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| CAS No.: | 55-40-3 |
|---|---|
| Name: | 2-METHYL-3-(3,4-DIHYDROXYPHENYL)-DL-ALANINE |
| Molecular Structure: | |
|
|
|
| Formula: | C10H13 N O4 |
| Molecular Weight: | 211.218 |
| Synonyms: | Alanine,3-(3,4-dihydroxyphenyl)-2-methyl- (6CI,8CI); (?à)-Methyldopa; (?à)-a-Methyldopa; 2-(3,4-Dihydroxybenzyl)-2-aminopropanoic acid;DL-2-Methyl-3-(3,4-dihydroxyphenyl)alanine; DL-Methyldopa; DL-a-Methyl DOPA; DL-a-Methyl-3-(3,4-dihydroxyphenyl)alanine;Metholes; Mulfasin; Racemic a-methyldopa |
| Density: | 1.403g/cm3 |
| Melting Point: | 300-301 °C (decomp) |
| Boiling Point: | 441.6°Cat760mmHg |
| Flash Point: | 220.9°C |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | R36 |
| PSA: | 103.78000 |
| LogP: | 1.14260 |
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| Conditions | Yield |
|---|---|
| (hydrolysis); |
- 84713-76-8
2-Amino-3-(3,4-bis-benzyloxy-phenyl)-2-methyl-propionic acid ethyl ester; hydrochloride
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| With hydrogenchloride; hydrogen; palladium on activated charcoal 1.) ethanol; Yield given. Multistep reaction; |
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| With hydrogen bromide |
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| With hydrogenchloride |
- 23234-41-5
L-Dopa ethyl ester hydrochloride
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| Multi-step reaction with 3 steps 1: 2.) K2CO3 / 2.) Acetone 2: 1.) solid KOH 2.) 1N HCl / 1.) tetrabutylammonium iodide / 1.) acetonitrile, 0 to 15 deg C 2.) ether, 0 deg C. 3: 1.) hydrogen 2.) 6N HCl / 1.) 10 percent Pd/C / 1.) ethanol View Scheme |
- 84713-73-5
3-(3,4-Bis-benzyloxy-phenyl)-2-{[1-(2,4,6-trimethyl-phenyl)-meth-(Z)-ylidene]-amino}-propionic acid ethyl ester
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| Multi-step reaction with 2 steps 1: 1.) solid KOH 2.) 1N HCl / 1.) tetrabutylammonium iodide / 1.) acetonitrile, 0 to 15 deg C 2.) ether, 0 deg C. 2: 1.) hydrogen 2.) 6N HCl / 1.) 10 percent Pd/C / 1.) ethanol View Scheme |
| Conditions | Yield |
|---|---|
| With water; hydrogen bromide |
- 16744-98-2
1-Fluoro-2-isocyanato-benzene
- 55-40-3
alpha-methyldopa
| Conditions | Yield |
|---|---|
| With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; Catalytic behavior; Reagent/catalyst; Solvent; | 90% |
| Conditions | Yield |
|---|---|
| With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; | 90% |
| Conditions | Yield |
|---|---|
| With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; | 90% |
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Chemistry
IUPAC Name: 2-Amino-3-(3,4-dihydroxyphenyl)butanoic acid
Empirical Formula: C10H13NO4
Molecular Weight: 211.2145
Freely Rotating Bonds: 6
Polar Surface Area: 48 Å2
Index of Refraction: 1.629
Molar Refractivity: 53.89 cm3
Molar Volume: 151.5 cm3
Polarizability: 21.36× 10-24 cm3
Surface Tension: 71.2 dyne/cm
Density: 1.393 g/cm3
Flash Point: 216.2 °C
Enthalpy of Vaporization: 72.72 kJ/mol
Boiling Point: 433.9 °C at 760 mmHg
Vapour Pressure: 2.69E-08 mmHg at 25°C
The Cas Register Number of 3-Hydroxy-alpha-methyltyrosine is 55-40-3.The chemical synonyms of 3-Hydroxy-alpha-methyltyrosine (CAS NO.55-40-3) are 2-Amino-3-(3,4-dihydroxyphenyl)butanoic acid .The molecular structure of 3-Hydroxy-alpha-methyltyrosine (CAS NO.55-40-3) is
.bmp)
.
Uses
3-Hydroxy-alpha-methyltyrosine (CAS NO.55-40-3) is used in organic synthesis.
Safety Profile
Hazard Codes: 
Xi
Risk Statements: 36
R36: Irritating to eyes.
Safety Statements: 26-36/37
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37: Wear suitable protective clothing and gloves.
WGK Germany: 3