CAS No.37178-37-3,ethyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)propanoate Suppliers

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ethyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)propanoate CAS:37178-37-3 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, speciali

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L-Tyrosine, 3-hydroxy-, ethyl esterAppearance:Off white to slight yellow solid Storage:Store in dry and cool condition Package:25kg or according to cutomer's demand Application:Chemical research/Pharmaceutical intermediates Transportation:By Sea,by A

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Synthetic route

: 64-17-5
ethanol

: 59-92-7
levodopa

: 37178-37-3
L-DOPA ethyl ester

Conditions

Conditions	Yield
With hydrogenchloride Fischer esterification;	100%
With hydrogenchloride Fisher esterfication;	100%
With thionyl chloride 1.) 0 deg C, 2 h, 2.) room temperature, overnight;
With thionyl chloride for 24h; Reflux;

: 59-92-7
levodopa

: 50-81-7
ascorbic acid

: 37178-37-3
L-DOPA ethyl ester

Conditions

Conditions	Yield
With thionyl chloride; 2,6-di-tert-butyl-4-methyl-phenol; sodium hydrogencarbonate; sodium sulfate In ethanol; water	88%
With thionyl chloride; 2,6-di-tert-butyl-4-methyl-phenol; sodium hydrogencarbonate; sodium sulfate In ethanol; water	88%

: 24424-99-5
di-tert-butyl dicarbonate

: 37178-37-3
L-DOPA ethyl ester

: 203398-44-1
N-(tert-butoxycarbonyl)-3,4-di(tert-butoxycarbonyloxy)-L-phenylalanine ethyl ester

Conditions

Conditions	Yield
With triethylamine In N,N-dimethyl-formamide at 20℃; Inert atmosphere;	97%
With triethylamine In N,N-dimethyl-formamide at 20℃; Inert atmosphere;	97%
With triethylamine In N,N-dimethyl-formamide 1.) 0 deg C, 2 h, 2.) room temperature, 48 h;	42.1 g

: 37178-37-3
L-DOPA ethyl ester

: 59-92-7
levodopa

Conditions

Conditions	Yield
With water; sodium chloride In dimethyl sulfoxide at 37℃; Rate constant; also human plasma as reagent;

: 40774-41-2
3-Bromoindan-1-one

: 37178-37-3
L-DOPA ethyl ester

: 3-(3,4-dihydroxyphenyl)-2-(3-oxoindan-1-ylamino)propionic acid ethyl ester

Conditions

Conditions	Yield
With triethylamine In dichloromethane at 0℃;

: 37178-37-3
L-DOPA ethyl ester

: N-(tert-butoxycarbonyl)-3,4-di(tert-butoxycarbonyloxy)-6-iodo-L-phenylalanine ethyl ester

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 42.1 g / triethylamine / dimethylformamide / 1.) 0 deg C, 2 h, 2.) room temperature, 48 h 2: 43 percent Turnov. / CF3CO2Ag, I2 / CH2Cl2 / 24 h / Ambient temperature View Scheme

: 37178-37-3
L-DOPA ethyl ester

: carbidopa monohydrate

: 37178-37-3
L-DOPA ethyl ester

: 69344-36-1
ethyl 3-(3,4-(dibenzyloxy)phenyl)-2-(tert-butoxycarbonylamino)propanoate

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2: potassium carbonate / acetone / 48 h / Reflux View Scheme

: 37178-37-3
L-DOPA ethyl ester

: 69295-27-8
ethyl 2-amino-3-(3,4-(dibenzyloxy)phenyl)propanoate

Conditions

Conditions	Yield
Multi-step reaction with 3 steps 1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2: potassium carbonate / acetone / 48 h / Reflux 3: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C View Scheme

: 37178-37-3
L-DOPA ethyl ester

: C23H22N2O3

Conditions

Conditions	Yield
Multi-step reaction with 6 steps 1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2.1: potassium carbonate / acetone / 48 h / Reflux 3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C 4.1: toluene / 24 h / Reflux 5.1: acetic acid; nitric acid / 1.5 h / 0 °C 5.2: 1.5 h / 80 °C 6.1: hydrazine hydrate / ethanol / 40 h / Reflux View Scheme

: 37178-37-3
L-DOPA ethyl ester

: C23H24N2O2

Conditions

Conditions	Yield
Multi-step reaction with 7 steps 1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2.1: potassium carbonate / acetone / 48 h / Reflux 3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C 4.1: toluene / 24 h / Reflux 5.1: acetic acid; nitric acid / 1.5 h / 0 °C 5.2: 1.5 h / 80 °C 6.1: hydrazine hydrate / ethanol / 40 h / Reflux 7.1: dimethyl sulfide borane / tetrahydrofuran / 30 h / Reflux View Scheme

Yield

Multi-step reaction with 7 steps
1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C
2.1: potassium carbonate / acetone / 48 h / Reflux
3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C
4.1: toluene / 24 h / Reflux
5.1: acetic acid; nitric acid / 1.5 h / 0 °C
5.2: 1.5 h / 80 °C
6.1: hydrazine hydrate / ethanol / 40 h / Reflux
7.1: dimethyl sulfide borane / tetrahydrofuran / 30 h / Reflux
View Scheme

: 37178-37-3
L-DOPA ethyl ester

: ethyl 3-(3,4-bis(benzyloxy)phenyl)-2-(1,3-dioxoisoindolin-2-yl)propanoate

Conditions

Conditions	Yield
Multi-step reaction with 4 steps 1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2: potassium carbonate / acetone / 48 h / Reflux 3: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C 4: toluene / 24 h / Reflux View Scheme

: 37178-37-3
L-DOPA ethyl ester

: (S)-2-(6,7-bis(benzyloxy)-2-oxo-1,2,3,4-tetrahydroquinolin-3-yl)isoindoline-1,3-dione

Conditions

Conditions	Yield
Multi-step reaction with 5 steps 1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2.1: potassium carbonate / acetone / 48 h / Reflux 3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C 4.1: toluene / 24 h / Reflux 5.1: acetic acid; nitric acid / 1.5 h / 0 °C 5.2: 1.5 h / 80 °C View Scheme

: 37178-37-3
L-DOPA ethyl ester

: tert-butyl ((S)-3-(benzyloxy)-1-(((S)-6,7-bis(benzyloxy)-1,2,3,4-tetrahydroquinolin-3-yl)amino)-1-oxopropan-2-yl)carbamate

Conditions

Conditions	Yield
Multi-step reaction with 8 steps 1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C 2.1: potassium carbonate / acetone / 48 h / Reflux 3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C 4.1: toluene / 24 h / Reflux 5.1: acetic acid; nitric acid / 1.5 h / 0 °C 5.2: 1.5 h / 80 °C 6.1: hydrazine hydrate / ethanol / 40 h / Reflux 7.1: dimethyl sulfide borane / tetrahydrofuran / 30 h / Reflux 8.1: benzyl chloroformate; 4-methyl-morpholine / dichloromethane / 6 h / -78 - 20 °C View Scheme

Yield

Multi-step reaction with 8 steps
1.1: sodium hydrogencarbonate / tetrahydrofuran / 16 h / 20 °C
2.1: potassium carbonate / acetone / 48 h / Reflux
3.1: trifluoroacetic acid / dichloromethane / 26 h / 0 - 20 °C
4.1: toluene / 24 h / Reflux
5.1: acetic acid; nitric acid / 1.5 h / 0 °C
5.2: 1.5 h / 80 °C
6.1: hydrazine hydrate / ethanol / 40 h / Reflux
7.1: dimethyl sulfide borane / tetrahydrofuran / 30 h / Reflux
8.1: benzyl chloroformate; 4-methyl-morpholine / dichloromethane / 6 h / -78 - 20 °C
View Scheme

: 24424-99-5
di-tert-butyl dicarbonate

: 37178-37-3
L-DOPA ethyl ester

: 1313214-06-0
N-(tert-butoxycarbonyl)-3,4-(dihydroxy)-L-phenylalanine ethyl ester

Conditions

Conditions	Yield
With sodium hydrogencarbonate In tetrahydrofuran at 20℃; for 16h;

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