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
7-BroMo-3-MethyliMidazo[1,5-a]pyridine 7-BroMo-3-MethyliMidazo[1,5-a]pyridine 1379355-19-7 C8H7BrN2
3-BroMo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic acid 3-BroMo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic acid 500011-86-9 C9H5BrClN3O2
1H-Pyrazolo[3,4-d]pyrimidine-4-carboxylic acid 1H-Pyrazolo[3,4-d]pyrimidine-4-carboxylic acid 1095822-28-8 C6H4N4O2
Pyridine, 4-[2-(1H-iMidazol-2-yl)phenyl]- Pyridine, 4-[2-(1H-iMidazol-2-yl)phenyl]- 608515-26-0 C14H11N3
1,4,7-tris[(4-Methylphenyl)sulfonyl]-1,4,7-triazonane 1,4,7-tris[(4-Methylphenyl)sulfonyl]-1,4,7-triazonane 52667-89-7 C27H33N3O6S3
4-METHYL-2-(1-PHENYLETHYL)-1,3-DIOXOLANE 4-METHYL-2-(1-PHENYLETHYL)-1,3-DIOXOLANE 67634-23-5 C12H16O2
1-(2-HydroxyMethyl-pyrrolidin-1-yl)-ethanone 1-(2-HydroxyMethyl-pyrrolidin-1-yl)-ethanone 27822-68-0 C7H13NO2
1-Acetyl-pyrrolidin-3-one 1-Acetyl-pyrrolidin-3-one 34086-58-3 C6H9NO2
1-tert-butyl-5-phenyl-1H-pyrazole 1-tert-butyl-5-phenyl-1H-pyrazole 1204355-48-5 C13H16N2
4-broMo-1-Methyl-1H-pyrazolo[3,4-c]pyridine 4-broMo-1-Methyl-1H-pyrazolo[3,4-c]pyridine 1032943-41-1 C7H6BrN3
1-Methyl-1-thiophen-2-yl-ethylaMine 1-Methyl-1-thiophen-2-yl-ethylaMine 81289-15-8 C7H11NS
4H-IMidazo[4,5-c]pyridin-4-one, 7-broMo-1,5-dihydro- 4H-IMidazo[4,5-c]pyridin-4-one, 7-broMo-1,5-dihydro- 163452-70-8 C6H4BrN3O
IMidazo[1,2-a]pyridin-6-aMine, 2-Methyl- IMidazo[1,2-a]pyridin-6-aMine, 2-Methyl- 860258-05-5 C8H9N3
7-chloro-5-(Methylthio)iMidazo[1,2-c]pyriMidine 7-chloro-5-(Methylthio)iMidazo[1,2-c]pyriMidine 872059-27-3 C7H6ClN3S
2-(chloroMethyl)-6-(trifluoroMethyl)pyridine 2-(chloroMethyl)-6-(trifluoroMethyl)pyridine 849094-03-7 C7H5ClF3N
2-ethynyl-5-Methylpyridine 2-ethynyl-5-Methylpyridine 30413-61-7 C8H7N
tert-Butyl ((1H-benzo[d]imidazol-2-yl)methyl)carbamate tert-Butyl ((1H-benzo[d]imidazol-2-yl)methyl)carbamate 189560-83-6 C13H17N3O2
5-(2-isopropyl-4-Methoxy-phenoxy)-pyriMidine-2,4-diaMine 5-(2-isopropyl-4-Methoxy-phenoxy)-pyriMidine-2,4-diaMine 865304-71-8 C14H18N4O2
3,5-dimethylpyridin-4-ol 3,5-dimethylpyridin-4-ol 71755-73-2 C7H9NO
6-fluoro-3-(4-(3-Methoxy-4-(4-Methyl-1H-iMidazol-1-yl)phenyl)-1H-1,2,3-triazol-1-yl)-4,5-dihydro-1H-benzo[b]azepin-2(3H)-one 6-fluoro-3-(4-(3-Methoxy-4-(4-Methyl-1H-iMidazol-1-yl)phenyl)-1H-1,2,3-triazol-1-yl)-4,5-dihydro-1H-benzo[b]azepin-2(3H)-one 1093978-67-6 C23H21FN6O2
1,2-Pyrrolidinedicarboxylic acid, 5-hydroxy-, 1-(1,1-diMethylethyl) 2-Methyl ester, (2S)- 1,2-Pyrrolidinedicarboxylic acid, 5-hydroxy-, 1-(1,1-diMethylethyl) 2-Methyl ester, (2S)- 188200-05-7 C11H19NO5
4-PyriMidinecarboxylic acid, 6-aMino-5-chloro-, ethyl ester 4-PyriMidinecarboxylic acid, 6-aMino-5-chloro-, ethyl ester 1097250-86-6 C7H8ClN3O2
3-Pyridinecarbonitrile, 5-broMo-6-Methyl- 3-Pyridinecarbonitrile, 5-broMo-6-Methyl- 1256792-16-1 C7H5BrN2
2-Chloro-1H-imidazole 2-Chloro-1H-imidazole 16265-04-6 C3H3ClN2
1-(Piperidin-4-yl)pyrrolidin-2-one HCl 1-(Piperidin-4-yl)pyrrolidin-2-one HCl 548769-02-4 C9H17ClN2O
3-BroMo-4-nitropyrazole 3-BroMo-4-nitropyrazole 784193-37-9 C3H2BrN3O2
5-Methoxy-pyridine-2-sulfonyl chloride 5-Methoxy-pyridine-2-sulfonyl chloride 1060801-83-3 C6H6ClNO3S
3-broMo-5-cyclobutylpyridine 3-broMo-5-cyclobutylpyridine 1314353-90-6 C9H10BrN
6-cyclobutylpyridin-2-aMine 6-cyclobutylpyridin-2-aMine 1159817-43-2 C9H12N2
Pyrido[4,3-d]pyriMidine-2,4(1H,3H)-dione Pyrido[4,3-d]pyriMidine-2,4(1H,3H)-dione 16952-65-1 C7H5N3O2
ethyl 5-aMino-2-chloropyriMidine-4-carboxylate ethyl 5-aMino-2-chloropyriMidine-4-carboxylate 59950-50-4 C7H8ClN3O2
1-(CyclopropylMethyl)pyrazole 1-(CyclopropylMethyl)pyrazole 1344382-51-9 C7H10N2
Bromazolam Bromazolam 71368-80-4 C17H13BrN4
4,5-dibroMo-1-Methyl-1H-1,2,3-triazole 4,5-dibroMo-1-Methyl-1H-1,2,3-triazole 25537-64-8 C3H3Br2N3
5-BroMo-4-chloronicotinonitrile 5-BroMo-4-chloronicotinonitrile 1160923-98-7 C6H2BrClN2
3-(1H-Indol-2-yl)propanoic acid 3-(1H-Indol-2-yl)propanoic acid 5836-08-8 C11H11NO2
Spiro[pyrrolidine-2,7'(6'H)-[2H]pyrrolo[2,1-b][1,3]thiazine]-1,4'-dicarboxylic acid, tetrahydro-6'-oxo-, 1-(1,1-diMethylethyl) 4'-Methyl ester, (2R,4'R,8'aR)- Spiro[pyrrolidine-2,7'(6'H)-[2H]pyrrolo[2,1-b][1,3]thiazine]-1,4'-dicarboxylic acid, tetrahydro-6'-oxo-, 1-(1,1-diMethylethyl) 4'-Methyl ester, (2R,4'R,8'aR)- 221040-37-5 C17H26N2O5S
Senexin A Senexin A 1366002-50-7 C17H14N4
di-tert-butyl (4-chloropyriMidin-2-yl)carbaMate di-tert-butyl (4-chloropyriMidin-2-yl)carbaMate 1464788-84-8 C14H20ClN3O4
2-Hydroxy-3-(thiophen-2-yl)pyridine 2-Hydroxy-3-(thiophen-2-yl)pyridine 30236-48-7 C9H7NOS
tert-butyl 4-broMo-5,6-dihydropyridine-1(2H)-carboxylate tert-butyl 4-broMo-5,6-dihydropyridine-1(2H)-carboxylate 159503-91-0 C10H16BrNO2
7-Bromo-2-methylimidazo[1,2-a]-pyridine-3-carboxylic acid 7-Bromo-2-methylimidazo[1,2-a]-pyridine-3-carboxylic acid 1159831-07-8 C9H7BrN2O2
1-Hydroxy-1,3-dihydro-2,1-benzoxaborole-6-carboxylic acid 1-Hydroxy-1,3-dihydro-2,1-benzoxaborole-6-carboxylic acid 1221343-14-1 C8H7BO4
2,4-dichloro-5,7-dihydrothieno[3,4-d]pyriMidine 2,4-dichloro-5,7-dihydrothieno[3,4-d]pyriMidine 74901-71-6 C6H4Cl2N2S
N,N-diethyl-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-aMine N,N-diethyl-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-aMine 1351231-77-0 C15H25BN2O2
6-BroMo-iMidazo[1,2-a]pyriMidine-2-carboxylic acid 6-BroMo-iMidazo[1,2-a]pyriMidine-2-carboxylic acid 907945-69-1 C7H4BrN3O2
FMoc-α-Me-D-Pro-OH FMoc-α-Me-D-Pro-OH 1286768-33-9 C21H21NO4
3-BroMo-1,4-diMethyl-1H-pyrazole 3-BroMo-1,4-diMethyl-1H-pyrazole 13745-59-0 C5H7BrN2
2-Bromo-4-(3-methyl-1H-pyrazol-1-yl)pyridine 2-Bromo-4-(3-methyl-1H-pyrazol-1-yl)pyridine 1159817-68-1 C9H8BrN3
2-(tert-butyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine 2-(tert-butyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine 1403387-91-6 C16H23BF3NO2
2-CHLORO-IMIDAZO[1,2-A]PYRIDINE-3-CARBOXYLIC ACID 2-CHLORO-IMIDAZO[1,2-A]PYRIDINE-3-CARBOXYLIC ACID 522604-25-7 C8H5ClN2O2
BOC-3-FLUORO-4-OXOPYRROLIDINE BOC-3-FLUORO-4-OXOPYRROLIDINE 845894-03-3 C9H14FNO3
4-Bromo-2-(2-fluorophenyl)thiazole 4-Bromo-2-(2-fluorophenyl)thiazole 1159815-08-3 C9H5BrFNS
3-ETHYL-4-IODO-1H-PYRAZOLE 3-ETHYL-4-IODO-1H-PYRAZOLE 442876-19-9 C5H7IN2
1-[2-(azetidin-1-yl)ethyl]-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1-[2-(azetidin-1-yl)ethyl]-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1422126-12-2 C14H24BN3O2
7-Chloro-6-iodoimidazo[1,2-a]pyrimidin-5(1H)-one 7-Chloro-6-iodoimidazo[1,2-a]pyrimidin-5(1H)-one 1799434-64-2 C6H3ClIN3O
6-(3-Methoxyphenyl)pyrimidin-4-amine 6-(3-Methoxyphenyl)pyrimidin-4-amine 1192814-08-6 C11H11N3O
2,4,8,10-Tetraoxaspiro[5.5]undecane, 3,9-diethylidene- 2,4,8,10-Tetraoxaspiro[5.5]undecane, 3,9-diethylidene- 65967-52-4 C11H16O4
2-BROMO-6-(PYRROLIDIN-2-YL)PYRIDINE 2-BROMO-6-(PYRROLIDIN-2-YL)PYRIDINE 1256834-84-0 C9H11BrN2
2-CHLORO-5-HYDROXY-3-METHYLPYRIMIDIN-4(3H)-ONE 2-CHLORO-5-HYDROXY-3-METHYLPYRIMIDIN-4(3H)-ONE 1333240-10-0 C5H5ClN2O2
2-(2-cyclopropyl-4-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(2-cyclopropyl-4-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2223029-70-5 C15H20BFO2
5-Bromo-4-(3-(trifluoromethyl)phenyl)thiazol-2-amine 5-Bromo-4-(3-(trifluoromethyl)phenyl)thiazol-2-amine 186982-44-5 C10H6BrF3N2S
1-isopropylpyrimidine-2,4,6(1H,3H,5H)-trione 1-isopropylpyrimidine-2,4,6(1H,3H,5H)-trione 69998-14-7 C7H10N2O3
5-isopropoxypyridin-2-amine 5-isopropoxypyridin-2-amine 846549-59-5 C8H12N2O
2,4-dichloro-6-[4-(trifluoromethyl)phenyl]Pyrimidine 2,4-dichloro-6-[4-(trifluoromethyl)phenyl]Pyrimidine 879608-91-0 C11H5Cl2F3N2
6-(3-methoxyphenyl)imidazo[2,1-b]thiazole 6-(3-methoxyphenyl)imidazo[2,1-b]thiazole 92754-06-8 C12H10N2OS
2-BROMO-1-(TETRAHYDRO-2H-PYRAN-2-YL)-1H-IMIDAZOLE 2-BROMO-1-(TETRAHYDRO-2H-PYRAN-2-YL)-1H-IMIDAZOLE 1065483-60-4 C8H11BrN2O
6-cyclohexyl-3-Pyridinol 6-cyclohexyl-3-Pyridinol 1058159-15-1 C11H15NO
5-sec-butylpyridin-2-amine 5-sec-butylpyridin-2-amine 1028854-30-9 C9H14N2
1-(4-methoxybenzofuran-2-yl)ethanone 1-(4-methoxybenzofuran-2-yl)ethanone 59445-59-9 C11H10O3
3-bromo-5-(1H-pyrazol-4-yl)Pyridine 3-bromo-5-(1H-pyrazol-4-yl)Pyridine 1086066-04-7 C8H6BrN3
5-(4-bromophenyl)-1H-1,2,3-triazole 5-(4-bromophenyl)-1H-1,2,3-triazole 5301-98-4 C8H6BrN3
3-bromo-7-chloro-Thieno[3,2-b]pyridine 3-bromo-7-chloro-Thieno[3,2-b]pyridine 1334645-51-0 C7H3BrClNS
2-(furan-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-(furan-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 1416263-21-2 C13H16BNO3S
2-(1H-pyrrol-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-(1H-pyrrol-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 1433178-41-6 C13H17BN2O2S
4-(hydroxymethyl)dihydrofuran-2(3H)-one 4-(hydroxymethyl)dihydrofuran-2(3H)-one 36679-81-9 C5H8O3
7-benzenesulfonyl-4-chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine 7-benzenesulfonyl-4-chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine 208459-84-1 C12H7ClIN3O2S
tert-butyl 4-(6-aminopyridin-2-yl)piperidine-1-carboxylate tert-butyl 4-(6-aminopyridin-2-yl)piperidine-1-carboxylate 478366-40-4 C15H23N3O2
4-ethyl-6-methyl-2(1H)-Pyridinone 4-ethyl-6-methyl-2(1H)-Pyridinone 50549-37-6 C8H11NO
2-chloro-3-(pyridin-4-yl)pyridine 2-chloro-3-(pyridin-4-yl)pyridine 1187968-06-4 C10H7ClN2
5-(2-pyridinyl)-2-Thiazolamine 5-(2-pyridinyl)-2-Thiazolamine 1215073-56-5 C8H7N3S
tert-butyl 5-tert-butylpyridin-2-ylcarbamate tert-butyl 5-tert-butylpyridin-2-ylcarbamate 1217417-46-3 C14H22N2O2
6-(3-fluorophenyl)pyridazin-3(2H)-one 6-(3-fluorophenyl)pyridazin-3(2H)-one 66549-07-3 C10H7FN2O
2-(4-fluorophenyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2-(4-fluorophenyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 1402174-41-7 C15H17BFNO2S
2-(4-(2H-tetrazol-5-yl)phenoxy)-5-chloro-3-fluoropyridine 2-(4-(2H-tetrazol-5-yl)phenoxy)-5-chloro-3-fluoropyridine 1799681-96-1 C12H7ClFN5O
4-(6-Amino-pyridin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester 4-(6-Amino-pyridin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester 1206248-85-2 C14H22N4O2
1-Methylpyrrolidin-3-amine hydrochloride 1-Methylpyrrolidin-3-amine hydrochloride 1538307-77-5 C5H13ClN2
7-(4-Methoxybenzyl)-5-Methyl-3-(Phenylamino)-2H-Pyrazolo[3,4-D]Pyrimidine-4,6(5H,7H)-Dione 7-(4-Methoxybenzyl)-5-Methyl-3-(Phenylamino)-2H-Pyrazolo[3,4-D]Pyrimidine-4,6(5H,7H)-Dione 1160521-51-6 C20H19N5O3
3,3'-Methylenebis(1-tert-butyl-3-imidazolium Bromide) 3,3'-Methylenebis(1-tert-butyl-3-imidazolium Bromide) 247902-48-3 C15H26Br2N4
6-Methylimidazo[1,2-a]pyrimidine-3-carboxylic acid 6-Methylimidazo[1,2-a]pyrimidine-3-carboxylic acid 1020035-04-4 C8H7N3O2
1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(fluorosulfonyl)imide 1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(fluorosulfonyl)imide 1235234-47-5 C8H18F2N2O5S2
1-Methylimidazole 1-Methylimidazole 616-47-7 C4H6N2
2-Cyclopropyl-4-iodo-1-isopropyl-1H-imidazole 2-Cyclopropyl-4-iodo-1-isopropyl-1H-imidazole 824431-88-1 C9H13IN2
tert-butyl 3-[4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]pyrrolidine-1-carboxylate tert-butyl 3-[4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]pyrrolidine-1-carboxylate 1359974-18-7 C18H30BN3O4
4-CHLORO-6,7-DIETHOXY-QUINAZOLINE 4-CHLORO-6,7-DIETHOXY-QUINAZOLINE 162363-46-4 C12H13ClN2O2
2-Ethyl-4-methylimidazole 2-Ethyl-4-methylimidazole 931-36-2 C6H10N2
trans-4-fluoro-3-hydroxypyrrolidine hydrochloride trans-4-fluoro-3-hydroxypyrrolidine hydrochloride 2006333-41-9 C4H9ClFNO
9,9'-Bis([1,1'-biphenyl]-3-yl)-3,3'-bi-9H-carbazole 9,9'-Bis([1,1'-biphenyl]-3-yl)-3,3'-bi-9H-carbazole 1352040-89-1 C48H32N2
4-(5-Bromopyridin-3-yl)-benzonitrile 4-(5-Bromopyridin-3-yl)-benzonitrile 1563530-51-7 C12H7BrN2
1-Oxa-6-azaspiro[3.4]octane hemioxalate 1-Oxa-6-azaspiro[3.4]octane hemioxalate 1523618-30-5 C14H24N2O6
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
蒲城县| 区。| 永兴县| 洞头县| 舞阳县| 天台县| 如皋市| 卓尼县| 曲靖市| 偏关县| 水城县| 彩票| 连州市| 锡林郭勒盟| 山阴县| 衢州市| 平乐县| 沁水县| 英超| 抚州市| 静安区| 永年县| 民和| 克拉玛依市| 威远县| 兴安县| 丰顺县| 师宗县| 普陀区| 杂多县| 米脂县| 繁昌县| 印江| 武宁县| 西青区| 周口市| 黄浦区| 弥勒县| 通渭县| 林口县| 金华市|