Sulfameter Property

Melting point:

214-216°C

Boiling point:

539.4±56.0 °C(Predicted)

Density 

1.3936 (rough estimate)

refractive index 

1.6200 (estimate)

storage temp. 

2-8°C

solubility 

DMSO (Slightly), Methanol (Sparingly)

pka

pKa 7.02 (Uncertain)

form 

powder

color 

white with faint yellow cast

Water Solubility 

0.47g/L(30 ºC)

Merck 

13,8999

BRN 

621130

InChIKey

GPTONYMQFTZPKC-UHFFFAOYSA-N

CAS DataBase Reference

651-06-9(CAS DataBase Reference)

NIST Chemistry Reference

Sulfameter(651-06-9)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

2

RTECS 

WP0525000

HS Code 

29350090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Sulfameter Chemical Properties,Usage,Production

Chemical Properties

Crystalline Solid

Originator

Sulla,Robins,US,1968

Uses

Sulfameter is an antibacterial.

Uses

Sulfameter is a sulfonamide antibiotic used as a leprostatic agent and to treat urinary tract infections. It has been investigated as a potential therapy for chloroquine-resistant malaria during pregnancy.

Definition

ChEBI: A sulfonamide consisting of pyrimidine having a methoxy substituent at the 5-position and a 4-aminobenzenesulfonamido group at the 2-position.

Manufacturing Process

2-Amino-5-methoxy pyrimidine is obtained having a melting point of about 300°C by condensation of methoxymalonic acid ester with guanidine carbonate in the presence of sodium ethylate. The resultant reaction product is then converted to 2-amino-5-methoxy-4,6-dichloropyrimidine (melting point 216°C to 217°C) by heating this reaction product with phosphorus oxychloride. The dichloro compound is then suspended in water with zinc dust and is tested in the presence of caustic alkaline or carbonates to produce the 2-aminod-methoxy pyrimidine compound, melting point 80°C to 82°C, (benzene).
12.6 g of 2-amino-5-methoxy pyrimidine, 26.4 g of carbethoxy-sulfanilic acid chloride and 50 cc of dry pyridine are heated for 30 minutes with frequent shaking to a temperature of 80°C. The reaction product is then mixed with 200 cc of water and with dilute hydrochloric acid (0.1 N) until the reaction is acid to Congo Red indicator. A precipitate is formed which is then filtered under suction, washed with distilled water, and dried at 150°C. A practically quantitative yield is recovered of 2-(p-carbethoxyaminobenzene-sulfonamido)- 5-methoxypyrimidine, melting point 248°C to 250°C.To hydrolyze the sulfapyrimidine compound, the same is heated at 90°C with 200 cc of 2 N potassium hydroxide solution for about one hour until complete solution is obtained. The resultant solution is then cooled to room temperature (25°C) and acidified with acetic acid to precipitate the hydrolyzed product, which is then recrystallized from dilute acetone admixed with animal charcoal.

Therapeutic Function

Antibacterial

General Description

Chemical structure: sulfonamide

Pharmaceutical Applications

2-Sulfanilamido-5-methoxypyrimidine. A long-acting compound with activity similar to that of sulfadiazine. Binding to plasma proteins is about 75%.

Biochem/physiol Actions

Sulfameter is a sulfonamide antibiotic. Sulfonamides block the synthesis of dihydrofolic acid by inhibiting the enzyme dihydropteroate synthase. Sulfonamides are competitive inhibitors of bacterial para-aminobenzoic acid (PABA), which is required for bacterial synthesis of folic acid. Sulfameter is a dihydrofolate reductase (DHFR) inhibitor. Sulfonamides are active against Gram positive bacteria and Gram negative bacteria. Mode of resistance is via the alteration of dihydropteroate synthase or alternative pathway for folic acid synthesis.