Product Name

  • Name

    Terazosin

  • EINECS
  • CAS No. 63590-64-7
  • Article Data12
  • CAS DataBase
  • Density 1.332 g/cm3
  • Solubility 25 mg/mL in water
  • Melting Point 281-283 °C
  • Formula C19H25N5O4
  • Boiling Point 664.5 °C at 760 mmHg
  • Molecular Weight 387.439
  • Flash Point 355.7 °C
  • Transport Information
  • Appearance white to off-white crystalline powder
  • Safety 26-36
  • Risk Codes 22-36/37/38
  • Molecular Structure Molecular Structure of 63590-64-7 (Terazosin)
  • Hazard Symbols HarmfulXn,IrritantXi
  • Synonyms Piperazine,1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-[(tetrahydro-2-furanyl)carbonyl]-(9CI);1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(tetrahydro-2-furoyl)piperazine;1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-[(2,3,4,5-tetrahydrofuran-2-yl)carbonyl]piperazine;Terazosin;Fosfomic;Vasomet;Terazosina;Terazosine;Flumarc;Blavin;
  • PSA 103.04000
  • LogP 1.64090

Synthetic route

tetrahydro-2-furancarboxylic acid
16874-33-2

tetrahydro-2-furancarboxylic acid

4-amino-6,7-dimethoxy-2-piperazin-1-ylquinazoline
60547-97-9

4-amino-6,7-dimethoxy-2-piperazin-1-ylquinazoline

terazosin
63590-64-7

terazosin

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; ethyl cyanoglyoxylate-2-oxime In N,N-dimethyl-formamide at 20℃;65%
prazosin hydrochloride
19237-84-4

prazosin hydrochloride

terazosin
63590-64-7

terazosin

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal In ethanol; water at 20℃;
2-chloro-6,7-dimethoxyquinazolin-4-amine
23680-84-4

2-chloro-6,7-dimethoxyquinazolin-4-amine

N-(tetrahydro-2-furoyl)-piperazine
63074-07-7

N-(tetrahydro-2-furoyl)-piperazine

terazosin
63590-64-7

terazosin

Methyl Cellosolve (ethylene glycol monomethyl ether)

Methyl Cellosolve (ethylene glycol monomethyl ether)

ammonium hydroxide

ammonium hydroxide

2-chloro-6,7-dimethoxyquinazolin-4-amine
23680-84-4

2-chloro-6,7-dimethoxyquinazolin-4-amine

N-(tetrahydro-2-furoyl)-piperazine
63074-07-7

N-(tetrahydro-2-furoyl)-piperazine

terazosin
63590-64-7

terazosin

Conditions
ConditionsYield
In water84 grams (87%)
In water90.8 grams (94%)
With triethylamine In water
1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-4-[[(2RS)2,3,4,5-tetrahydrofuran-2-yl]carbonyl]piperazine hydrochloride hydrobromide
943644-21-1

1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-4-[[(2RS)2,3,4,5-tetrahydrofuran-2-yl]carbonyl]piperazine hydrochloride hydrobromide

terazosin
63590-64-7

terazosin

Conditions
ConditionsYield
With ammonia In water at 25 - 45℃; for 1h; pH=8.4;
terazosin
63590-64-7

terazosin

terazosin hydrochloride

terazosin hydrochloride

Conditions
ConditionsYield
With hydrogenchloride for 2.86667h;
With hydrogenchloride In ethanol; water at 60 - 65℃; for 0.25h;

Terazosin Specification

The IUPAC name of Terazosin is [4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-(oxolan-2-yl)methanone. With the CAS registry number 63590-64-7, it is also named as Fosfomic. The product's categories are Terazosin; Intermediates & Fine Chemicals; Pharmaceuticals; API's; API. Besides, it is white to off-white crystalline powder. In addition, its molecular formula is C19H25N5O4 and molecular weight is 387.44.

The other characteristics of this product can be summarized as: (1)ACD/LogP: -0.96; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.95; (4)ACD/LogD (pH 7.4): -1.01; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 6.42; (9)#H bond acceptors: 9; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 4 ; (12)Index of Refraction: 1.636; (13)Molar Refractivity: 104.26 cm3; (14)Molar Volume: 290.6 cm3; (15)Surface Tension: 64.1 dyne/cm; (16)Density: 1.332 g/cm3; (17)Flash Point: 355.7 °C; (18)Melting Point: 281-283 °C; (19)Solubility: H2O: 25 mg/mL; (20)Enthalpy of Vaporization: 97.72 kJ/mol; (21)Boiling Point: 664.5 °C at 760 mmHg; (22)Vapour Pressure: 1.59E-17 mmHg at 25 °C.

Preparation of Terazosin: this chemical can be prepared by Furoic acid. The reaction equation is as follows:

Uses of Terazosin: this chemical is used for treatment of symptoms of an enlarged prostate (BPH) as selective alpha 1 antagonist. It is also used to lower the blood pressure. Additionally, it is used in the treatment of benign prostatic hyperplasia by blocking the action of adrenaline on smooth muscle of the bladder and the blood vessel walls.

When you are using this chemical, please be cautious about it as the following: it is irritating to eyes, respiratory system and skin. It is also harmful if swallowed. In case of contact with eyes, please rinse immediately with plenty of water and seek medical advice. And you should wear suitable protective clothing.

People can use the following data to convert to the molecule structure.
(1)SMILES: O=C(N3CCN(c2nc1cc(OC)c(OC)cc1c(n2)N)CC3)C4OCCC4
(2)InChI: InChI=1/C19H25N5O4/c1-26-15-10-12-13(11-16(15)27-2)21-19(22-17(12)20)24-7-5-23(6-8-24)18(25)14-4-3-9-28-14/h10-11,14H,3-9H2,1-2H3,(H2,20,21,22)
(3)InChIKey: VCKUSRYTPJJLNI-UHFFFAOYAV

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LDLo oral 3gm/kg (3000mg/kg)   United States Patent Document. Vol. #4734418,

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