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inquiry2-METHYL-3-(3,4-DIHYDROXYPHENYL)-DL-ALANINE Application:2-METHYL-3-(3,4-DIHYDROXYPHENYL)-DL-ALANINE
Tyrosine, 3-hydroxy-a-methyl-Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:pharmaceutical intermediate Transportation:by air, by sea, by express
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
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Conditions | Yield |
---|---|
(hydrolysis); |
2-Amino-3-(3,4-bis-benzyloxy-phenyl)-2-methyl-propionic acid ethyl ester; hydrochloride
alpha-methyldopa
Conditions | Yield |
---|---|
With hydrogenchloride; hydrogen; palladium on activated charcoal 1.) ethanol; Yield given. Multistep reaction; |
alpha-methyldopa
Conditions | Yield |
---|---|
With hydrogen bromide |
alpha-methyldopa
Conditions | Yield |
---|---|
With hydrogenchloride |
L-Dopa ethyl ester hydrochloride
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 |
3-(3,4-Bis-benzyloxy-phenyl)-2-{[1-(2,4,6-trimethyl-phenyl)-meth-(Z)-ylidene]-amino}-propionic acid ethyl ester
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 |
1-Fluoro-2-isocyanato-benzene
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% |
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; | 90% |
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran at 40 - 50℃; for 3h; | 90% |
cis-dichlorobis(triphenylphosphine)platinum(II)
alpha-methyldopa
Conditions | Yield |
---|---|
With potassium hydroxide; dichloromethane In methanol; benzene to a suspn. of substituted catechol in benzene was added MeOH soln. of KOH; prepd. soln. was syringed into suspn. of Pt complex in benzene; stirring at room temp. for 3.5 h (Ar); filtration, evapn., washing with water, drying in vac., dissoln. in CH2Cl2, filtration, evapn., washing with ether, drying in vac.; elem. anal.; | 84% |
Conditions | Yield |
---|---|
In acetonitrile for 1.5h; Heating; | 60% |
1-chloroethyl pivalate
alpha-methyldopa
A
α-methyldopa pivaloylethyl ester
B
3-(3,4-Dihydroxy-phenyl)-2-[1-(2,2-dimethyl-propionyloxy)-ethylamino]-2-methyl-propionic acid 1-(2,2-dimethyl-propionyloxy)-ethyl ester
Conditions | Yield |
---|---|
With 4 A molecular sieve In various solvent(s) at 75℃; for 8h; Product distribution; other temperature, various solvents; other alkylating agents; other amino acids; with or without LiBr; |
alpha-methyldopa
2-Amino-3-(3,4-dioxo-cyclohexa-1,5-dienyl)-2-methyl-propionic acid
Conditions | Yield |
---|---|
With phenoloxidase from Lucilia cuprina pupae Enzyme kinetics; Oxidation; | |
With oxygen In phosphate buffer at 20℃; pH=6.8; Enzyme kinetics; Further Variations:; Reagents; |
alpha-methyldopa
α-methyldopachrome
Conditions | Yield |
---|---|
With sodium periodate In phosphate buffer for 0.166667h; pH=6.0; Oxidation; cyclization; |
4-amino-2,3-dimethyl-1-phenylpyrazolin-5-one
alpha-methyldopa
[Fe(HOC6H2(O)(CH2C(CH3)(NH2)COOH)NHCC(O)N(C6H5)N(CH3)C(CH3))2(CN)(H2O)]
Conditions | Yield |
---|---|
In water hot aq. soln. of catecholamine was mixed with hot aq. soln. of 4-aminoantipyrine (60°C); mixt. was mixed with stirring with hot soln. of Fe compd. (60°C); mixt. was kept at room temp. for 6 h; filtered; washed (H2O, pentane); collected; dried in vac. over CaCl2; elem. anal.; |
4-amino-2,3-dimethyl-1-phenylpyrazolin-5-one
alpha-methyldopa
copper(II) sulfate
Conditions | Yield |
---|---|
With ammonia In water ammonia soln. was added dropwise with stirring to soln. of Cu salt; hot (60°C) aq. soln. of catecholamine and hot (60°C) aq. soln.of 4-aminoantipyrine were added with stirring; concd.; kept in cupboard; filtered; washed (H2O, pentane); collected; dried in vac. over CaCl2; elem. anal.; |
Conditions | Yield |
---|---|
Stage #1: alpha-methyldopa With potassium hydroxide In methanol; ethanol for 1h; Stage #2: o-phthalic dicarboxaldehyde In methanol; ethanol for 2h; |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: potassium hydroxide / methanol; ethanol / 1 h 1.2: 2 h 2.1: methanol / 2 h / Reflux View Scheme |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 2h; Heating; |
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