午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

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
Pyridine,2,2'-(1,3-phenylene)bis- Pyridine,2,2'-(1,3-phenylene)bis- 136538-84-6 C16H12N2
1(tertbutoxycarbonyl)4,4difluoropyrrolidine3carboxylic acid 1(tertbutoxycarbonyl)4,4difluoropyrrolidine3carboxylic acid 1196145-11-5 C10H15F2NO4
2,6-Bis[(4R)-benzyl-2-oxazolin-2-yl]pyridine 2,6-Bis[(4R)-benzyl-2-oxazolin-2-yl]pyridine 365215-38-9 C25H23N3O2
5-BroMo-2-chloro-thiazolo[5,4-b]pyridine 5-BroMo-2-chloro-thiazolo[5,4-b]pyridine 1355241-50-7 C6H2BrClN2S
propan-2-one compound with imidazo[1,2-a]pyridine (1:1) propan-2-one compound with imidazo[1,2-a]pyridine (1:1) 116355-08-9 C10H10N2O
5-AMino-2-chloropyriMidine-4-carboxaMide 5-AMino-2-chloropyriMidine-4-carboxaMide 189747-29-3 C5H5ClN4O
5-METHYL-1,2,4-OXADIAZOL-3-AMINE 5-METHYL-1,2,4-OXADIAZOL-3-AMINE 40483-47-4 C3H5N3O
5-Bromo-1H-benzimidazole 5-Bromo-1H-benzimidazole 4887-88-1 C7H5BrN2
4-(CHLOROMETHYL)-1-TRITYL-1H-IMIDAZOLE 4-(CHLOROMETHYL)-1-TRITYL-1H-IMIDAZOLE 103057-10-9 C23H19ClN2
BTL benzotriazole BTL benzotriazole
Benzotriazole derivative Benzotriazole derivative
3-bromo-1-(oxan-2-yl)-1h-pyrazole 3-bromo-1-(oxan-2-yl)-1h-pyrazole 1044270-96-3 C8H11BrN2O
6-Bromo-8-methyl-imidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 6-Bromo-8-methyl-imidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 907945-82-8 C11H11BrN2O2
alpha-Glucosyl Hesperidin alpha-Glucosyl Hesperidin 161713-86-6 C34H44O20
3-[1-(4-Amino-butyl)-1H-[1,2,3]triazol-4-yl]-phenylamine 3-[1-(4-Amino-butyl)-1H-[1,2,3]triazol-4-yl]-phenylamine 1626413-52-2 C12H17N5
5-bromo-4-methylnicotinonitrile 5-bromo-4-methylnicotinonitrile 890092-52-1 C7H5BrN2
5-methyl-1H-4-carboxylic acid 5-methyl-1H-4-carboxylic acid 1457-59-6 C5H6N2O2
3-(1-pyrrolidinyl)propiophenone hydrochloride 3-(1-pyrrolidinyl)propiophenone hydrochloride 833-86-3 C13H17NO.ClH
1-bromo-3-(trifluoromethyl)-5H,6H,7H,8H-imidazo[1,5-a]pyrazine hydrochloride 1-bromo-3-(trifluoromethyl)-5H,6H,7H,8H-imidazo[1,5-a]pyrazine hydrochloride 2138351-97-8 C7H8BrClF3N3
4,5-dihydro-2-(2-methoxyphenyl)-1-[2-(2-methoxyphenyl)-4,5-diphenyl-2H-imidazol-2-yl]-1H-imidazole 4,5-dihydro-2-(2-methoxyphenyl)-1-[2-(2-methoxyphenyl)-4,5-diphenyl-2H-imidazol-2-yl]-1H-imidazole 7292-18-4 C32H28N4O2
1-(methoxymethyl)-1H-imidazole 1-(methoxymethyl)-1H-imidazole 20075-26-7 C5H8N2O
1-(tert-butyl)pyrrolidin-2-one 1-(tert-butyl)pyrrolidin-2-one 20687-53-0 C8H15NO
N-acetylsulphanilic acid N-acetylsulphanilic acid 121-62-0 C8H9NO4S
1-methyl-5-thioxopyrrolidin-2-one 1-methyl-5-thioxopyrrolidin-2-one 2043-24-5 C5H7NOS
1-(3-METHYLPHENYL)-2-OXO-3-PYRROLIDINEC& 1-(3-METHYLPHENYL)-2-OXO-3-PYRROLIDINEC& 618070-31-8 C12H13NO3
(S)-4-bromo-1-(pyrrolidin-3-yl)-1H-pyrazole hydrochloride (S)-4-bromo-1-(pyrrolidin-3-yl)-1H-pyrazole hydrochloride 2828444-32-0 C7H11BrClN3
2-Pyridinecarboximidic acid, 2-methylhydrazide 2-Pyridinecarboximidic acid, 2-methylhydrazide 28819-35-4 C7H10N4
(R)-4-iodo-1-(pyrrolidin-3-yl)-1H-pyrazole (R)-4-iodo-1-(pyrrolidin-3-yl)-1H-pyrazole
Pyrrolo[1,2-c]pyrimidine-3-carboxylic acid (9CI) Pyrrolo[1,2-c]pyrimidine-3-carboxylic acid (9CI) 251102-27-9 C8H6N2O2
Pyrrolidine, 2-(2-fluorophenyl)-4-methyl- (9CI) Pyrrolidine, 2-(2-fluorophenyl)-4-methyl- (9CI) 603068-40-2 C11H14FN
1H-Imidazole-1-propanoic acid, α-cyclopropyl-α-(methylamino)- 1H-Imidazole-1-propanoic acid, α-cyclopropyl-α-(methylamino)- 1338993-61-5 C10H15N3O2
1-Pyrrolidinecarboxylic acid, 3-(difluoromethyl)-4-hydroxy-, 1,1-dimethylethyl ester, (3R,4S)-rel- 1-Pyrrolidinecarboxylic acid, 3-(difluoromethyl)-4-hydroxy-, 1,1-dimethylethyl ester, (3R,4S)-rel- 2368911-11-7 C10H17F2NO3
2-Pyrrolidinemethanol, 1-methyl-4-(trifluoromethyl)-, (2S,4R)- 2-Pyrrolidinemethanol, 1-methyl-4-(trifluoromethyl)-, (2S,4R)- 2621932-86-1 C7H12F3NO
Methyl-6-chloro-5-nitronicotinate Methyl-6-chloro-5-nitronicotinate 59237-53-5 C7H5ClN2O4
2,2':6',2''-TERPYRIDINE-4,4',4''-TRICARBOXYLIC ACID 2,2':6',2''-TERPYRIDINE-4,4',4''-TRICARBOXYLIC ACID 216018-58-5 C18H11N3O6
5-[(S)-2,2-Dimethyltetrahydro-2H-pyran-4-yl]-1-[(1S,2S)-2-methyl-1-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)cyclopropyl]-1H-indole-2-carboxylic Acid 5-[(S)-2,2-Dimethyltetrahydro-2H-pyran-4-yl]-1-[(1S,2S)-2-methyl-1-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)cyclopropyl]-1H-indole-2-carboxylic Acid 2212021-83-3 C22H25N3O5
2,4-diamino-6-chloropyrimidine-1-oxide 2,4-diamino-6-chloropyrimidine-1-oxide
6-bromo-2-fluoro-3-(3-(pyrrolidin-1-yl)propoxy)benzonitrile 6-bromo-2-fluoro-3-(3-(pyrrolidin-1-yl)propoxy)benzonitrile
5-Bromo-quinazoline 5-Bromo-quinazoline 958452-00-1 C8H5BrN2
3-(1H-Benzimidazol-1-yl)propanenitrile 3-(1H-Benzimidazol-1-yl)propanenitrile 4414-84-0 C10H9N3
1-hydroxybenzotriazole monohydrate 1-hydroxybenzotriazole monohydrate C6H7N3O2
2-Bromo-5-fluoropyridine 1-oxide 2-Bromo-5-fluoropyridine 1-oxide 935534-39-7 C5H3BrFNO
3-[(2S)-1,2,3,6-tetrahydropyridin-2-yl]pyridine 3-[(2S)-1,2,3,6-tetrahydropyridin-2-yl]pyridine 581-49-7 C10H12N2
SMMC7721/FU SMMC7721/FU
3-amino-5-methyl-1H-pyrazole-4-carbonitrile 3-amino-5-methyl-1H-pyrazole-4-carbonitrile 5453-07-6 C5H6N4
(3R,4R)-N-Cbz-3,4-difluoropyrrolidine (3R,4R)-N-Cbz-3,4-difluoropyrrolidine 790658-58-1 C12H13F2NO2
1H-1,2,4-Triazole,1-phenyl-(6CI,7CI,8CI,9CI) 1H-1,2,4-Triazole,1-phenyl-(6CI,7CI,8CI,9CI) 13423-60-4 C8H7N3
1H-Benzimidazole-2-carboxylicacid,5-methyl-(9CI) 1H-Benzimidazole-2-carboxylicacid,5-methyl-(9CI) 99459-47-9 C9H8N2O2
1H-Benzimidazole,2-cyclopropyl-(9CI) 1H-Benzimidazole,2-cyclopropyl-(9CI) 16405-79-1 C10H10N2
1H-Benzimidazol-5-ol,2-amino-(9CI) 1H-Benzimidazol-5-ol,2-amino-(9CI) 51276-85-8 C7H7N3O
2-Butanone,4-(1H-benzimidazol-2-yl)-(9CI) 2-Butanone,4-(1H-benzimidazol-2-yl)-(9CI) 19276-01-8 C11H12N2O
(4-Pyrazol-1-ylphenyl)methanol (4-Pyrazol-1-ylphenyl)methanol 143426-49-7 C10H10N2O
2-(Hydroxymethyl)pyrrolidine 2-(Hydroxymethyl)pyrrolidine 498-63-5 C5H11NO
1-Benzyl-1H-pyrazol-4-amine 1-Benzyl-1H-pyrazol-4-amine 28466-62-8 C10H11N3
2-Phenyl-1H-benzo[d]imidazol-5-amine 2-Phenyl-1H-benzo[d]imidazol-5-amine 1767-25-5 C13H11N3
4-(4-CHLORO-6-METHYL-2-PYRIMIDINYL)MORPHOLINE 4-(4-CHLORO-6-METHYL-2-PYRIMIDINYL)MORPHOLINE 118121-82-7 C9H12ClN3O
ethyl4-chlorothieno[3,2-d]pyrimidine-6-carboxylate ethyl4-chlorothieno[3,2-d]pyrimidine-6-carboxylate 596794-87-5 C9H7ClN2O2S
5-AMINO-1-METHYLIMIDAZOLE 5-AMINO-1-METHYLIMIDAZOLE 66787-75-5 C4H7N3
Ethyl 2-(4-(tert-butoxycarbonyl)piperazin-1-yl)-4-hydroxypyrimidine-5-carboxylate Ethyl 2-(4-(tert-butoxycarbonyl)piperazin-1-yl)-4-hydroxypyrimidine-5-carboxylate 1065074-31-8 C16H24N4O5
6-Bromo-2-chloroquinazoline 6-Bromo-2-chloroquinazoline 882672-05-1 C8H4BrClN2
ethyl 6-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylate ethyl 6-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylate 860457-99-4 C11H9F3N2O2
Nornicotine-2-carboxylic Acid Nornicotine-2-carboxylic Acid 3562-11-6 C10H12N2O2
4-chloro-7-(4-methoxybenzyl)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine 4-chloro-7-(4-methoxybenzyl)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine 853680-76-9 C14H14ClN3O
Benzonitrile, 5-formyl-2-(4-methyl-1H-imidazol-1-yl)- Benzonitrile, 5-formyl-2-(4-methyl-1H-imidazol-1-yl)- 1170735-10-0 C12H9N3O
6,8-Dibromo-imidazo[1,2-a]pyrazine-2-carboxylic acid ethyl ester 6,8-Dibromo-imidazo[1,2-a]pyrazine-2-carboxylic acid ethyl ester 87597-21-5 C9H7Br2N3O2
1-(difluoromethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1-(difluoromethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1206640-82-5 C10H15BF2N2O2
Ethyl 4-Chloro-6-methyl-2-(methylthio)pyrimidine-5-carboxylate Ethyl 4-Chloro-6-methyl-2-(methylthio)pyrimidine-5-carboxylate 583878-42-6 C9H11ClN2O2S
2-(chloromethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one(SALTDATA: FREE) 2-(chloromethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one(SALTDATA: FREE) 796067-44-2 C10H9ClN2O
5-(trifluoromethyl)-2,3-dihydrospiro[indene-1,2'-pyrrolidine] 5-(trifluoromethyl)-2,3-dihydrospiro[indene-1,2'-pyrrolidine] 1211594-38-5 C13H14F3N
8-bromoimidazo[1,2-a]pyridine-2-carboxylic acid 8-bromoimidazo[1,2-a]pyridine-2-carboxylic acid 1026201-45-5 C8H5BrN2O2
1-(2-Bromo-5-fluorophenyl)pyrrolidin-2-one 1-(2-Bromo-5-fluorophenyl)pyrrolidin-2-one 1280786-54-0 C10H9BrFNO
2,4-Dihydroxy-6,7-diMethoxyquinazoline 2,4-Dihydroxy-6,7-diMethoxyquinazoline 20197-80-2 C12H14N2O4
3-chloro-1H-pyrazole 3-chloro-1H-pyrazole 14339-33-4 C3H3ClN2
N-(5-iodo-2-oxo-1,2-dihydropyriMidin-4-yl)benzaMide N-(5-iodo-2-oxo-1,2-dihydropyriMidin-4-yl)benzaMide 145913-85-5 C11H8IN3O2
[2,2':6',2''-terpyridine]-6,6''-dicarboxylic acid [2,2':6',2''-terpyridine]-6,6''-dicarboxylic acid 149982-11-6 C17H11N3O4
6-broMo-3-iodoH-iMidazo[1,2-a]pyridine 6-broMo-3-iodoH-iMidazo[1,2-a]pyridine 474706-74-6 C7H4BrIN2
R-3-CBZ-AMINO PYRROLIDINE-HCL R-3-CBZ-AMINO PYRROLIDINE-HCL 884653-79-6 C12H17ClN2O2
1H-Pyrazolo[4,3-d]pyriMidine, 3-(2-Methylpropyl)- 1H-Pyrazolo[4,3-d]pyriMidine, 3-(2-Methylpropyl)- 1346600-82-5 C9H12N4
IMidazo[1,2-a]pyridine-2-carboxylic acid, 6-cyano- IMidazo[1,2-a]pyridine-2-carboxylic acid, 6-cyano- 1020035-67-9 C9H5N3O2
1-(11bR)-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl- Pyrrolidine 1-(11bR)-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl- Pyrrolidine 736142-26-0 C24H20NO2P
4-Benzoylpyridine 4-Benzoylpyridine 14548-46-0 C12H9NO
(S)-5-broMo-3-((1-Methylpyrrolidin-2-yl)Methyl)-1H-indole (S)-5-broMo-3-((1-Methylpyrrolidin-2-yl)Methyl)-1H-indole 208464-41-9 C14H17BrN2
1H-BenziMidazole-5-carboxylic acid, 2-[[5-broMo-1-[[2-(triMethylsilyl)ethoxy]Methyl]-1H-indazol-3-yl]aMino]-1-[trans-4-[[(1,1-diMethylethyl)diMethylsilyl]oxy]cyclohexyl]-, ethyl ester 1H-BenziMidazole-5-carboxylic acid, 2-[[5-broMo-1-[[2-(triMethylsilyl)ethoxy]Methyl]-1H-indazol-3-yl]aMino]-1-[trans-4-[[(1,1-diMethylethyl)diMethylsilyl]oxy]cyclohexyl]-, ethyl ester 1012104-44-7 C35H52BrN5O4Si2
(2S,4S)-4-benzhydryl-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid (2S,4S)-4-benzhydryl-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid 959573-18-3 C23H27NO4
5-broMo-1,4-diMethyl-1H-iMidazole 5-broMo-1,4-diMethyl-1H-iMidazole 861325-16-8 C5H7BrN2
(R)-1-Boc-2-[Methoxy(Methyl)carbaMoyl]pyrrolidine (R)-1-Boc-2-[Methoxy(Methyl)carbaMoyl]pyrrolidine 288086-98-6 C12H22N2O4
3,7-Dibromodibenzo[b,d]thiophene 3,7-Dibromodibenzo[b,d]thiophene 83834-10-0 C12H6Br2S
4-BroMo-2-phenyl-oxazole 4-BroMo-2-phenyl-oxazole 861440-59-7 C9H6BrNO
4-Bromo-2-pyrrolidin-1-ylpyridine 4-Bromo-2-pyrrolidin-1-ylpyridine 1142194-47-5 C9H11BrN2
5-Bromo-2-chloro-4-methyl-7-azabenzimidazole 5-Bromo-2-chloro-4-methyl-7-azabenzimidazole 1388071-17-7 C7H5BrClN3
3-(2-Chlorophenyl)-5-methylisoxazole-4-carbonyl chloride 3-(2-Chlorophenyl)-5-methylisoxazole-4-carbonyl chloride 25629-50-9 C11H7Cl2NO2
2,4-Diphenyl-6-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1,3,5-triazine 2,4-Diphenyl-6-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1,3,5-triazine 1269508-31-7 C27H26BN3O2
2-(4-fluorophenyl)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-(4-fluorophenyl)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridine 1402172-82-0 C17H19BFNO2
8-BroMo-[1,2,4]triazolo[4,3-c]pyriMidine 8-BroMo-[1,2,4]triazolo[4,3-c]pyriMidine 1208084-77-8 C5H3BrN4
5-Fluoro-iMidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 5-Fluoro-iMidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 1352394-95-6 C10H9FN2O2
1-(6-BroMo-pyridin-2-yl)-pyrrolidin-2-one 1-(6-BroMo-pyridin-2-yl)-pyrrolidin-2-one 1027511-95-0 C9H9BrN2O
N-succiniMidyl 4-(2-pyridyldithio)pentanoate N-succiniMidyl 4-(2-pyridyldithio)pentanoate 341498-08-6 C14H16N2O4S2
5-chloro-2-(Methylthio)pyrido[4,3-d]pyriMidine 5-chloro-2-(Methylthio)pyrido[4,3-d]pyriMidine 1255099-52-5 C8H6ClN3S
7-broMo-2-Methoxythieno[3,2-d]pyriMidine 7-broMo-2-Methoxythieno[3,2-d]pyriMidine 1259978-35-2 C7H5BrN2OS
5-Acetylamino-6-amino-3-methyluracil-[13C4,15N3] (AAMU) 5-Acetylamino-6-amino-3-methyluracil-[13C4,15N3] (AAMU) 1173022-65-5 C7H10N4O3
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.