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
3,5,6-Trichloro-1,2,4-triazine 3,5,6-Trichloro-1,2,4-triazine 873-41-6 C3Cl3N3
4-Oxazolecarboxylic acid, 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, methyl ester 4-Oxazolecarboxylic acid, 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, methyl ester 1192056-44-2 C12H18BNO5
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
(R)-4,4',5,5'-tetrahydro-1H,1'H-3,3'-spirobi[benzo[cd]indole] (R)-4,4',5,5'-tetrahydro-1H,1'H-3,3'-spirobi[benzo[cd]indole]
4-Amino-2,3-dibromopyridine 4-Amino-2,3-dibromopyridine 861023-90-7 C5H4Br2N2
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
3-(2-Bromophenyl)-4H-1,2,4-triazole 3-(2-Bromophenyl)-4H-1,2,4-triazole 118863-61-9 C8H6BrN3
1-Acetyl-1H-indazole-6-boronic acid, pinacol ester 1-Acetyl-1H-indazole-6-boronic acid, pinacol ester 1256359-07-5 C15H19BN2O3
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
1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-4-amine 1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-4-amine 1153040-21-1 C10H8F3N3
2,6-diazaspiro[3.4]octan-7-one 2,6-diazaspiro[3.4]octan-7-one 1211515-65-9 C6H10N2O
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-{4-(trifluoromethyl)phenyl}-4-pyridinamine 2-{4-(trifluoromethyl)phenyl}-4-pyridinamine 849680-65-5 C12H9F3N2
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
4-broMo-2-(piperidin-3-yl)pyridine 4-broMo-2-(piperidin-3-yl)pyridine 1260756-26-0 C10H13BrN2
5-broMo-2-(piperidin-3-yl)pyridine 5-broMo-2-(piperidin-3-yl)pyridine 1256804-87-1 C10H13BrN2
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
1,4-diazabicyclo[4.2.0]octane 1,4-diazabicyclo[4.2.0]octane 31029-60-4 C6H12N2
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
N2,N2-diMethylpyridine-2,6-diaMine N2,N2-diMethylpyridine-2,6-diaMine 63763-86-0 C7H11N3
[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
(5R)- 5-Methyl-2-Pyrrolidinone (5R)- 5-Methyl-2-Pyrrolidinone 21395-93-7 C5H9NO
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
5-Methylthiophen-2-ol 5-Methylthiophen-2-ol 930-64-3 C5H6OS
4-Benzoylpyridine 4-Benzoylpyridine 14548-46-0 C12H9NO
2,4-Diiodooxazole 2,4-Diiodooxazole 1037597-73-1 C3HI2NO
4-Bromo-5-phenyl-1H-1,2,3-triazole 4-Bromo-5-phenyl-1H-1,2,3-triazole 21505-14-6 C8H6BrN3
(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
4,6-dichloro-5-fluoro-2-Methanesulfonyl-pyriMidine 4,6-dichloro-5-fluoro-2-Methanesulfonyl-pyriMidine 6450-17-5 C5H3Cl2FN2O2S
2-ThiophenaMine, 5-phenyl- 2-ThiophenaMine, 5-phenyl- 14770-85-5 C10H9NS
4-N,4-N-DIMETHYLPYRIDINE-2,4-DIAMINE 4-N,4-N-DIMETHYLPYRIDINE-2,4-DIAMINE 50426-31-8 C7H11N3
3,5-Dibromo-4-phenyl-4H-1,2,4-triazole 3,5-Dibromo-4-phenyl-4H-1,2,4-triazole 56616-82-1 C8H5Br2N3
2-(4-broMo-1H-iMidazol-1-yl)-4-chloropyridine 2-(4-broMo-1H-iMidazol-1-yl)-4-chloropyridine 1353855-82-9 C8H5BrClN3
(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-Chloro-2-(tetrahydro-2H-pyran-4-yl)pyriMidine 4-Chloro-2-(tetrahydro-2H-pyran-4-yl)pyriMidine 1159821-25-6 C9H11ClN2O
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
6-(Oxetan-3-yloxy)pyridin-3-amine 6-(Oxetan-3-yloxy)pyridin-3-amine 1349716-84-2 C8H10N2O2
3-(2-Chlorophenyl)-5-methylisoxazole-4-carbonyl chloride 3-(2-Chlorophenyl)-5-methylisoxazole-4-carbonyl chloride 25629-50-9 C11H7Cl2NO2
Methyl 3-Methylazetidine-3-carboxylate hydrochloride Methyl 3-Methylazetidine-3-carboxylate hydrochloride 1114876-08-2 C6H12ClNO2
5-Chloromethyl-1H-tetrazole 5-Chloromethyl-1H-tetrazole 55408-11-2 C2H3ClN4
4-Bromo-5-methyl-1H-pyrazol-3-amine 4-Bromo-5-methyl-1H-pyrazol-3-amine 1780-72-9 C4H6BrN3
1,3,5-Triazine, 2-[3-(8-chloro-1-naphthalenyl)phenyl]-4,6-diphenyl- 1,3,5-Triazine, 2-[3-(8-chloro-1-naphthalenyl)phenyl]-4,6-diphenyl- 3091378-79-6 C31H20ClN3
1-[2,5-Anhydro-4-C-(hydroxymethyl)-alpha-L-lyxofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione 1-[2,5-Anhydro-4-C-(hydroxymethyl)-alpha-L-lyxofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione 206055-67-6 C11H14N2O6
3-IODO-6-METHYL-IMIDAZO[1,2-A]PYRIDINE 3-IODO-6-METHYL-IMIDAZO[1,2-A]PYRIDINE 885276-23-3 C8H7IN2
5-Methoxyindole 5-Methoxyindole 1006-94-6 C9H9NO
2-(4-CHLORO-PHENYL)-IMIDAZO[1,2-A]PYRIDINE 2-(4-CHLORO-PHENYL)-IMIDAZO[1,2-A]PYRIDINE 38922-74-6 C13H9ClN2
4-(4-Chlorophenyl)-1H-1,2,3-triazole 4-(4-Chlorophenyl)-1H-1,2,3-triazole 5604-31-9 C8H6ClN3
3-BROMO-1-(TRIISOPROPYLSILYL)PYRROLE 3-BROMO-1-(TRIISOPROPYLSILYL)PYRROLE 87630-36-2 C13H24BrNSi
1-[(4-Nitrophenyl)methyl]pyrazole 1-[(4-Nitrophenyl)methyl]pyrazole 110525-57-0 C10H9N3O2
3,5-Diamino-1H-pyrazole 3,5-Diamino-1H-pyrazole 16082-33-0 C3H6N4
1-(4-Methoxyphenyl)-1H-pyrazol-4-amine 1-(4-Methoxyphenyl)-1H-pyrazol-4-amine 90840-04-3 C10H11N3O
1-(3-Methoxyphenyl)-1H-pyrazol-4-amine 1-(3-Methoxyphenyl)-1H-pyrazol-4-amine 91633-98-6 C10H11N3O
2-CHLORO-4-METHOXYQUINAZOLINE 2-CHLORO-4-METHOXYQUINAZOLINE 77767-98-7 C9H7ClN2O
1-(1,3-BENZODIOXOL-5-YL)CYCLOPROPANECARBOXYLIC ACID 1-(1,3-BENZODIOXOL-5-YL)CYCLOPROPANECARBOXYLIC ACID 862574-89-8 C11H10O4
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
2-(tetrahydrofuran-3-yloxy)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-(tetrahydrofuran-3-yloxy)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridine 1351529-85-5 C15H22BNO4
6-o-tolylpyridazin-3-aMine 6-o-tolylpyridazin-3-aMine 342047-25-0 C11H11N3
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
3-(4-(4,4,5,5-TetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)benzonitrile 3-(4-(4,4,5,5-TetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)benzonitrile 546142-08-9 C16H18BN3O2
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
5-bromo-1-cyclopropylpyridin-2(1H)-one 5-bromo-1-cyclopropylpyridin-2(1H)-one 1193334-67-6 C8H8BrNO
2-cyclopropyl-6-methyl-4-(4,4,5,5,-tetramethyl-1,3,2-dioxa-borolan-2-yl)-pyridine 2-cyclopropyl-6-methyl-4-(4,4,5,5,-tetramethyl-1,3,2-dioxa-borolan-2-yl)-pyridine 1309444-00-5 C15H22BNO2
2-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine 2-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine 1321518-17-5 C14H19BF3NO2
3-AMINO-4-BROMO-1-METHYLPYRAZOLE 3-AMINO-4-BROMO-1-METHYLPYRAZOLE 146941-72-2 C4H6BrN3
5-Methyl-1H-tetrazole 5-Methyl-1H-tetrazole 4076-36-2 C2H4N4
Pyridine, 2-chloro-4-nitro-6-(trifluoromethyl)- Pyridine, 2-chloro-4-nitro-6-(trifluoromethyl)- 1805474-54-7 C6H2ClF3N2O2
4H-1,2,4-Triazole, 3,5-dibromo-4-cyclopropyl- 4H-1,2,4-Triazole, 3,5-dibromo-4-cyclopropyl- 2171888-21-2 C5H5Br2N3
6-bromo-5-methyl-1H-imidazo[4,5-b]pyridine 6-bromo-5-methyl-1H-imidazo[4,5-b]pyridine 28279-41-6 C7H6BrN3
1,3,2-Dioxaborolane, 4,4,5,5-tetramethyl-2-(1-methylenepropyl)- 1,3,2-Dioxaborolane, 4,4,5,5-tetramethyl-2-(1-methylenepropyl)- 1403904-88-0 C10H19BO2
1,10-Phenanthroline, 2-bromo-9-methyl- 1,10-Phenanthroline, 2-bromo-9-methyl- 2103982-25-6 C13H9BrN2
2-(5-bromothiophen-2-yl)tetrahydrofuran 2-(5-bromothiophen-2-yl)tetrahydrofuran 1267501-91-6 C8H9BrOS
(-)-Menthyl (+)-2-pyrrolidone-5-carboxylate (-)-Menthyl (+)-2-pyrrolidone-5-carboxylate 68127-22-0 C15H25NO3
N-(6-amino-1,2,3,4-tetrahydro-1-methyl-2,4-dioxo-5-pyrimidinyl)formamide N-(6-amino-1,2,3,4-tetrahydro-1-methyl-2,4-dioxo-5-pyrimidinyl)formamide 14785-95-6 C6H8N4O3
2-(tetrahydrofuran-3-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-(tetrahydrofuran-3-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2222997-71-7 C13H20BNO3S
tert-butyl 3-(5-bromo-2-methoxypyridin-3-yl)azetidine-1-carboxylate tert-butyl 3-(5-bromo-2-methoxypyridin-3-yl)azetidine-1-carboxylate 2294947-20-7 C14H19BrN2O3
tert-Butyl 4H-1,4-oxazine-4-carboxylate tert-Butyl 4H-1,4-oxazine-4-carboxylate 943818-61-9 C9H13NO3
2,4,5-trimethylpyridine 2,4,5-trimethylpyridine 1122-39-0 C8H11N
4-methyloxazole 4-methyloxazole 693-93-6 C4H5NO
1-Azetidinecarboxylic acid, 3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-pyridinyl]-, 1,1-dimethylethyl ester 1-Azetidinecarboxylic acid, 3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-pyridinyl]-, 1,1-dimethylethyl ester 2223037-02-1 C19H29BN2O4
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
张家口市| 社旗县| 南郑县| 津市市| 大同市| 乐都县| 怀宁县| 合川市| 康保县| 海林市| 太原市| 贵定县| 黔南| 新乐市| 大埔县| 盐源县| 上蔡县| 罗山县| 澜沧| 威远县| 普洱| 东阳市| 宜阳县| 南通市| 娄底市| 松阳县| 荆州市| 卢龙县| 两当县| 游戏| 苏尼特右旗| 涿鹿县| 西林县| 灵武市| 迁安市| 灵石县| 正阳县| 黑山县| 枞阳县| 黄浦区| 印江|