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-chloro-2-(pyrrolidin-3-yloxy)pyridine 3-chloro-2-(pyrrolidin-3-yloxy)pyridine 817187-51-2 C9H11ClN2O
PS1037 PS1037 908864-14-2 C17H25N5O2
(2S,4R)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide hydrochloride (2S,4R)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide hydrochloride 1448189-90-9 C16H20ClN3O2S
(2R,4S)-4-FLUORO-2-METHYLPYRROLIDINE HCL (2R,4S)-4-FLUORO-2-METHYLPYRROLIDINE HCL 1951424-96-6 C5H11ClFN
ETHYL 2-BROMO-4-CHLORO-1H-IMIDAZOLE-5-CARBOXYLATE ETHYL 2-BROMO-4-CHLORO-1H-IMIDAZOLE-5-CARBOXYLATE 1956318-26-5 C6H6BrClN2O2
6-BROMO-3-METHYLBENZODISOXAZOLE 6-BROMO-3-METHYLBENZODISOXAZOLE 66033-69-0 C8H6BrNO
2-(1,1,2,3,3,3-HEXAFLUOROPROPYL)TETRAHYDROFURAN 2-(1,1,2,3,3,3-HEXAFLUOROPROPYL)TETRAHYDROFURAN 53005-42-8 C7H8F6O
BOC-D-NVA-OSU BOC-D-NVA-OSU 213178-93-9 C14H22N2O6
3-Chloro-2-(trifluoromethyl)-pyridine 3-Chloro-2-(trifluoromethyl)-pyridine 749875-32-9 C6H3ClF3N
Spiro[cyclohexane-1,3'(1'H)-furo[3,4-c]pyridine]-1',4-dione Spiro[cyclohexane-1,3'(1'H)-furo[3,4-c]pyridine]-1',4-dione 328233-20-1 C12H11NO3
5-(BROMOMETHYL)-3-METHYLISOXAZOLE 5-(BROMOMETHYL)-3-METHYLISOXAZOLE 36958-61-9 C5H6BrNO
4-(CHLOROMETHYL)-2-(2-FURYL)-1,3-THIAZOLE 4-(CHLOROMETHYL)-2-(2-FURYL)-1,3-THIAZOLE 13386-49-7 C8H6ClNOS
4-BROMO-6-CHLORO-1H-INDAZOLE 4-BROMO-6-CHLORO-1H-INDAZOLE 885519-03-9 C7H4BrClN2
(S)-2-N-BOC-AMINOMETHYLPYRROLIDINE (S)-2-N-BOC-AMINOMETHYLPYRROLIDINE 141774-70-1 C10H20N2O2
(4-(10H-spiro[acridine-9,9'-xanthen]-10-yl)butyl)phosphonic acid (4-(10H-spiro[acridine-9,9'-xanthen]-10-yl)butyl)phosphonic acid 3038481-17-0 C29H26NO4P
2-(4-FLUOROPHENYL)IMIDAZO[1,2-A]PYRIMIDINE-3-CARBALDEHYDE 2-(4-FLUOROPHENYL)IMIDAZO[1,2-A]PYRIMIDINE-3-CARBALDEHYDE 878436-47-6 C13H8FN3O
2-PHENYL-PYRROLIDINE-3-CARBOXYLIC ACID 2-PHENYL-PYRROLIDINE-3-CARBOXYLIC ACID 1241684-17-2 C11H13NO2
(S)-2-(Aminomethyl)-1-(tert-butoxycarbonyl)pyrrolidine (S)-2-(Aminomethyl)-1-(tert-butoxycarbonyl)pyrrolidine 119020-01-8 C10H20N2O2
6-bromo-1,2-benzoxazole 6-bromo-1,2-benzoxazole 1060802-88-1 C7H4BrNO
6-Fluoro-7-azaindole 6-Fluoro-7-azaindole 898746-42-4 C7H5FN2
N-[(2S)-2-Pyrrolidinylmethyl]-trifluoromethanesulfonamide N-[(2S)-2-Pyrrolidinylmethyl]-trifluoromethanesulfonamide 782495-18-5 C6H11F3N2O2S
morpholine morpholine 99108-56-2 C4H9NO
yclopropanecarboxylic acid N-[4-[[4-chloro-6-(5-methyl-2H-pyrazol-3-ylamino)pyrimidin-2-yl]sulfanyl]phenyl]amide yclopropanecarboxylic acid N-[4-[[4-chloro-6-(5-methyl-2H-pyrazol-3-ylamino)pyrimidin-2-yl]sulfanyl]phenyl]amide 639090-55-4 C18H17ClN6OS
3-methyl-5-nitro-1H-pyrazole 3-methyl-5-nitro-1H-pyrazole 1048925-02-5 C4H5N3O2
3,4-Dithia-7H-cyclopenta[a]pentalene 3,4-Dithia-7H-cyclopenta[a]pentalene 389-58-2 C9H6S2
7-BROMO-4-METHYL-3,4-DIHYDRO-1H-BENZO[E][1,4]DIAZEPINE-2,5-DIONE 7-BROMO-4-METHYL-3,4-DIHYDRO-1H-BENZO[E][1,4]DIAZEPINE-2,5-DIONE 78756-36-2 C10H9BrN2O2
3-(3-BROMO-PHENYL)-ISOXAZOL-5-YLAMINE 3-(3-BROMO-PHENYL)-ISOXAZOL-5-YLAMINE 119162-52-6 C9H7BrN2O
4-CHLORO-7-(TRIFLUOROMETHYL)QUINAZOLINE 4-CHLORO-7-(TRIFLUOROMETHYL)QUINAZOLINE 16499-65-3 C9H4ClF3N2
PANACENE PANACENE 66389-39-7 C15H15BrO2
ETHYL 4,5-DIHYDRO-4-OXO-1H-PYRROLO[3,2-D]PYRIMIDINE-7-CARBOXYLATE ETHYL 4,5-DIHYDRO-4-OXO-1H-PYRROLO[3,2-D]PYRIMIDINE-7-CARBOXYLATE 853058-41-0 C9H9N3O3
4-TERT-BUTYL-1H-IMIDAZOL-2-AMINE 4-TERT-BUTYL-1H-IMIDAZOL-2-AMINE 82560-19-8 C7H13N3
1H,1'H-5,5'-BIBENZO[D]IMIDAZOLE 1H,1'H-5,5'-BIBENZO[D]IMIDAZOLE 3097-03-8 C14H10N4
2-BROMO-4-NITROTHIAZOLE 2-BROMO-4-NITROTHIAZOLE 41731-79-7 C3HBrN2O2S
(R)-1-BOC-3-(3-CARBOXY-PHENOXY)-PYRROLIDINE (R)-1-BOC-3-(3-CARBOXY-PHENOXY)-PYRROLIDINE 222987-19-1 C16H21NO5
5,6-DIHYDROSPIRO[CYCLOPENTA[C]PYRIDINE-7,2'-PYRROLIDINE] 5,6-DIHYDROSPIRO[CYCLOPENTA[C]PYRIDINE-7,2'-PYRROLIDINE] 463303-91-5 C11H14N2
2,4-DICHLORO-7-(TRIFLUOROMETHYL)QUINAZOLINE 2,4-DICHLORO-7-(TRIFLUOROMETHYL)QUINAZOLINE 396-02-1 C9H3Cl2F3N2
3-(6-BROMOPYRIDIN-2-YL)-6-CHLOROIMIDAZO[1,2-A]PYRIDINE 3-(6-BROMOPYRIDIN-2-YL)-6-CHLOROIMIDAZO[1,2-A]PYRIDINE 1044733-65-4 C12H7BrClN3
Imidazo[1,2-a]pyridin-2(3H)-one hydrochloride Imidazo[1,2-a]pyridin-2(3H)-one hydrochloride 52687-85-1 C7H6N2O.HCl
4-(Tributylstannyl)pyrimidine 4-(Tributylstannyl)pyrimidine 332133-92-3 C16H30N2Sn
1,3-Dihydro-7-nitro-2H-imidazo[4,5-c]pyridin-2-one 1,3-Dihydro-7-nitro-2H-imidazo[4,5-c]pyridin-2-one 61719-60-6 C6H4N4O3
2,2,2-trifluoro-1-(6-iodo-1,2,3,4-tetrahydroisoquinolin-2-yl)ethan-1-one 2,2,2-trifluoro-1-(6-iodo-1,2,3,4-tetrahydroisoquinolin-2-yl)ethan-1-one 1221257-53-9
1-Bromo-5-phenylnaphthalene 1-Bromo-5-phenylnaphthalene 911836-38-9 C16H11Br
5-Bromo-4-tert-butylpyrimidine 5-Bromo-4-tert-butylpyrimidine 1439-08-3 C8H11BrN2
ethyl 1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate ethyl 1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate 536759-91-8 C22H20N4O6
2-(4-BROMOBENZYL)-1H-BENZIMIDAZOLE 2-(4-BROMOBENZYL)-1H-BENZIMIDAZOLE 100622-41-1 C14H11BrN2
4-Amino-2-chloro-6-methyl-5-nitropyrimidine ,98% 4-Amino-2-chloro-6-methyl-5-nitropyrimidine ,98% C5H5ClN4O2
2-Methylindole-3-ethylamine 2-Methylindole-3-ethylamine 2731-06-8 C11H14N2
(Diacetoxyiodo)benzene (Diacetoxyiodo)benzene 3240-34-4 C10H11IO4
(S)-2-(2-CHLOROPHENYL)PYRROLIDINE (S)-2-(2-CHLOROPHENYL)PYRROLIDINE 1217788-99-2 C10H12ClN
5-Methyl-3-vinyl-2-oxazolidinone 5-Methyl-3-vinyl-2-oxazolidinone 3395-98-0 C6H9NO2
5-OXO-5-PYRROLIDIN-1-YL-PENTANOIC ACID 5-OXO-5-PYRROLIDIN-1-YL-PENTANOIC ACID 5724-80-1 C9H15NO3
Fluorodi(4-morpholinyl)phosphine oxide Fluorodi(4-morpholinyl)phosphine oxide 565-25-3 C8H16FN2O3P
5-AMINO-1,3-DIMETHYL-1,3-DIHYDRO-BENZOIMIDAZOL-2-ONE 5-AMINO-1,3-DIMETHYL-1,3-DIHYDRO-BENZOIMIDAZOL-2-ONE 53439-88-6 C9H11N3O
1-(Prop-2-yn-1-yl)pyrrolidine 1-(Prop-2-yn-1-yl)pyrrolidine 5799-76-8 C7H11NO
3-N-Boc-3-N-Methylaminopyrrolidine 3-N-Boc-3-N-Methylaminopyrrolidine 172478-00-1 C10H20N2O2
1-METHYLPIPERIDINE-4-CARBOXAMIDE 1-METHYLPIPERIDINE-4-CARBOXAMIDE 62718-28-9 C7H14N2O
Cyclopentane-1,2-dicarboximude Cyclopentane-1,2-dicarboximude 5763-44-0 C7H9NO2
Sucralose 6-Acetate Sucralose 6-Acetate 105066-21-5 C14H21Cl3O9
Naphtho[2,3-B]benzofuran-1-ylboronic acid Naphtho[2,3-B]benzofuran-1-ylboronic acid 2261008-21-1 C16H11BO3
1H-Indene, 5-[4'-[difluoro(3,4,5-trifluorophenoxy)methyl]-2,3',5'-trifluoro[1,1'-biphenyl]-4-yl]-2-ethyl-2,3-dihydro- 1H-Indene, 5-[4'-[difluoro(3,4,5-trifluorophenoxy)methyl]-2,3',5'-trifluoro[1,1'-biphenyl]-4-yl]-2-ethyl-2,3-dihydro- 1357385-66-0 C30H20F8O
2,5-Oxazolidinedione, 4-[[1-(2,4-dinitrophenyl)-1H-imidazol-4-yl]methyl]-, (4S)- 2,5-Oxazolidinedione, 4-[[1-(2,4-dinitrophenyl)-1H-imidazol-4-yl]methyl]-, (4S)- 47444-62-2 C13H9N5O7
Thalidomide-NH-CH2-COOH Thalidomide-NH-CH2-COOH 927670-97-1 C15H13N3O6
5H-Pyrazolo[4,3-c]pyridine-5-carboxylic acid, 3-(2,3-dihydro-2-oxo-1H-imidazol-1-yl)-2-(4-fluoro-3,5-dimethylphenyl)-2,4,6,7-tetrahydro-4-methyl-, 1,1-dimethylethyl ester, (4S)- 5H-Pyrazolo[4,3-c]pyridine-5-carboxylic acid, 3-(2,3-dihydro-2-oxo-1H-imidazol-1-yl)-2-(4-fluoro-3,5-dimethylphenyl)-2,4,6,7-tetrahydro-4-methyl-, 1,1-dimethylethyl ester, (4S)- 2212021-61-7 C23H28FN5O3
2H-1-Benzopyran-2-one, 3-(3H-imidazo[4,5-c]pyridin-2-yl)-6-methyl- 2H-1-Benzopyran-2-one, 3-(3H-imidazo[4,5-c]pyridin-2-yl)-6-methyl- 899548-78-8 C16H11N3O2
2-(3''-Chloro-[1,1':3',1''-terphenyl]-3-yl)-4,6-diphenyl-1,3,5-triazine 2-(3''-Chloro-[1,1':3',1''-terphenyl]-3-yl)-4,6-diphenyl-1,3,5-triazine 1955546-89-0 C33H22ClN3
N-(4-(1H-imidazol-1-yl)phenyl)-4-(1H-imidazol-1-yl)-N-phenylaniline N-(4-(1H-imidazol-1-yl)phenyl)-4-(1H-imidazol-1-yl)-N-phenylaniline 1863055-77-9 C24H19N5
2-ethyl-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1,3-benzodiazole 2-ethyl-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1,3-benzodiazole 2415827-15-3 C21H25BN2O2
5-Methyl-3-isoxazolecarbonitrile 5-Methyl-3-isoxazolecarbonitrile 57351-99-2 C5H4N2O
4,7-Dibromo-5,6-difluoro-2-(2-octyldodecyl)-2H-benzo[d][1,2,3]triazole 4,7-Dibromo-5,6-difluoro-2-(2-octyldodecyl)-2H-benzo[d][1,2,3]triazole
pyridine-2-carbaldehyde-2-pyridylhydrazone pyridine-2-carbaldehyde-2-pyridylhydrazone 2215-33-0 C11H10N4
2-[1-(but-2-enyl)pent-3-enyl]pyridine 2-[1-(but-2-enyl)pent-3-enyl]pyridine 2057-42-3 C14H19N
2,4,6-tris(4-azidophenyl)pyridine 2,4,6-tris(4-azidophenyl)pyridine 1240044-76-1
6-amino-5-formamido-1,3-dimethyluracil 6-amino-5-formamido-1,3-dimethyluracil 7597-60-6 C7H10N4O3
Dipentaerythritol hexaacrylate Dipentaerythritol hexaacrylate 29570-58-9 C28H34O13
N-(4-PHENOXYPHENYL)PICOLINAMIDE N-(4-PHENOXYPHENYL)PICOLINAMIDE 255904-96-2 C18H14N2O2
4-METHOXY-1H-PYRAZOLO[3,4-D]PYRIMIDIN-6-AMINE 4-METHOXY-1H-PYRAZOLO[3,4-D]PYRIMIDIN-6-AMINE 100644-67-5 C6H7N5O
6-Methoxynicotinamide 6-Methoxynicotinamide 7150-23-4 C7H8N2O2
(S)-pyrrolidine-3-carboxylic acid hydrochloride (S)-pyrrolidine-3-carboxylic acid hydrochloride 1124369-40-9 C5H10ClNO2
4-Chloro-6-iodo-7-phenylsulfonyl-7H-pyrrolo[2,3-d]pyrimidine 4-Chloro-6-iodo-7-phenylsulfonyl-7H-pyrrolo[2,3-d]pyrimidine 876343-09-8 C12H7ClIN3O2S
2-ISOPROPYL PYRIDINE 2-ISOPROPYL PYRIDINE 644-98-4 C8H11N
7-Bromo-2-methylbenzo[d]oxazole 7-Bromo-2-methylbenzo[d]oxazole 1239489-82-7 C8H6BrNO
2-Trifluoromethylimidazole-4-carboxylic acid 2-Trifluoromethylimidazole-4-carboxylic acid 78016-98-5 C5H3F3N2O2
3,6-Bis(3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazine 3,6-Bis(3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazine 30169-25-6 C12H14N8
3-Ethyl-3-[(2-ethylhexyloxy)methyl]oxetane 3-Ethyl-3-[(2-ethylhexyloxy)methyl]oxetane 298695-60-0 C14H28O2
2-Oxo-1-(4-piperidinyl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine dihydrochloride 2-Oxo-1-(4-piperidinyl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine dihydrochloride 781649-84-1 C11H15ClN4O
6-Nitroimidazo[1,2-a]pyridine-2-carboxylic acid 6-Nitroimidazo[1,2-a]pyridine-2-carboxylic acid 904805-51-2 C8H5N3O4
Methyl 4-chloro-7-Methoxyquinoline-6-carboxylate Methyl 4-chloro-7-Methoxyquinoline-6-carboxylate 205448-66-4 C12H10ClNO3
5-hydroxy-pyrazole 5-hydroxy-pyrazole 60456-92-0 C3H4N2O
2,4-Dichloro-6-methylthieno[2,3-d]pyrimidine 2,4-Dichloro-6-methylthieno[2,3-d]pyrimidine 76872-23-6 C7H4Cl2N2S
4-broMo-2-(2-Methoxyethoxy)pyridine 4-broMo-2-(2-Methoxyethoxy)pyridine 1289131-55-0 C8H10BrNO2
1-tert-Butyl 2-methyl 2-methylpyrrolidine-1,2-dicarboxylate 1-tert-Butyl 2-methyl 2-methylpyrrolidine-1,2-dicarboxylate 317355-80-9 C12H21NO4
1H-Pyrazole-1-propanenitrile, β-cyclopentyl-4-[7-[[2-(triMethylsilyl)ethoxy]Methyl]-7H-pyrrolo[2,3-d]pyriMidin-4-yl]-, (βR)- 1H-Pyrazole-1-propanenitrile, β-cyclopentyl-4-[7-[[2-(triMethylsilyl)ethoxy]Methyl]-7H-pyrrolo[2,3-d]pyriMidin-4-yl]-, (βR)- 941685-40-1 C23H32N6OSi
2,4-DICHLORO-5-FLUORO-7H-PYRROLO[2,3-D]PYRIMIDINE 2,4-DICHLORO-5-FLUORO-7H-PYRROLO[2,3-D]PYRIMIDINE 1053228-29-7 C6H2Cl2FN3
3-BroMo-pyrrolidine hydrochloride 3-BroMo-pyrrolidine hydrochloride 952748-39-9 C4H9BrClN
5-Chloro-3-nitropyrazolo[1,5-a]pyriMidine 5-Chloro-3-nitropyrazolo[1,5-a]pyriMidine 1363380-51-1 C6H3ClN4O2
L-4,5,6,7-TETRAHYDRO-1H-IMIDAZO[4,5-C]PYRIDINE-6-CARBOXYLIC ACID L-4,5,6,7-TETRAHYDRO-1H-IMIDAZO[4,5-C]PYRIDINE-6-CARBOXYLIC ACID 59981-63-4 C7H9N3O2
5-bromo-4-fluoro-1H-indazole 5-bromo-4-fluoro-1H-indazole 1082041-85-7 C7H4BrFN2
Ethyl 7H-pyrrolo[2,3-d]pyriMidine-4-carboxylate Ethyl 7H-pyrrolo[2,3-d]pyriMidine-4-carboxylate 915142-91-5 C9H9N3O2
5-benzyl-4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridine 5-benzyl-4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridine 35005-72-2 C13H14N2O
3-diMethylpyrrolidine-3-carboxylic acid 3-diMethylpyrrolidine-3-carboxylic acid 912771-28-9 C7H13NO2
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
电白县| 和平区| 曲周县| 井陉县| 东阿县| 天峻县| 封丘县| 峡江县| 龙陵县| 塘沽区| 阿克苏市| 梁山县| 丘北县| 布尔津县| 汕头市| 阿合奇县| 保山市| 普兰县| 隆尧县| 阿城市| 锡林郭勒盟| 汶上县| 昌吉市| 安西县| 香格里拉县| 疏勒县| 额敏县| 双城市| 大新县| 六安市| 三河市| 峡江县| 醴陵市| 萍乡市| 邢台市| 洛阳市| 辽宁省| 庆城县| 怀柔区| 双峰县| 苏尼特右旗|