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CAS No. : | 583-47-1 | MDL No. : | MFCD18375238 |
Formula : | C10H9NO3 | Boiling Point : | - |
Linear Structure Formula : | C4H4(C6H5)NO3 | InChI Key : | GQBIVYSGPXCELZ-UHFFFAOYSA-N |
M.W : | 191.18 | Pubchem ID : | 68501 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P264-P270-P301+P312-P330 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
56% | In tetrahydrofuran; at 60℃; for 60.0h;Product distribution / selectivity; | Example 3 (Synthesis of N-Carboxyphenylalanine Anhydride) Into a two-neck round-bottom flask having a capacity of 25 mL and equipped with a Dimroth condenser were introduced 165 mg (1 mmol) of phenylalanine and 10 mL of tetrahydrofuran in a nitrogen atmosphere. To the resultant solution was added 396 mg (1 mmol) of bis(pentafluorophenyl) carbonate. The mixture was stirred at 60 C. for 60 hours. This reaction mixture was analyzed by NMR spectroscopy using dioxane as an internal reference. As a result, it was ascertained that N-carboxyphenylalanine anhydride had been obtained in a yield of 56%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | In tetrahydrofuran; at 60℃; for 91.0h;Product distribution / selectivity; | Example 2 (Synthesis of N-Carboxyphenylalanine Anhydride) Into a two-neck round-bottom flask having a capacity of 25 mL and equipped with a Dimroth condenser were introduced 165 mg (1 mmol) of phenylalanine and 10 mL of tetrahydrofuran in a nitrogen atmosphere. To the resultant solution was added 394 mg (1 mmol) of bis(2,4-dinitrophenyl) carbonate. The mixture was stirred at 60 C. for 91 hours. This reaction mixture was analyzed by NMR spectroscopy using dioxane as an internal reference. As a result, it was ascertained that N-carboxyphenylalanine anhydride had been obtained in a yield of 100%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
10% | In tetrahydrofuran; at 60℃; for 27.0h;Product distribution / selectivity; | Example 1 (Synthesis of N-Carboxyphenylalanine Anhydride) Into a two-neck round-bottom flask having a capacity of 25 mL and equipped with a Dimroth condenser were introduced 165 mg (1 mmol) of phenylalanine and 10 mL of tetrahydrofuran in a nitrogen atmosphere. To the resultant solution was added 304 mg (1 mmol) of bis(4-nitrophenyl) carbonate, The mixture was stirred at 60 C. for 27 hours. This reaction mixture was analyzed by NMR spectroscopy using dioxane as an internal reference. As a result, it was found that N-carboxyphenylalanine anhydride had been obtained in a yield of 13%. Furthermore, this reaction mixture was subjected to column isolation to obtain N-carboxyphenylalanine anhydride in an amount of 19 mg (isolation yield, 10%). Spectral data for the N-carboxyphenylalanine anhydride: 1H NMR (CDCl3) delta: 2.98-3.30 (m, 2H), 4.52-4.55 (m, 1H, -CH<), 6.21 (brs, 1H, -NH-), 7.17-7.38 (m, 5H). 13C NMR (CDCl3) delta: 37.76, 58.80, 127.98, 129.16, 129.20, 133.81, 151.88, 168.65. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57% | In chloroform-d1; for 96.0h;Heating / reflux;Product distribution / selectivity; | Into a two-neck round-bottom flask having a capacity of 10 mL and equipped with a Dimroth condenser were introduced 99 mg (0.3 mmol) of the N-(4-nitrophenoxycarbonyl)phenylalanine and 3 mL of chloroform-d in a nitrogen atmosphere. The mixture was refluxed for 128 hours. This reaction mixture was analyzed by NMR spectroscopy using dioxane as an internal reference. As a result, it was found that N-carboxyphenylalanine anhydride had been obtained in a yield of 57% in a reaction time of 96 hours. Furthermore, this reaction mixture was subjected to column isolation to obtain N-carboxyphenylalanine anhydride. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
>= 99% | With 2,2-diphenylacetic acid; phenol; In butanone; at 80℃; for 30.0h;Inert atmosphere;Product distribution / selectivity; | Example 3Under a nitrogen atmosphere, 430 mg (2 mmol) of diphenyl carbonate and 5 mL of 2-butanone were loaded into a round bottom flask having a volume of 100 mL, and then the mixture was stirred at -20C. A solution prepared by dissolving 550 mg (2 mmol) of 1-ethyl-3-methylimidazolium phenylalanine salt in 15 mL of 2-butanone was slowly dropped to the solution, and then the mixture was stirredat -20 C for 8 hours. After that, a 1M aqueous HCl solution was added to the mixture to terminate the reaction. The resultant was concentrated with an evaporator. Next, water was added to the concentrated product, and then the resultant was extracted with ethyl acetate. After that, the resultant was concentrated with an evaporator. Thus, a crude product was obtained. Next, the crude product was purified by column chromatography. Thus, N-phenoxycarbonyl-L-phenylalanine was obtained. An isolation amount and an isolation yield were 528. 9 mg and 93%, respectively.Under a nitrogen atmosphere, 571 mg (2 mmol) of N-phenoxycarbonyl-L-phenylalanine, 424 mg (2 mmol) of diphenylacetic acid, and 20 mL of acetonitrile were loaded into a two-necked round bottom flask having a volume of 100 mL and mounted with a Dimroth condenser, and then the mixture was stirred at 80C for 30 hours. The fact that N-carboxy-phenylalanine anhydride was obtained in a yield of 99% or more was confirmed by subjecting the reaction mixture to NMR determination. |
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