Product Name

  • Name

    Quinapril

  • EINECS 1312995-182-4
  • CAS No. 85441-61-8
  • Article Data6
  • CAS DataBase
  • Density 1.217 g/cm3
  • Solubility
  • Melting Point 120-130 °C
  • Formula C25H30N2O5
  • Boiling Point 662 °C at 760 mmHg
  • Molecular Weight 438.524
  • Flash Point 354.1 °C
  • Transport Information
  • Appearance white solid
  • Safety 22-24/25
  • Risk Codes
  • Molecular Structure Molecular Structure of 85441-61-8 (Quinapril)
  • Hazard Symbols
  • Synonyms 3-Isoquinolinecarboxylicacid,2-[2-[[1-(ethoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-1,2,3,4-tetrahydro-,[3S-[2[R*(R*)],3R*]]-;Ectren;Koretic;
  • PSA 95.94000
  • LogP 2.89590

Synthetic route

L-Tic-OH
74163-81-8

L-Tic-OH

N-(1-ethoxycarbonyl-3-phenylpropyl)-L-alanine
877932-98-4

N-(1-ethoxycarbonyl-3-phenylpropyl)-L-alanine

L-alanine acid chloride
129178-93-4

L-alanine acid chloride

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
With benzenesulfonamide; phosphorus pentachloride; triethylamine In n-heptane; dichloromethane; water83.9%
tert-butyl (S)-2-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate
82586-56-9

tert-butyl (S)-2-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
With trifluoroacetic acid for 1h; Ambient temperature;
quinapril hydrochloride
82586-55-8

quinapril hydrochloride

A

quinapril
85441-61-8

quinapril

B

<3S-<2(R*),3α,11aβ>>-1,3,4,6,11,11a-hexahydro-3-methyl-1,4-dioxo-α-(2-phenylethyl)-2H-pyrazino<1,2-b>isoquinoline-2-acetic acid, ethyl ester
103733-49-9

<3S-<2(R*),3α,11aβ>>-1,3,4,6,11,11a-hexahydro-3-methyl-1,4-dioxo-α-(2-phenylethyl)-2H-pyrazino<1,2-b>isoquinoline-2-acetic acid, ethyl ester

Conditions
ConditionsYield
With citric acid at 80℃; pH=2.60; Kinetics; Further Variations:; pH-values;
quinapril benzyl ester
82586-54-7

quinapril benzyl ester

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal
With hydrogenchloride; hydrogen; 5%-palladium/activated carbon In water; acetone at 35 - 40℃; under 367.786 Torr; for 5h; Product distribution / selectivity;
[1(S)-(ethoxycarbonyl)-3-phenylpropyl]-(S)-alanine
82717-96-2

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

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: triphenylphosphine / CH2Cl2 / 0.75 h
1.2: 45 percent / CH2Cl2 / 2.5 h / 25 - 30 °C
2.1: triethylamine / CH2Cl2 / 4 h / -15 - -10 °C
3.1: hydrogen / Pd/C
View Scheme
N-[1(S)-ethoxycarbonyl-3-phenylpropyl]-(S)-alanine-2'-benzothiazolylthio ester
124492-03-1

N-[1(S)-ethoxycarbonyl-3-phenylpropyl]-(S)-alanine-2'-benzothiazolylthio ester

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: triethylamine / CH2Cl2 / 4 h / -15 - -10 °C
2: hydrogen / Pd/C
View Scheme
L-Tic-OH
74163-81-8

L-Tic-OH

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: H2SO4 / dioxane / 17 h / Ambient temperature
2: 78 percent / Et3N, DCC, 1-hydroxybenzotriazole / tetrahydrofuran / Ambient temperature
3: TFA / 1 h / Ambient temperature
View Scheme
(S)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, 1,1-dimethylethyl ester
77497-74-6

(S)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, 1,1-dimethylethyl ester

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 78 percent / Et3N, DCC, 1-hydroxybenzotriazole / tetrahydrofuran / Ambient temperature
2: TFA / 1 h / Ambient temperature
View Scheme
N-[1-(S)-(ethoxycarbonyl)-3-phenylpropyl]-L-alanine hydrochloride
80828-26-8

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

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 78 percent / Et3N, DCC, 1-hydroxybenzotriazole / tetrahydrofuran / Ambient temperature
2: TFA / 1 h / Ambient temperature
View Scheme
C33H38N2O5

C33H38N2O5

quinapril
85441-61-8

quinapril

Conditions
ConditionsYield
With hydrogenchloride; hydrogen; 5%-palladium/activated carbon In ethanol; water at 35 - 40℃; under 367.786 Torr; for 5h; Product distribution / selectivity;
quinapril
85441-61-8

quinapril

<3S-<2(R*),3α,11aβ>>-1,3,4,6,11,11a-hexahydro-3-methyl-1,4-dioxo-α-(2-phenylethyl)-2H-pyrazino<1,2-b>isoquinoline-2-acetic acid, ethyl ester
103733-49-9

<3S-<2(R*),3α,11aβ>>-1,3,4,6,11,11a-hexahydro-3-methyl-1,4-dioxo-α-(2-phenylethyl)-2H-pyrazino<1,2-b>isoquinoline-2-acetic acid, ethyl ester

Conditions
ConditionsYield
With acetic acid In toluene at 95℃; for 0.5h;80%
quinapril
85441-61-8

quinapril

A

ethanol
64-17-5

ethanol

B

quinaprilate
82768-85-2

quinaprilate

Conditions
ConditionsYield
With Tris-HCl buffer; human liver carboxylesterase pI 4.5 at 37℃; pH=7.4; Enzyme kinetics; Further Variations:; Reagents; Hydrolysis;

Quinapril Specification

The IUPAC name of Quinapril is (3S)-2-[(2S)-2-[[(2S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl]amino]propanoyl]-3,4-dihydro-1H-isoquinoline-3-carboxylic acid. With the CAS registry number 85441-61-8, it is also named as 3-Isoquinolinecarboxylic acid, 2-(2-((1-(ethoxycarbonyl)-3-phenylpropyl)amino)-1-oxopropyl)-1,2,3,4-tetrahydro-, (3S-(2(R*(R*)),3R*))-. The classification codes are Angiotensin-Converting Enzyme Inhibitors, Antihypertensive Agents, Cardiovascular Agents, Enzyme Inhibitors and Protease Inhibitors. People should not breathe dust and avoid contact with skin and eyes.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 4.32; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.13; (4)ACD/LogD (pH 7.4): 0.76; (5)ACD/BCF (pH 5.5): 7.33; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 34.62; (8)ACD/KOC (pH 7.4): 1.49; (9)#H bond acceptors: 7; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 10; (12)Index of Refraction: 1.577; (13)Molar Refractivity: 119.51 cm3; (14)Molar Volume: 360.1 cm3; (15)Polarizability: 47.37×10-24 cm3; (16)Surface Tension: 52.2 dyne/cm; (17)Enthalpy of Vaporization: 102.32 kJ/mol; (18)Vapour Pressure: 2E-18 mmHg at 25°C; (19)Rotatable Bond Count: 10; (20)Exact Mass: 438.215472; (21)MonoIsotopic Mass: 438.215472; (22)Topological Polar Surface Area: 95.9; (23)Heavy Atom Count: 32.

Uses of Quinapril: It is an angiotensin-converting enzyme inhibitor (ACE inhibitor) used in the treatment of hypertension and congestive heart failure. Contraindications: 1. Pregnancy; 2. Impaired renal and liver function; 3. Patients with a history of angioedema related to; 4. previous treatment with an ACE inhibitor; 5. Hypersensitive to Quinapril.

People can use the following data to convert to the molecule structure.
1. SMILES: O=C(OCC)[C@@H](N[C@H](C(=O)N2[C@H](C(=O)O)Cc1c(cccc1)C2)C)CCc3ccccc3; 
2. InChI: InChI=1/C25H30N2O5/c1-3-32-25(31)21(14-13-18-9-5-4-6-10-18)26-17(2)23(28)27-16-20-12-8-7-11-19(20)15-22(27)24(29)30/h4-12,17,21-22,26H,3,13-16H2,1-2H3,(H,29,30)/t17-,21-,22-/m0/s1.

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