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Cas Database

Name	3-Hydroxy-alpha-methyltyrosine	EINECS	N/A
CAS No.	55-40-3	Density	1.403g/cm³
PSA	103.78000	LogP	1.14260
Solubility	N/A	Melting Point	300-301 °C (decomp)
Formula	C10H13 N O4	Boiling Point	441.6°Cat760mmHg
Molecular Weight	211.218	Flash Point	220.9°C
Transport Information	N/A	Appearance	N/A
Safety		Risk Codes	R36
Molecular Structure		Hazard Symbols	Xi
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	Article Data	20

3-Hydroxy-alpha-methyltyrosine Synthetic route

: 5934-66-7
DL-N-Acetyl-α-methyl-β-<3,4-dimethoxy-phenyl>-alanin

: 55-40-3
alpha-methyldopa

Conditions

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

Conditions	Yield
With hydrogenchloride; hydrogen; palladium on activated charcoal 1.) ethanol; Yield given. Multistep reaction;

(+-)-2-amino-3-<3.4-dimethoxy-phenyl>-2-methyl-propionic acid: (+-)-2-amino-3-<3.4-dimethoxy-phenyl>-2-methyl-propionic acid

: 55-40-3
alpha-methyldopa

Conditions

Conditions	Yield
With hydrogen bromide

(+-)-2-amino-3-<3-hydroxy-4-methoxy-phenyl>-2-methyl-propionic acid: (+-)-2-amino-3-<3-hydroxy-4-methoxy-phenyl>-2-methyl-propionic acid

: 55-40-3
alpha-methyldopa

Conditions

Conditions	Yield
With hydrogenchloride

: 23234-41-5
L-Dopa ethyl ester hydrochloride

: 55-40-3
alpha-methyldopa

Conditions

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

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

: 2543-46-6
(±)-3-(3,4-dimethoxyphenyl)-2-amino-2-methylpropanenitrile

: 55-40-3
alpha-methyldopa

Conditions

Conditions	Yield
With water; hydrogen bromide

: 16744-98-2
1-Fluoro-2-isocyanato-benzene

: 55-40-3
alpha-methyldopa

: 3-(3,4-dihydroxyphenyl)-2-(3-(2-fluorophenyl)ureido)-2-methylpropanoic acid

Conditions

Conditions	Yield
With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; Catalytic behavior; Reagent/catalyst; Solvent;	90%

: 55-40-3
alpha-methyldopa

: 2493-02-9
4-bromophenyl isocyanate

: (3-(4-bromophenyl)ureido)-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid

Conditions

Conditions	Yield
With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h;	90%

: 55-40-3
alpha-methyldopa

: 2285-12-3
o-trifluoromethyl-phenylisocyanate

: 3-(3,4-dihydroxyphenyl)-2-methyl-2-(3-(2-(trifluoromethyl)phenyl)ureido)propanoic acid

Conditions

Conditions	Yield
With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h;	90%

3-Hydroxy-alpha-methyltyrosine Chemical Properties

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^-24cm³
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
.

3-Hydroxy-alpha-methyltyrosine Uses

3-Hydroxy-alpha-methyltyrosine (CAS NO.55-40-3) is used in organic synthesis.

3-Hydroxy-alpha-methyltyrosine Safety Profile

Hazard Codes: Irritant 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

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