Product Name

  • Name

    Enalapril

  • EINECS
  • CAS No. 75847-73-3
  • Article Data16
  • CAS DataBase
  • Density 1.204 g/cm3
  • Solubility Soluble in water at 25mg/ml
  • Melting Point 143-144.5oC
  • Formula C20H28N2O5
  • Boiling Point 582.4 °C at 760 mmHg
  • Molecular Weight 376.453
  • Flash Point 306 °C
  • Transport Information
  • Appearance
  • Safety 22-24/25
  • Risk Codes
  • Molecular Structure Molecular Structure of 75847-73-3 (Enalapril)
  • Hazard Symbols
  • Synonyms L-Proline,1-[N-[1-(ethoxycarbonyl)-3-phenylpropyl]-L-alanyl]-, (S)-;
  • PSA 95.94000
  • LogP 1.93340

Synthetic route

N-succinimidyl (2S)-2-{N-[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino}propionate
89371-34-6

N-succinimidyl (2S)-2-{N-[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino}propionate

L-proline
147-85-3

L-proline

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With triethylamine In ethanol; water for 16h; Ambient temperature;92.9%
N--L-alanyl>-L-proline tert butyl ester
108428-39-3

N--L-alanyl>-L-proline tert butyl ester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With trifluoroacetic acid for 3h; Ambient temperature;85%
With hydrogenchloride In ethyl acetate
2-oxo-4-phenylbutanoic acid ethyl ester
64920-29-2

2-oxo-4-phenylbutanoic acid ethyl ester

L-alanyl-L-proline
13485-59-1

L-alanyl-L-proline

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With hydrogen In ethanol at 45℃; under 735.074 - 772.577 Torr; Catalytic behavior; Kinetics; Solvent; Reagent/catalyst;70%
L-alanyl-L-proline
13485-59-1

L-alanyl-L-proline

(E)-ethyl-2-oxo-4-phenylbut-3-enoate
17451-20-6, 55674-14-1, 55629-96-4

(E)-ethyl-2-oxo-4-phenylbut-3-enoate

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With 4 A molecular sieve; hydrogen; triethylamine; palladium In ethanol at 20℃; for 44h;65%
2-oxo-4-phenylbutanoic acid ethyl ester
64920-29-2

2-oxo-4-phenylbutanoic acid ethyl ester

L-alanyl-L-proline
13485-59-1

L-alanyl-L-proline

A

enalapril
75847-73-3

enalapril

B

enalapril
76420-74-1

enalapril

Conditions
ConditionsYield
nickel Product distribution; var. catalysts and reducing agents, diastereomeric ratio;
With 3 A molecular sieve; hydrogen; nickel In ethanol at 23 - 28℃; under 2068.6 Torr; for 18h; Title compound not separated from byproducts;
With potassium fluoride; 3 A molecular sieve; hydrogen; acetic acid; nickel In ethanol at 22℃; under 760 Torr; for 18h; Yield given; Yields of byproduct given;
N-<(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl>-L-alanyl-L-proline Benzylester
120924-94-9

N-<(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl>-L-alanyl-L-proline Benzylester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal In ethanol under 735.5 Torr; for 2h; Ambient temperature; Yield given;
With palladium 10% on activated carbon; hydrogen In methanol at 15 - 20℃;
L-proline
147-85-3

L-proline

C18H26N2O4
406213-94-3

C18H26N2O4

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With 1,8-diazabicyclo[5.4.0]undec-7-ene In dichloromethane; acetonitrile at 20℃; for 8h;
[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine
82717-96-2

[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: HCl / CH2Cl2; dioxane / -5 - 0 °C
1.2: ClCOCOCl / dimethylformamide; CH2Cl2; dioxane / -5 - 0 °C
2.1: dimethylformamide; CH2Cl2; dioxane / 1 h / 20 °C
3.1: DBU / acetonitrile; CH2Cl2 / 8 h / 20 °C
View Scheme
Multi-step reaction with 2 steps
1: 86 percent / NaHCO3, diphenylchlorophosphate / acetone / 1 h / 50 °C
2: 92.9 percent / Et3N / ethanol; H2O / 16 h / Ambient temperature
View Scheme
N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine acid chloride
103377-40-8

N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine acid chloride

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: dimethylformamide; CH2Cl2; dioxane / 1 h / 20 °C
2: DBU / acetonitrile; CH2Cl2 / 8 h / 20 °C
View Scheme
3-phenyl-propionaldehyde
104-53-0

3-phenyl-propionaldehyde

sodium-

sodium-

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 45 percent / methanol; H2O / 8 h / 70 °C
2: 99.3 percent / NH4Cl / aq. NH3 / 50 h / 37 °C / enzymatic hydrolysis with Pseudomonas putida at pH 9
3: 1.) NaNO2, 2N H2SO4; 2.) KBr, NaNO2, 3N H2SO4 / 1.) 50percent CH3COOH, r.t., 24 h; 2.) 50percent CH3COOH, 0-5 deg C, 1 h
4: 95 percent / SOCl2 / 24 h / Ambient temperature
5: 74 percent / (NH4)2CO3 / nitromethane; H2O / 96 h / 50 °C
6: 85 percent / TFA / 3 h / Ambient temperature
View Scheme
5-phenylethyl-imidazolidine-2,4-dione
120379-81-9

5-phenylethyl-imidazolidine-2,4-dione

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: 99.3 percent / NH4Cl / aq. NH3 / 50 h / 37 °C / enzymatic hydrolysis with Pseudomonas putida at pH 9
2: 1.) NaNO2, 2N H2SO4; 2.) KBr, NaNO2, 3N H2SO4 / 1.) 50percent CH3COOH, r.t., 24 h; 2.) 50percent CH3COOH, 0-5 deg C, 1 h
3: 95 percent / SOCl2 / 24 h / Ambient temperature
4: 74 percent / (NH4)2CO3 / nitromethane; H2O / 96 h / 50 °C
5: 85 percent / TFA / 3 h / Ambient temperature
View Scheme
(R)-2-bromo-4-phenylbutyric acid
121842-76-0

(R)-2-bromo-4-phenylbutyric acid

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 95 percent / SOCl2 / 24 h / Ambient temperature
2: 74 percent / (NH4)2CO3 / nitromethane; H2O / 96 h / 50 °C
3: 85 percent / TFA / 3 h / Ambient temperature
View Scheme
(R)-ethyl 2-bromo-4-phenylbutyrate
121842-77-1

(R)-ethyl 2-bromo-4-phenylbutyrate

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 74 percent / (NH4)2CO3 / nitromethane; H2O / 96 h / 50 °C
2: 85 percent / TFA / 3 h / Ambient temperature
View Scheme
N-carbamyl (R)-2-amino-4-phenylbutyric acid
121842-75-9

N-carbamyl (R)-2-amino-4-phenylbutyric acid

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 1.) NaNO2, 2N H2SO4; 2.) KBr, NaNO2, 3N H2SO4 / 1.) 50percent CH3COOH, r.t., 24 h; 2.) 50percent CH3COOH, 0-5 deg C, 1 h
2: 95 percent / SOCl2 / 24 h / Ambient temperature
3: 74 percent / (NH4)2CO3 / nitromethane; H2O / 96 h / 50 °C
4: 85 percent / TFA / 3 h / Ambient temperature
View Scheme
2-oxo-4-phenylbutanoic acid ethyl ester
64920-29-2

2-oxo-4-phenylbutanoic acid ethyl ester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 29 percent / H2, AcONa, AcOH, molecular sieves 3A / Raney Ni / ethanol
2: 93 percent / HCl / H2O / 4 h
3: 67 percent / diethyl phosphorocyanidate, Et3N / dimethylformamide / 1 h
4: HCl / ethyl acetate
View Scheme
proline tert-butyl ester
2812-46-6

proline tert-butyl ester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 67 percent / diethyl phosphorocyanidate, Et3N / dimethylformamide / 1 h
2: HCl / ethyl acetate
View Scheme
N-<(S)-1-(ethoxycarbonyl)-3-phenylpropyl>-L-alanine tert-butylester
80828-38-2

N-<(S)-1-(ethoxycarbonyl)-3-phenylpropyl>-L-alanine tert-butylester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 93 percent / HCl / H2O / 4 h
2: 67 percent / diethyl phosphorocyanidate, Et3N / dimethylformamide / 1 h
3: HCl / ethyl acetate
View Scheme
N-[1-(S)-(ethoxycarbonyl)-3-phenylpropyl]-L-alanine hydrochloride
80828-26-8

N-[1-(S)-(ethoxycarbonyl)-3-phenylpropyl]-L-alanine hydrochloride

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 67 percent / diethyl phosphorocyanidate, Et3N / dimethylformamide / 1 h
2: HCl / ethyl acetate
View Scheme
Multi-step reaction with 2 steps
1.1: (chloromethylene)dimethyliminium chloride / dichloromethane / 0.67 h / -10 - -5 °C / Inert atmosphere
1.2: Inert atmosphere
2.1: hydrogen; palladium 10% on activated carbon / methanol / 15 - 20 °C
View Scheme
N-<(2R)-2-(4-Toluenesulfonyloxy)propionyl>-L-proline Benzylester
136622-17-8

N-<(2R)-2-(4-Toluenesulfonyloxy)propionyl>-L-proline Benzylester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 76 percent / Et3N / dimethylsulfoxide / 8 h / 75 °C
2: hydrogen / 10percent Pd/C / ethanol / 2 h / 735.5 Torr / Ambient temperature
View Scheme
N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride
84793-24-8

N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride

L-proline
147-85-3

L-proline

A

[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine
82717-96-2

[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine

B

enalaprilate
76420-72-9

enalaprilate

C

enalapril
75847-73-3

enalapril

D

(S)-2-((3S,8aS)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid ethyl ester
115729-52-7

(S)-2-((3S,8aS)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid ethyl ester

Conditions
ConditionsYield
Stage #1: N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride; L-proline In water; ethyl acetate at 19 - 20℃; for 5h; pH=10 - 11;
Stage #2: at 30℃; for 0.166667h; pH=4.3 - 4.7;
A 0.5 %Chromat.
B 0.4 %Chromat.
C 14 %Chromat.
D 0.5 %Chromat.
Stage #1: N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride; L-proline In dichloromethane; water at 19 - 20℃; for 5h; pH=9.5 - 11.5;
Stage #2: at 30℃; for 0.166667h; pH=4.3 - 4.7;
A 0.5 %Chromat.
B 0.5 %Chromat.
C 10 %Chromat.
D 0.6 %Chromat.
Stage #1: N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride; L-proline In water; ethyl acetate at 19 - 20℃; for 5h; pH=9.5 - 11.5;
Stage #2: at 30℃; for 0.166667h; pH=4.3 - 4.7;
A 0.6 %Chromat.
B 0.5 %Chromat.
C 14 %Chromat.
D 0.4 %Chromat.
[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine
82717-96-2

[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine

L-proline
147-85-3

L-proline

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; triethylamine In DMF (N,N-dimethyl-formamide); acetonitrile at 20℃; for 0.5h;
aqueous pyridine

aqueous pyridine

L-alanyl-D-proline TFA salt

L-alanyl-D-proline TFA salt

2-oxo-4-phenylbutanoic acid ethyl ester
64920-29-2

2-oxo-4-phenylbutanoic acid ethyl ester

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With sodium cyanoborohydride; triethylamine In ethanol; water
2-oxo-4-phenylbutanoic acid ethyl ester
64920-29-2

2-oxo-4-phenylbutanoic acid ethyl ester

L-alanyl-L-proline
13485-59-1

L-alanyl-L-proline

A

nitric salt

nitric salt

B

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
aluminum nickel; silica gel In ethanol; acetic acid methyl ester; water; ethyl acetate
benzyl (2S)-2-pyrrolidinecarboxylate hydrochloride
16652-71-4

benzyl (2S)-2-pyrrolidinecarboxylate hydrochloride

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: (chloromethylene)dimethyliminium chloride / dichloromethane / 0.67 h / -10 - -5 °C / Inert atmosphere
1.2: Inert atmosphere
2.1: hydrogen; palladium 10% on activated carbon / methanol / 15 - 20 °C
View Scheme
C20H26N2O6

C20H26N2O6

enalapril
75847-73-3

enalapril

Conditions
ConditionsYield
With sulfuric acid; palladium on activated charcoal; hydrogen for 1h; Large scale;
enalapril
75847-73-3

enalapril

enalapril sodium salt
149404-21-7

enalapril sodium salt

Conditions
ConditionsYield
With sodium methylate In methanol100%
enalapril
75847-73-3

enalapril

maleic acid
110-16-7

maleic acid

Amprace
76095-16-4

Amprace

Conditions
ConditionsYield
at 5 - 30℃; for 7h;92%
at 30 - 50℃; for 6h;90%
In water at 5 - 60℃; for 4h;90%
enalapril
75847-73-3

enalapril

enalaprilate
76420-72-9

enalaprilate

Conditions
ConditionsYield
With sodium hydroxide for 24h; Ambient temperature;75%
at 37℃; esterase from various rat tissue homogenates or plasma;
With recombinant human carboxylesterase 1; water In aq. phosphate buffer at 37℃; for 0.333333h; Kinetics; Enzymatic reaction;
enalapril
75847-73-3

enalapril

(S)-2-((3S,8aS)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid ethyl ester
115729-52-7

(S)-2-((3S,8aS)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid ethyl ester

Conditions
ConditionsYield
In xylene for 5h; Heating;60%
enalapril
75847-73-3

enalapril

(R)-2-((3S,8aR)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid

(R)-2-((3S,8aR)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 60 percent / xylene / 5 h / Heating
2: tetramethylammonium hydroxide / ethanol / 2 h
View Scheme
enalapril
75847-73-3

enalapril

(S)-2-((3S,8aR)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid

(S)-2-((3S,8aR)-3-Methyl-1,4-dioxo-hexahydro-pyrrolo[1,2-a]pyrazin-2-yl)-4-phenyl-butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 60 percent / xylene / 5 h / Heating
2: tetramethylammonium hydroxide / ethanol / 2 h
View Scheme
enalapril
75847-73-3

enalapril

enalaprilic acid

enalaprilic acid

Conditions
ConditionsYield
In sodium hydroxide
In sodium hydroxide

Enalapril Chemical Properties

 
IUPAC Name:  (2S)-1-[(2S)-2-[[(2S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl]amino]propanoyl]pyrrolidine-2-carboxylic acid 
Molecular Formula: C20H28N2O5
Molecular Weight: 376.45 g/mol
Product Categories: Angiotensin
Classification Code: Angiotensin-converting enzyme inhibitors; Antihypertensive agents; Cardiovascular Agents; Enzyme Inhibitors; Protease Inhibitors
Index of Refraction: 1.549 
Molar Refractivity: 99.53 cm3 
Molar Volume: 312.5 cm3  
Surface Tension: 51.2 dyne/cm 
Density: 1.204 g/cm3 
Flash Point: 306 °C 
Enthalpy of Vaporization: 91.58 kJ/mol 
Boiling Point: 582.4 °C at 760 mmHg 
Vapour Pressure of Enalapril (CAS NO.75847-73-3): 2.1E-14 mmHg at 25 °C

Enalapril Uses

  Enalapril (CAS NO.75847-73-3) is an angiotensin converting enzyme (ACE) inhibitor used in the treatment of hypertension and some types of chronic heart failure.

Enalapril Safety Profile

Safety Statements of Enalapril (CAS NO.75847-73-3): 22-24/25 
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes.

Enalapril Specification

  Enalapril (CAS NO.75847-73-3), its Synonyms are (S)-1-(N-(1-(Ethoxycarbonyl)-3-phenylpropyl)-L-alanyl)-L-proline ; 1-(N-((S)-1-Carboxy-3-phenylpropyl)-L-alanyl)-L-proline 1'-ethyl ester ; Bonuten ; Enalapril Richet ; Enalaprila ; L-Proline, 1-(N-(1-(ethoxycarbonyl)-3-phenylpropyl)-L-alanyl)-, (S)- ; L-Proline, N-((1S)-1-(ethoxycarbonyl)-3-phenylpropyl)-L-alanyl- .

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