole Carbazole 86-74-8 C12H9N
Thiophene Thiophene 110-02-1 C4H4S
1-Boc-pyrrolidine-3-carboxylic acid 1-Boc-pyrrolidine-3-carboxylic acid 59378-75-5 C10H17NO4
TEMPO TEMPO 2564-83-2 C9H18NO*
Melamine Melamine 108-78-1 C3H6N6
4,7-Dichloroquinoline 4,7-Dichloroquinoline 86-98-6 C9H5Cl2N
5-Azaindole 5-Azaindole 271-34-1 C7H6N2
2,6-Lutidine 2,6-Lutidine 108-48-5 C7H9N
2,4,6-Collidine 2,4,6-Collidine 108-75-8 C8H11N
Thiazole Thiazole 288-47-1 C3H3NS
2-Aminopyridine 2-Aminopyridine 504-29-0 C5H6N2
2-Acetyl-6-methoxynaphthalene 2-Acetyl-6-methoxynaphthalene 3900-45-6 C13H12O2
Indole Indole 120-72-9 C8H7N
(R)-(-)-3-Hydroxytetrahydrofuran (R)-(-)-3-Hydroxytetrahydrofuran 86087-24-3 C4H8O2
1-Boc-3-piperidone 1-Boc-3-piperidone 98977-36-7 C10H17NO3
Furfural Furfural 98-01-1 C5H4O2
Morpholine Morpholine 110-91-8 C4H9NO
3-Quinuclidinol 3-Quinuclidinol 1619-34-7 C7H13NO
2,4-DIHYDROXY-6-NITROQUINAZOLINE 2,4-DIHYDROXY-6-NITROQUINAZOLINE 32618-85-2 C8H5N3O4
3-Piperidinone 3-Piperidinone 50717-82-3 C5H9NO
(S)-1-N-Boc-2-methylpiperazine (S)-1-N-Boc-2-methylpiperazine 169447-70-5 C10H20N2O2
3,5-DIMETHYL-1-PHENYLPYRAZOLE 3,5-DIMETHYL-1-PHENYLPYRAZOLE 1131-16-4 C11H12N2
1-[[2,4,6-Tris(isopropyl)phenyl]sulphonyl]-1H-1,2,4-triazole 1-[[2,4,6-Tris(isopropyl)phenyl]sulphonyl]-1H-1,2,4-triazole 54230-60-3 C17H25N3O2S
4-ACETYL-5-METHYL-1-PHENYLPYRAZOLE 4-ACETYL-5-METHYL-1-PHENYLPYRAZOLE 6123-63-3 C12H12N2O
(3R)-(+)-1-BENZYL-3-(TERT-BUTOXYCARBONYLAMINO)PYRROLIDINE (3R)-(+)-1-BENZYL-3-(TERT-BUTOXYCARBONYLAMINO)PYRROLIDINE 131878-23-4 C16H24N2O2
(R)-3-AMINOMETHYL-1-CBZ-PYRROLIDINE (R)-3-AMINOMETHYL-1-CBZ-PYRROLIDINE 1217749-69-3 C13H18N2O2
5-(3-BROMO-PHENYL)-1H-PYRAZOLE 5-(3-BROMO-PHENYL)-1H-PYRAZOLE 149739-65-1 C9H7BrN2
Cyanuric chloride Cyanuric chloride 108-77-0 C3Cl3N3
Furan Furan 110-00-9 C4H4O
5-AMINO-1-PHENYLPYRAZOLE-4-CARBONITRILE 5-AMINO-1-PHENYLPYRAZOLE-4-CARBONITRILE 5334-43-0 C10H8N4
2-(4-BROMO-1H-IMIDAZOL-2-YL)-PYRIDINE 2-(4-BROMO-1H-IMIDAZOL-2-YL)-PYRIDINE 71048-48-1 C8H6BrN3
[2,2'-Bipyridin]-5-ol, 6'-bromo- [2,2'-Bipyridin]-5-ol, 6'-bromo- 1185307-68-9 C10H7BrN2O
3-(4-Bromo-3-methyl-2-oxo-2,3-dihydro-1h-benzo[d]imidazol-1-yl)piperidine-2,6-dione 3-(4-Bromo-3-methyl-2-oxo-2,3-dihydro-1h-benzo[d]imidazol-1-yl)piperidine-2,6-dione 2304754-51-4 C13H12BrN3O3
2,2'-(cyclopropane-1,1-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) 2,2'-(cyclopropane-1,1-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) 2222867-16-3 C15H28B2O4
1-(oxan-4-yl)-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1-(oxan-4-yl)-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 2223054-66-6 C14H23BN2O3
2,2'-Bioxazole, 4,4',5,5'-tetrahydro-4,4'-bis[(1S)-1-methylpropyl]-, (4S,4'S)- 2,2'-Bioxazole, 4,4',5,5'-tetrahydro-4,4'-bis[(1S)-1-methylpropyl]-, (4S,4'S)- 133463-89-5 C14H24N2O2
4(1H)-Pyrimidinone, 2,5,6-trichloro- 4(1H)-Pyrimidinone, 2,5,6-trichloro- 24688-43-5 C4HCl3N2O
1,4-bis(1-(4-methyl)imidazolyl)benzene 1,4-bis(1-(4-methyl)imidazolyl)benzene 1627843-75-7 C14H14N4
4-(1H-IMIDAZOL-2-YL)-PYRIDINE 4-(1H-IMIDAZOL-2-YL)-PYRIDINE 21202-42-6 C8H7N3
Pyridine, 2-chloro-4-fluoro-6-methoxy- Pyridine, 2-chloro-4-fluoro-6-methoxy- 1227502-57-9 C6H5ClFNO
1H-1,2,3-Triazole, 5-(3-methoxyphenyl)- 1H-1,2,3-Triazole, 5-(3-methoxyphenyl)- 1017579-86-0 C9H9N3O
Thiazole, 4-bromo-5-ethyl- Thiazole, 4-bromo-5-ethyl- 1264033-99-9 C5H6BrNS
Boronic acid, B-[4-(2-pyrimidinyl)phenyl]- Boronic acid, B-[4-(2-pyrimidinyl)phenyl]- 1615248-01-5 C10H9BN2O2
Boronic acid, B-[4-(4-pyrimidinyl)phenyl]- Boronic acid, B-[4-(4-pyrimidinyl)phenyl]- 1907696-52-9 C10H9BN2O2
4-Pyrimidinamine, 5-bromo-2-(1-methylethyl)- 4-Pyrimidinamine, 5-bromo-2-(1-methylethyl)- 1381942-46-6 C7H10BrN3
5-AMINO-3-METHYL-PYRIDIN-2-OL 5-AMINO-3-METHYL-PYRIDIN-2-OL 20252-07-7 C6H8N2O
2H-Tetrazole, 5-bromo-2-(1-methylethyl)- 2H-Tetrazole, 5-bromo-2-(1-methylethyl)- 1783421-43-1 C4H7BrN4
7-BROMO-4-CHLOROQUINAZOLINE 7-BROMO-4-CHLOROQUINAZOLINE 573675-55-5 C8H4BrClN2
7-Bromoquinazoline 7-Bromoquinazoline 89892-22-8 C8H5BrN2
Acridine Acridine 260-94-6 C13H9N
2-Octylbenzimidazole 2-Octylbenzimidazole 13060-24-7 C15H22N2
Morpholine, 4-(4-bromo-3-methoxyphenyl)- Morpholine, 4-(4-bromo-3-methoxyphenyl)- 221360-89-0 C11H14BrNO2
Pyridine, 2-bromo-5-(1H-imidazol-2-yl)- Pyridine, 2-bromo-5-(1H-imidazol-2-yl)- 1211583-15-1 C8H6BrN3
1,3,2-Dioxaborolane, 2-(3-bromo-2-furanyl)-4,4,5,5-tetramethyl- 1,3,2-Dioxaborolane, 2-(3-bromo-2-furanyl)-4,4,5,5-tetramethyl- 1802557-95-4 C10H14BBrO3
2-Thiazolamine, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-2-thiazolyl- 2-Thiazolamine, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-2-thiazolyl- 1402174-68-8 C12H16BN3O2S2
ARV110 ARV110 2222112-77-6 C41H43ClFN9O6
Fasoracetam Fasoracetam 110958-19-5 C10H16N2O2
(S)-2-(4-Fluorophenyl)pyrrolidine (S)-2-(4-Fluorophenyl)pyrrolidine 298690-90-1 C10H12FN
Pyridine, 3-(2-methoxyethoxy)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- Pyridine, 3-(2-methoxyethoxy)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 1628707-47-0 C14H22BNO4
6-phenyluracil 6-phenyluracil 13345-09-0 C10H8N2O2
1-(3-Chlorophenyl)imidazolidin-2-one 1-(3-Chlorophenyl)imidazolidin-2-one 14088-98-3 C9H9ClN2O
N-[2-(4-Oxo-4H-3,1-benzoxazin-2-yl)phenyl]-2-naphthalenesulfonamide N-[2-(4-Oxo-4H-3,1-benzoxazin-2-yl)phenyl]-2-naphthalenesulfonamide 10128-55-9 C24H16N2O4S
1H-Pyrazole, 3,4-dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 1H-Pyrazole, 3,4-dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 2368225-26-5 C11H19BN2O2
2-(3-pentenyl)pyridine 2-(3-pentenyl)pyridine 2057-43-4 C10H13N
(S)-2-Tert-butoxycarbonylamino-3-quinolin-6-yl-propionic acid (S)-2-Tert-butoxycarbonylamino-3-quinolin-6-yl-propionic acid 162677-20-5 C17H20N2O4
1-ethyl-4-(2-morpholinoethyl)-3,3-diphenylpyrrolidin-2-one monohydrochloride 1-ethyl-4-(2-morpholinoethyl)-3,3-diphenylpyrrolidin-2-one monohydrochloride 113-07-5 C24H31ClN2O2
5-BROMO-2-ISOPROPYLOXAZOLE 5-BROMO-2-ISOPROPYLOXAZOLE 1391739-84-6 C6H8BrNO
6-Bromo-2-(5''-cyano-2''-pyridyl)pyrazine 6-Bromo-2-(5''-cyano-2''-pyridyl)pyrazine 1185318-78-8 C10H5BrN4
1H-Pyrrolizine-7a(5H)-methanol, 2,6-difluorotetrahydro- 1H-Pyrrolizine-7a(5H)-methanol, 2,6-difluorotetrahydro- 2621938-62-1 C8H13F2NO
(S)-2-methyl-6-(pyrrolidin-2-yl)pyridine (S)-2-methyl-6-(pyrrolidin-2-yl)pyridine 1213442-21-7 C10H14N2
Hexamethylol melamine Hexamethylol melamine 531-18-0 C9H18N6O6
2-Pyridinamine, 4-(1,1-dimethylethyl)-6-methyl- 2-Pyridinamine, 4-(1,1-dimethylethyl)-6-methyl- 908271-20-5 C10H16N2
3,4,5-Trimethyl-1H-pyrazole 3,4,5-Trimethyl-1H-pyrazole 5519-42-6 C6H10N2
N-METHYLFULLEROPYRROLIDINE N-METHYLFULLEROPYRROLIDINE 151872-44-5 C63H7N
(2S,5S)-5-Benzyl-3-methyl-2-(5-methyl-2-furyl)-4-imidazolidinone, 95% (2S,5S)-5-Benzyl-3-methyl-2-(5-methyl-2-furyl)-4-imidazolidinone, 95% 415678-40-9 C16H18N2O2
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
奇台县| 石嘴山市| 仪征市| 三亚市| 新郑市| 介休市| 密云县| 湘阴县| 镇远县| 太仆寺旗| 崇信县| 大渡口区| 建瓯市| 澄江县| 靖宇县| 湖北省| 曲松县| 科技| 博客| 大兴区| 漳平市| 海门市| 延寿县| 拜泉县| 沈阳市| 德令哈市| 二连浩特市| 伊吾县| 华阴市| 大关县| 永胜县| 象州县| 常德市| 海阳市| 昌乐县| 承德市| 华池县| 含山县| 泰顺县| 蒙自县| 钟祥市|