Ethyl bromopyruvate

Structural formula

Business number 01G1
Molecular formula C5H7BrO3
Molecular weight 195.01
label

Ethyl bromopyruvate,

BrCH2COCOOC2H5

Numbering system

CAS number:70-23-5

MDL number:MFCD00000204

EINECS number:200-729-6

RTECS number:None

BRN number:1760158

PubChem ID:None

Physical property data

1. Properties: colorless liquid.

2. Density (g/mL, 25/4?): 1.56

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): Undetermined

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, 1.33kPa): 98? 100

7. Refractive index: 1.4690

8. Flash point (ºC): 98

9. Specific rotation (º): Undetermined

p>

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12. Saturated vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit (%, V /V): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Undetermined.

Toxicological data

None

Ecological data

None

Molecular structure data

1. Molar refractive index: 34.74

2. Molar volume (cm3/mol): 124.8

3. Isotonic specific volume (90.2K ): 313.0

4. Surface tension (dyne/cm): 39.5

5. Polarizability (10-24cm3): 13.77

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 1.2

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 3

4. Number of rotatable chemical bonds: 4

5. Number of tautomers: 2

6. Topological molecule polar surface area 43.4

7. Number of heavy atoms: 9

8. Surface charge: 0

9. Complexity: 121

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

None

Storage method

This product should be sealed with nitrogen and protected from light at 0~4?.Save.

Synthesis method

1. Obtained from ethyl lactate through oxidation and bromination: ethyl lactate, NBS (N-bromododecimide) and tetrachloride Add carbon dioxide into a dry reaction pot and heat to reflux for 5.5 hours while stirring. Cool and filter, evaporate the carbon tetrachloride from the filtrate, distill under reduced pressure, and collect the 71~73°C (0.67kPa) fraction, which is ethyl bromopyruvate.

2. Preparation method:

Into a reaction bottle equipped with a stirrer, thermometer, and reflux condenser, add 66g (0.56mol) of freshly steamed ethyl lactate (2), 900mL of carbon tetrachloride, and 200g of NBS ( 1.14mol), heated to (77±1)°C in a water bath, stirred and refluxed for 5 to 6 hours, until the reaction solution changed from red to orange. Hydrogen bromide gas is released during the reaction. Place in ice-salt bath overnight and filter out succinimide. After the filtrate is distilled under normal pressure to recover carbon tetrachloride, it is distilled under reduced pressure and the fraction at 71~73?/0.67kPa is collected to obtain a yellow transparent liquid ethyl bromopyruvate (1)?56.8g, The yield is 52%. nD251.465?1.4673. Note: ? It has a strong tear-inducing effect. Store it in a refrigerator after being airtight. [1]

Purpose

Organic Synthesis.                      

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Reduced glutathione

Reduced glutathione structural formula

Structural formula

Business number 01G0
Molecular formula C10H17N3O6S
Molecular weight 307.33
label

5-L-Glutamyl-L-Cysteinylglycine,

L-glutathione,

glutathione wins,

thiofuran,

Triamino acid,

L-Glutathione reduced,

Glutathione,

Reduced,

Free acid,

Glycine?-L-glutamyl-L-cysteinyl-glycine,

N-(N-L-?-Glutamyl-L-cysteinyl) glycine,

GSH,

antidote,

amino acid drugs,

intermediates,

Biochemical reagents

Numbering system

CAS number:70-18-8

MDL number:MFCD00065939

EINECS number:200-725-4

RTECS number:MC0556000

BRN number:1729812

PubChem ID:None

Physical property data

1. Appearance: white crystalline powder

2. Density (g/mL, 25/4?): 1.441

3. Relative vapor density (g/mL, Air=1): Uncertain

4. Melting point (ºC): 192-195 (dec.)(lit.)

5. Boiling point (ºC, normal pressure): No Determined

6. Boiling point (ºC, 5.2kPa): Uncertain

7. Refractive index: -17 ° (C=2, H2O)

8 . Flash point (ºC): Uncertain

9. Specific rotation (º): -16.5 º (c=2, H2O)

10. Autoignition point or ignition temperature (ºC): Uncertain

11. Vapor pressure (kPa, 25ºC): Uncertain

12. Saturated vapor pressure (kPa, 60ºC): Uncertain

13. Heat of combustion (KJ/mol): Uncertain

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

p>

16. The logarithmic value of the oil-water (octanol/water) partition coefficient: Uncertain

17. The upper limit of explosion (%, V/V): Uncertain

18. Lower explosion limit (%, V/V): Uncertain

19. Solubility: Soluble in water (50 mg/mL), dilute alcohol, liquid ammonia and N-dimethylformamide, Insoluble in ethanol, ether and acetone

Toxicological data

Acute toxicity: smallMouse oral LC50: 5 mg/kg; Mouse intraperitoneal LC50: 4020 mg/kg; Mouse intravenous LC50: 2238 mg/kg; Mouse subcutaneous injection LC50: 5 mg/kg; Mouse intramuscular LC50 : 4 mg/kg; Breeding: Rat oral administration TDLo: 1250 mg/kg plate; mouse liver DNA inhibition test system: 1 mmol/L;

Ecological data

None

Molecular structure data

1. Molar refractive index: 70.10

2. Molar volume (cm3/mol): 213.2

3. Isotonic specific volume (90.2K ): 615.2

4. Surface tension (dyne/cm): 69.3

5. Polarizability (10-24cm3): 27.79

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): -4.5

2. Number of hydrogen bond donors: 6

3. Number of hydrogen bond acceptors: 8

4. Number of rotatable chemical bonds: 9

5. Number of tautomers: 4

6. Topological molecule polar surface area 160

7. Number of heavy atoms: 20

8. Surface charge: 0

9. Complexity: 389

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 2

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

1. It is the prosthetic group of glyceraldehyde phosphate dehydrogenase, the coenzyme of glyoxalase and triose phosphate dehydrogenase, and participates in tricarboxylic acid in the body. Acid cycle and sugar metabolism
enable the human body to obtain high energy. It can activate sulfhydryl (-SH) enzymes in the body, such as cholinesterase (related to allergic diseases), and protect the body from the poison of heavy metals and epoxy compounds. It can promote the metabolism of carbohydrates, fats and proteins, and can also control the metabolic process of cells. It also has radioactive protection and inhibits melanin deposition.

2. Found in tobacco leaves.

Storage method

This product should be kept sealed. Storage temperature 4ºC

Synthesis method

Widely present in living organisms. It mainly plays the role of redox electron transfer and detoxification in living organisms.

Purpose

1. Used as biochemical reagent, thiolase (protein) protective agent and detoxification drug.

2.It has a protective effect on red blood cell membranes. It can prevent hemolysis, thereby reducing methemoglobin; it can improve the symptoms of bone marrow tissue inflammation caused by radiation therapy, radioactive drugs, and radiation; it can inhibit the formation of fatty liver, and can also improve the symptoms of toxic hepatitis and infectious hepatitis. . It can resist allergies, correct the imbalance of acetylcholine and cholinesterase, prevent skin pigmentation, and is used in ophthalmology to inhibit the instability of crystal protein sulfhydryl groups, inhibit progressive cataracts and control the development of corneal and retinal diseases, etc.

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2-bromoacetophenone

2-bromoacetophenone structural formula

Structural formula

Business number 01FZ
Molecular formula C8H7BrO
Molecular weight 199.05
label

Bromoacetophenone,

2-Bromo-1-phenylethanone,

?-bromoacetophenone,

Benzoyl Methyl Bromide,

Bromoacetophenone,

Alpha-bromoacetophenone,

2-Bromoacetophenone,

Phenacyl bromide,

Bromoacetylbenzene,

?-Bromoacetophenone,

Aromatic aldehydes, ketones and their derivatives

Numbering system

CAS number:70-11-1

MDL number:MFCD00000195

EINECS number:200-724-9

RTECS number:None

BRN number:606474

PubChem number:24887194

Physical property data

1. Properties: White needle-like crystals precipitated from ethanol

2. Density (g/mL, 25/4?): 1.476

3. Relative vapor density (g/mL, air=1): Uncertain

4. Melting point (ºC): 48-51

5. Boiling point (ºC, normal pressure): Uncertain

p>

6. Boiling point (ºC, 18mmHg): 135

7. Refractive index: 1.709 (15?)

8. Flash point (ºF): >230

9. Specific rotation (º): Uncertain

10. Autoignition point or ignition temperature (ºC): Uncertain

11. Vapor pressure ( kPa, 25ºC): Uncertain

12. Saturated vapor pressure (kPa, 60ºC): Uncertain

13. Heat of combustion (KJ/mol): Uncertain

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

16. Oil-water (octanol/water) partition coefficient relationship Value: Uncertain

17. Explosion upper limit (%, V/V): Uncertain

18. Explosion lower limit (%, V/V): Uncertain

19. Solubility: Easily soluble in ether, benzene and chloroform, soluble in ethanol and hot petroleum ether, insoluble in water

Toxicological data

None

Ecological data

None

Molecular structure data

1. Molar refractive index: 44.01

2. Molar volume (cm3/mol): 134.1

3. Isotonic specific volume (90.2K ): 344.5

4. Surface tension (dyne/cm): 43.5

5. Polarizability (10-24cm3): 17.44

Compute chemical data

1. Hydrophobic parameter calculation reference value (XlogP): 2.5

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 1

4. Number of rotatable chemical bonds: 2

5. Number of tautomers: 2

6. Topological molecular polar surface area (TPSA): 17.1

7. Number of heavy atoms: 10

8. Surface charge: 0

9. Complexity: 116

10. Number of isotope atoms : 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the chemical bond configuration Number of centers: 0

14, Number of uncertain chemical bond stereocenters: 0

15, Number of covalent bond units: 1

Properties and stability

This product is toxic and has strong tear-inducing properties. It can burn when exposed to open fire and emit a large amount of tear-inducing vapor when exposed to high heat.
?

Storage method

This product should be sealed and stored away from light.

Packaged in glass bottles with wooden boxes lined with padding or iron drums. Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Store and transport separately from oxidants and edible raw materials. When transporting, load and unload gently to prevent damage to the container.

Synthesis method

Originated from bromination of acetophenone. Add water and benzene into the reaction pot, stir, quickly add bromine at 25°C, slowly raise the temperature to 55-60°C, react for 10-20 minutes, add ice water, cool to 0-5°C, filter, and use for filter cake Wash with ice water and spin dry to obtain bromoacetophenone. The yield is 92%. During the above reaction, a thunderous sound can be emitted from the reaction pot. It is also possible to react acetophenone with bromine dropwise in an ether solvent, and add anhydrous aluminum trichloride to the reaction solution. This method obtains crude product with a yield of 88-96%. In addition, acetophenone and bromine can also be produced by the interaction of acetophenone and bromine in the presence of aluminum oxide, with a yield of 94%.

Purpose

This product is a raw material for organic synthesis and an intermediate for medicines and dyes. In the pharmaceutical industry, it is used to inhibit blood speed, etc., and can be synthesized with thiourea to synthesize ?-amino-4-phenylthiazole. Determination of hydroxy acids. Organic Synthesis.

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