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14597-58-1

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14597-58-1 Usage

General Description

5-Amino-thiophene-2-carboxylic acid methyl ester is a chemical compound with the molecular formula C6H7NO2S. It is a methyl ester of 5-amino-thiophene-2-carboxylic acid, containing a thiophene ring and an amino group. 5-Amino-thiophene-2-carboxylic acid methyl ester is used as a building block in the synthesis of pharmaceuticals and agrochemicals. It is also used as an intermediate in the production of dyes and pigments. Additionally, it has been studied for its potential biological activities, including antimicrobial and anti-inflammatory properties. This chemical compound is commonly used in research laboratories and industrial settings for its versatile applications in organic synthesis and chemical reactions.

Check Digit Verification of cas no

The CAS Registry Mumber 14597-58-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,5,9 and 7 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 14597-58:
(7*1)+(6*4)+(5*5)+(4*9)+(3*7)+(2*5)+(1*8)=131
131 % 10 = 1
So 14597-58-1 is a valid CAS Registry Number.
InChI:InChI=1/C6H7NO2S/c1-9-6(8)4-2-3-5(7)10-4/h2-3H,7H2,1H3

14597-58-1Synthetic route

methyl 5-nitrothiophene-2-carboxylate
5832-01-9

methyl 5-nitrothiophene-2-carboxylate

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

Conditions
ConditionsYield
With palladium 10% on activated carbon; hydrogen In ethyl acetate at 20℃; for 2h;100%
With hydrogen; palladium 10% on activated carbon In ethanol under 760.051 Torr;92%
Stage #1: methyl 5-nitrothiophene-2-carboxylate With hydrogenchloride; tin(ll) chloride In ethanol; water at 20 - 35℃; for 2h;
Stage #2: In water pH=9; basic conditions;
66%
methanol
67-56-1

methanol

2-thiophenylcarboxylic acid
527-72-0

2-thiophenylcarboxylic acid

A

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

B

methyl 4-aminothiophene-2-carboxylate
89499-43-4

methyl 4-aminothiophene-2-carboxylate

Conditions
ConditionsYield
Stage #1: 2-thiophenylcarboxylic acid With sulfuric acid; nitric acid at 0 - 10℃; for 1.25h;
Stage #2: methanol With thionyl chloride at 20℃; Reflux;
A 8.5%
B 31%
5-nitrothiophene-2-carboxylic acid
6317-37-9

5-nitrothiophene-2-carboxylic acid

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: SOCl2
2: Fe; AcOH
View Scheme
Multi-step reaction with 3 steps
1: thionyl chloride / 1,2-dichloro-ethane / 0.5 h / 150 °C / Microwave irradiation
2: dichloromethane / 0 - 20 °C
3: 20 % Pd(OH)2/C; hydrogen / ethanol
View Scheme
Multi-step reaction with 2 steps
1: methanol / Reflux
2: ammonium formate; zinc / ethanol; ethyl acetate
View Scheme
methyl 5-nitrothiophene-2-carboxylate
5832-01-9

methyl 5-nitrothiophene-2-carboxylate

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

Conditions
ConditionsYield
In methanol; water
2-thiophenylcarboxylic acid
527-72-0

2-thiophenylcarboxylic acid

A

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

B

methyl 4-aminothiophene-2-carboxylate
89499-43-4

methyl 4-aminothiophene-2-carboxylate

Conditions
ConditionsYield
Stage #1: 2-thiophenylcarboxylic acid With sulfuric acid; nitric acid at 0 - 10℃;
Stage #2: With methanol; thionyl chloride at 20℃; Reflux;
Stage #3: With hydrogenchloride; iron; ammonium chloride In methanol; water at 20 - 70℃;
5-nitrothiophene-2-carbonyl chloride
39978-57-9

5-nitrothiophene-2-carbonyl chloride

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: dichloromethane / 0 - 20 °C
2: 20 % Pd(OH)2/C; hydrogen / ethanol
View Scheme
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidine-5-carbaldehyde
4869-46-9

1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidine-5-carbaldehyde

C13H13N3O4S
1177471-31-6

C13H13N3O4S

Conditions
ConditionsYield
With acetic acid for 6h; Reflux;94%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

C17H25N5O3SSi
1094070-49-1

C17H25N5O3SSi

C22H28N6O3SSi
1094071-35-8

C22H28N6O3SSi

Conditions
ConditionsYield
Stage #1: methyl 5-aminothiophene-2-carboxylate; C17H25N5O3SSi With sodium hydride In dimethyl sulfoxide at 20℃; for 0.166667h;
Stage #2: With water; ammonium chloride In dimethyl sulfoxide
85%
With sodium hydride In N,N-dimethyl-formamide at 20℃;
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

ethyl 4,4,4-trifluoroacetoacetate
372-31-6

ethyl 4,4,4-trifluoroacetoacetate

2-carbomethoxy-4-trifluoromethylthieno[2,3-b]pyridin-6-one
380419-63-6

2-carbomethoxy-4-trifluoromethylthieno[2,3-b]pyridin-6-one

Conditions
ConditionsYield
In acetic acid Heating;84%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

1,1,1-trifluoro-4-(2-thienyl)butane-2,4-dione
326-91-0

1,1,1-trifluoro-4-(2-thienyl)butane-2,4-dione

6-thiophen-2-yl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

6-thiophen-2-yl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

Conditions
ConditionsYield
In acetic acid Heating;78%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

N-(1-chloro-2,2,2-trifluoroethylidene)-O-methylurethane
126855-73-0

N-(1-chloro-2,2,2-trifluoroethylidene)-O-methylurethane

5-{2,2,2-Trifluoro-1-[(Z)-methoxycarbonylimino]-ethylamino}-thiophene-2-carboxylic acid methyl ester

5-{2,2,2-Trifluoro-1-[(Z)-methoxycarbonylimino]-ethylamino}-thiophene-2-carboxylic acid methyl ester

Conditions
ConditionsYield
With triethylamine In benzene at 20℃; for 2h;78%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

3,3-dimethoxy-2-formyl-propanenitrile sodium salt
105161-33-9

3,3-dimethoxy-2-formyl-propanenitrile sodium salt

methyl 5-cyanothieno[2,3-b]pyridine-2-carboxylate

methyl 5-cyanothieno[2,3-b]pyridine-2-carboxylate

Conditions
ConditionsYield
Stage #1: methyl 5-aminothiophene-2-carboxylate; 3,3-dimethyloxy-2-formylpropionitrile sodium salt With hydrogenchloride In methanol; water at 20℃; for 4h;
Stage #2: With hydrogenchloride In methanol; water at 20℃; for 12h;
78%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

C9H8BrF2NO2

C9H8BrF2NO2

methyl 5-(3-(difluoromethoxy)-2-nitrophenylamino)thiophene-2-carboxylate
1314091-77-4

methyl 5-(3-(difluoromethoxy)-2-nitrophenylamino)thiophene-2-carboxylate

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); caesium carbonate; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene In 1,4-dioxane at 80 - 90℃; for 0.25h; Inert atmosphere;77.5%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

3-fluoro-2-nitrobenzonitrile
1000339-52-5

3-fluoro-2-nitrobenzonitrile

methyl 5-(3-cyano-2-nitrophenylamino)thiophene-2-carboxylate
1314092-14-2

methyl 5-(3-cyano-2-nitrophenylamino)thiophene-2-carboxylate

Conditions
ConditionsYield
With triethylbutylammonium chloride; potassium hydroxide In N,N-dimethyl-formamide Cooling with ice;77%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

1-Phenyl-4,4,4-trifluorobutane-1,3-dione
326-06-7

1-Phenyl-4,4,4-trifluorobutane-1,3-dione

6-phenyl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

6-phenyl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

Conditions
ConditionsYield
In acetic acid Heating;73%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

methyl N-(1,2,2,2-tetrachloroethylidene)urethan
111335-09-2

methyl N-(1,2,2,2-tetrachloroethylidene)urethan

5-{2,2,2-Trichloro-1-[(Z)-methoxycarbonylimino]-ethylamino}-thiophene-2-carboxylic acid methyl ester

5-{2,2,2-Trichloro-1-[(Z)-methoxycarbonylimino]-ethylamino}-thiophene-2-carboxylic acid methyl ester

Conditions
ConditionsYield
With triethylamine In benzene at 20℃; for 2h;73%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

di-tert-butyl dicarbonate
24424-99-5

di-tert-butyl dicarbonate

methyl 5-((tert-butoxycarbonyl)amino)thiophene-2-carboxylate
666853-39-0

methyl 5-((tert-butoxycarbonyl)amino)thiophene-2-carboxylate

Conditions
ConditionsYield
In tetrahydrofuran for 48h; Reflux;68%
In tetrahydrofuran for 72h; Heating / reflux;
at 110℃; for 1.5h; Inert atmosphere;
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

2-(2-tert-butylphenoxy)-3-isocyanatopyridine
870072-76-7

2-(2-tert-butylphenoxy)-3-isocyanatopyridine

methyl 5-(3-(2-(2-(tert-butyl)phenoxy)pyridin-3-yl)ureido)thiophene-2-carboxylate

methyl 5-(3-(2-(2-(tert-butyl)phenoxy)pyridin-3-yl)ureido)thiophene-2-carboxylate

Conditions
ConditionsYield
In toluene at 80℃; for 1.5h; Microwave irradiation;63%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

N-(2-bromo-6-methylphenyl)acetamide
116436-11-4

N-(2-bromo-6-methylphenyl)acetamide

methyl 5-(2,4-dimethyl-1H-benzo[d]imidazol-1-yl)thiophene-2-carboxylate

methyl 5-(2,4-dimethyl-1H-benzo[d]imidazol-1-yl)thiophene-2-carboxylate

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate monohydrate; bis(2',6'-diisopropoxybiphenyl)cyclohexylphosphine In tert-butyl alcohol at 120℃; for 2h; Molecular sieve; Microwave irradiation;61%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

1,3-bis(tert-butoxycarbonyl)-2-methyl-2-thiopseudourea
322474-21-5, 107819-90-9

1,3-bis(tert-butoxycarbonyl)-2-methyl-2-thiopseudourea

methyl 5-{[(1E)-{[(tert-butoxy)carbonyl]amino}({[(tert-butoxy)carbonyl]imino}) methyl]amino}thiophene-2-carboxylate

methyl 5-{[(1E)-{[(tert-butoxy)carbonyl]amino}({[(tert-butoxy)carbonyl]imino}) methyl]amino}thiophene-2-carboxylate

Conditions
ConditionsYield
With triethylamine; mercury dichloride In N,N-dimethyl-formamide at 20℃;53%
With triethylamine; mercury dichloride In N,N-dimethyl-formamide at 20℃;
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

(N-methyl)benzimidoyl chloride
41890-17-9

(N-methyl)benzimidoyl chloride

2-methoxycarbonyl-5-(α-methylaminobenzylidene)aminothiophene
380416-72-8

2-methoxycarbonyl-5-(α-methylaminobenzylidene)aminothiophene

Conditions
ConditionsYield
With triethylamine In benzene at 25℃; for 12h;47%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

2-dimethylaminomethylene-1,3-bis(dimethylimonio)propane diperchlorate
2009-81-6

2-dimethylaminomethylene-1,3-bis(dimethylimonio)propane diperchlorate

methyl 5-formylthieno[2,3-b]pyridine-2-carboxylate

methyl 5-formylthieno[2,3-b]pyridine-2-carboxylate

Conditions
ConditionsYield
With sodium methylate In methanol for 12h; Reflux;43%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

tert-butyl N-[(tert-butoxy)carbonyl]-N-(6-chloro-4-methylpyridazin-3-yl)carbamate

tert-butyl N-[(tert-butoxy)carbonyl]-N-(6-chloro-4-methylpyridazin-3-yl)carbamate

methyl 5-[(6-{bis[(tert-butoxy)carbonyl]amino}-5-methylpyridazin-3-yl)amino]thiophene-2-carboxylate

methyl 5-[(6-{bis[(tert-butoxy)carbonyl]amino}-5-methylpyridazin-3-yl)amino]thiophene-2-carboxylate

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); N-ethyl-N,N-diisopropylamine; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene at 100℃; Inert atmosphere;41%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

1-[(tert-butoxy)carbonyl]-4-[(dimethylamino)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(dimethylamino)methyl]piperidine-4-carboxylic acid

tert-butyl 4-[(dimethylamino)methyl]-4-{[5-(methoxycarbonyl)thiophen-2-yl]carbamoyl}piperidine-1-carboxylate

tert-butyl 4-[(dimethylamino)methyl]-4-{[5-(methoxycarbonyl)thiophen-2-yl]carbamoyl}piperidine-1-carboxylate

Conditions
ConditionsYield
Stage #1: 1-[(tert-butoxy)carbonyl]-4-[(dimethylamino)methyl]piperidine-4-carboxylic acid With N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: methyl 5-aminothiophene-2-carboxylate In N,N-dimethyl-formamide at 30℃; for 18h;
39%
2-amino-4,5,6,7,8,9-hexahydro-cycloocta[b]thiophene-3-carboxylic acid isopropyl ester
910472-18-3

2-amino-4,5,6,7,8,9-hexahydro-cycloocta[b]thiophene-3-carboxylic acid isopropyl ester

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

bis(trichloromethyl) carbonate
32315-10-9

bis(trichloromethyl) carbonate

2-[3-(3-methoxycarbonyl-thiophen-2-yl)-ureido]-4,5,6,7,8,9-hexahydro-cycloocta[b]thiophene-3-carboxylic acid isopropyl ester

2-[3-(3-methoxycarbonyl-thiophen-2-yl)-ureido]-4,5,6,7,8,9-hexahydro-cycloocta[b]thiophene-3-carboxylic acid isopropyl ester

Conditions
ConditionsYield
Stage #1: 2-amino-4,5,6,7,8,9-hexahydro-cycloocta[b]thiophene-3-carboxylic acid isopropyl ester; bis(trichloromethyl) carbonate With triethylamine In dichloromethane at 20℃; for 2h;
Stage #2: methyl 5-aminothiophene-2-carboxylate In dichloromethane at 20℃; for 1h;
27%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

racemic (2'R,3R,3'S,5'S)-6-chloro-3'-(3-chloro-2-fluoro-phenyl)-5'-(2-cyano-2-methyl-propyl)-2-oxo-spiro[indoline-3,4'-pyrrolidine]-2'-carboxylic acid

racemic (2'R,3R,3'S,5'S)-6-chloro-3'-(3-chloro-2-fluoro-phenyl)-5'-(2-cyano-2-methyl-propyl)-2-oxo-spiro[indoline-3,4'-pyrrolidine]-2'-carboxylic acid

methyl rac-5-[[(2'R,3R,3'S,5'S)-6-chloro-3'-(3-chloro-2-fluoro-phenyl)-5'-(2-cyano-2-methyl-propyl)-2-oxo-spiro[indoline-3,4'-pyrrolidine]-2'-carbonyl]amino]thiophene-2-carboxylate

methyl rac-5-[[(2'R,3R,3'S,5'S)-6-chloro-3'-(3-chloro-2-fluoro-phenyl)-5'-(2-cyano-2-methyl-propyl)-2-oxo-spiro[indoline-3,4'-pyrrolidine]-2'-carbonyl]amino]thiophene-2-carboxylate

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; HATU In N,N-dimethyl-formamide at 20℃;8.7%
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

5-benzoylimino-4,5-dihydro-thiophene-2-carboxylic acid methyl ester

5-benzoylimino-4,5-dihydro-thiophene-2-carboxylic acid methyl ester

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

benzyl isothiocyanate
3173-56-6

benzyl isothiocyanate

5-(3-benzyl-ureido)-thiophene-2-carboxylic acid methyl ester
304696-16-0

5-(3-benzyl-ureido)-thiophene-2-carboxylic acid methyl ester

methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

4-oxo-2-trichloromethyl-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid methyl ester

4-oxo-2-trichloromethyl-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid methyl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 73 percent / Et3N / benzene / 2 h / 20 °C
2: 79 percent / toluene / 3 h / 110 °C
View Scheme
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

4-oxo-2-trifluoromethyl-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid methyl ester

4-oxo-2-trifluoromethyl-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid methyl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 78 percent / Et3N / benzene / 2 h / 20 °C
2: 76 percent / toluene / 3 h / 110 °C
View Scheme
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

C10H5Cl2F3NO4PS

C10H5Cl2F3NO4PS

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 84 percent / acetic acid / Heating
2: POCl3 / 3 h / Heating
View Scheme
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

2-carbomethoxy-4-trifluoromethylthieno[2,3-b]pyridin-6-yl dimethylphosphate

2-carbomethoxy-4-trifluoromethylthieno[2,3-b]pyridin-6-yl dimethylphosphate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 84 percent / acetic acid / Heating
2: POCl3 / 3 h / Heating
3: Et3N / benzene / 1.5 h / 20 °C
View Scheme
methyl 5-aminothiophene-2-carboxylate
14597-58-1

methyl 5-aminothiophene-2-carboxylate

6-pyrrolidin-1-yl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

6-pyrrolidin-1-yl-4-trifluoromethyl-thieno[2,3-b]pyridine-2-carboxylic acid methyl ester

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 84 percent / acetic acid / Heating
2: 73 percent / Et3N / dioxane / 16 h / Heating
3: 75 percent / i-Pr2NEt / dioxane / Heating
View Scheme

14597-58-1Relevant articles and documents

Discovery of a novel series of guanidinebenzoates as gut-restricted enteropeptidase and trypsin dual inhibitors for the treatment of metabolic syndrome

Zhang, Xuqing,Zhu, Bin,Sun, Weimei,Wang, Mina,Albarazanji, Kamal,Ghosh, Brahma,Cummings, Maxwell,Lenhard, James,Leonard, James,Macielag, Mark,Lanter, James

, (2021)

A novel series of guanidinebenzoate enteropeptidase and trypsin dual inhibitors has been discovered and SAR studies were conducted. Optimization was focused on improving properties for gut restriction, including increased aqueous solubility, lower cellular permeability, and reduced oral bioavailability. Lead compounds were identified with efficacy in a mouse fecal protein excretion study.

Design, synthesis, and biological evaluation of 2-(phenoxyaryl)-3-urea derivatives as novel P2Y1 receptor antagonists

Peng, Jingjing,Zhao, Lifen,Wang, Lanlan,Chen, Hui,Qiu, Yunguang,Wang, Jiang,Yang, Huaiyu,Liu, Jun,Liu, Hong

, p. 302 - 310 (2018/09/18)

A novel series of 2-(phenoxyaryl)-3-urea derivatives were designed, synthesized, and biologically evaluated for their anti-thrombotic activity. Most of compounds exhibited good inhibition against P2Y1 receptor. Among them, three compounds 11, 12, and 13 demonstrated good P2Y1 receptor antagonistic potency in vitro (IC50 = 0.62 μM, 0.82 μM, and 0.21 μM, respectively). In antiplatelet aggregation study, four compounds 2, 3, 9, and 13 showed good antiplatelet activity. The possible binding modes of compounds with P2Y1 receptor were also explored by molecular docking simulation. The docking studies demonstrated that compound 13 interacted well with Phe119 through hydrophobic interaction and modestly improved the P2Y1 receptor antagonistic activity, making it justifiable for further investigation.

Optimization of potent inhibitors of P. falciparum dihydroorotate dehydrogenase for the treatment of malaria

Skerlj, Renato T.,Bastos, Cecilia M.,Booker, Michael L.,Kramer, Martin L.,Barker, Robert H.,Celatka, Cassandra A.,O'Shea, Thomas J.,Munoz, Benito,Sidhu, Amar Bir,Cortese, Joseph F.,Wittlin, Sergio,Papastogiannidis, Petros,Angulo-Barturen, Inigo,Jimenez-Diaz, Maria Belen,Sybertz, Edmund

supporting information; experimental part, p. 708 - 713 (2011/11/04)

Inhibition of dihydroorotate dehydrogenase (DHODH) for P. falciparum potentially represents a new treatment option for malaria, since DHODH catalyzes the rate-limiting step in the pyrimidine biosynthetic pathway and P. falciparum is unable to salvage pyrimidines and must rely on de novo biosynthesis for survival. We report herein the synthesis and structure-activity relationship of a series of 5-(2-methylbenzimidazol-1-yl)-N-alkylthiophene-2-carboxamides that are potent inhibitors against PfDHODH but do not inhibit the human enzyme. On the basis of efficacy observed in three mouse models of malaria, acceptable safety pharmacology risk assessment and safety toxicology profile in rodents, lack of potential drug-drug interactions, acceptable ADME/pharmacokinetic profile, and projected human dose, 5-(4-cyano-2-methyl-1H-benzo[d]imidazol-1-yl) -N-cyclopropylthiophene-2-carboxamide 2q was identified as a potential drug development candidate.

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