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CAS No. : | 149597-91-1 | MDL No. : | MFCD01631990 |
Formula : | C15H15NO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | PECGVEGMRUZOML-CQSZACIVSA-N |
M.W : | 241.29 | Pubchem ID : | 1520861 |
Synonyms : |
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Chemical Name : | (R)-2-Amino-3,3-diphenylpropanoic acid |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* 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 |
---|---|---|
Example 1 (Scheme I):; N-(2-oxo-2-propoxyethyl)-beta-phenyl-D-phenylalanyl-N-r(1-amino-6-isoquinolinyl)methyll- L-prolinamide (1A); A: N-[2-(1 , 1 -Dimethylethoxy)-2-oxoethyll-3-phenyl-D-phenylalanine (a); To a stirred mixture of <strong>[149597-91-1]D-<strong>[149597-91-1]diphenylalanine</strong></strong>, H-D-Dpa-OH, (20.0 g, 82.9 mmol) and potassium carbonate (17.2 g, 125 mmol) in dioxane/water (1 :1 (v/v), 100ml) was added terf-butyl bromoacetate (12.2 ml, 83.0 mmol). After stirring overnight water (100ml) was added and the pH adjusted to 5.5 with 0.5M citric acid solution. The resultant precipitate was filtered off, washed with water then diethyl ether and dried under vacuum to give10.4 g of the title compound ^1 |
Yield | Reaction Conditions | Operation in experiment |
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The mother liquor is evaporated to dryness to afford 84.6 g of a white foam. This is recrystallized from 350 mL of methanol as described above to afford 3.6 g of product; mp192-194 C., [alpha]D25 =-84. The mother liquor is evaporated to afford 79.6 g of a solid; [alpha]D25 -62 which is used in the preparation of L-(+)-enantiomer (see Example 2). | ||
According to certain embodiments: Y1 is D-tryptophan, L-tryptophan, D-tyrosine, L-tyrosine, D-3,3-diphenyl-alanine, L-3,3-diphenyl-alanine, D-H-3-(4-pyridyl)alanine, L-H-3-(4-pyridyl)alanine, D-H-3-(3-pyridyl)alanine, L-H-3-(3-pyridyl)alanine, ... | ||
According to certain embodiments: Y4 is ... D-tryptophan, L-tryptophan, D-tyrosine, L-tyrosine, D-3,3-diphenyl-alanine, L-3,3-diphenyl-alanine, D-H-3-(4-pyridyl)alanine, L-H-3-(4-pyridyl)alanine, ... |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Reference Example 1: Synthesis of 2-amino-3,3-diphenyl propionic acid; Reaction was carried out in a similar manner to Example 26, except that 2.5 g of N-Boc-glycine methyl ester was used in place of 1-dimethylethyl-(2R)-(2,6-dichlorophenyl)-5-oxo-3-((1'R)-phenylethyl) tetrahydro-1H-1-imidazolecarboxylate to obtain 640 mg of 2-(N-Boc-amino)-3,3-diphenylpropionic acid methyl ester as a colorless oily material (yield: 14%). Further, 354 mg of 2- (N-Boc-amino) -3,3-diphenylpropionic acid methyl ester was mixed with a 6 M solution of aqueous hydrochloric acid, and the mixture was refluxed for 5 hours. Thereafter, the mixture was washed with toluene, and neutralized with a 30% aqueous solution of sodium hydroxide to obtain a white solid of 2-amino-3,3-diphenylpropionic acid. The retention time of the respective isomers was confirmed by using the product. |