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HD-Phe-OtBu.HCl

HD-Phe-OtBu.HCl is a phenylalanine analogue.
HD-Phe-OtBu.HCl
HD-Phe-OtBu.HCl Chemical Structure CAS No.: 3403-25-6
Product category: Amino Acid Derivatives
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
100g
Other Sizes
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Product Description
HD-Phe-OtBu.HCl is a phenylalanine analogue.
HD-Phe-OtBu.HCl (D-Phenylalanine tert-butyl ester hydrochloride, CAS 3403-25-6) is a phenylalanine derivative where the carboxylic acid is protected as a tert-butyl ester and the amino group is in the hydrochloride salt form. Its molecular formula is C13H20ClNO2 with a molecular weight of 257.76 g/mol. It is a solid intended for research use. This compound is a phenylalanine analogue and is used as a building block in peptide synthesis. The tert-butyl ester provides acid-labile protection for the carboxylic acid, which can be removed under acidic conditions (e.g., TFA). The hydrochloride salt enhances solubility and stability. The D-configuration provides resistance to proteolytic degradation.
Biological Activity I Assay Protocols (From Reference)
Targets
This compound does not possess a specific biological target; its primary function is as a chemical building block for peptide synthesis. As a phenylalanine derivative, it is used to introduce D-phenylalanine residues into peptides with the carboxylic acid protected as a tert-butyl ester. The tert-butyl group protects the carboxylic acid during peptide coupling reactions and can be selectively removed under mild acidic conditions. The D-configuration provides resistance to proteolytic degradation. Amino acids and amino acid derivatives have been commercially used as ergogenic supplements.
ln Vitro
Commercial ergot supplements have been made from amino acids and their derivatives. They affect the release of anabolic hormones, the availability of fuel for activity, the ability to think clearly under pressure, and the prevention of muscular damage brought on by exertion. They are regarded as advantageous synergistic food ingredients [1].
This compound is not a biological agent and does not exhibit direct in vitro biological activity in a pharmacological sense. Its value lies exclusively in its chemical utility as a protected amino acid building block for constructing D-phenylalanine-containing peptides. Amino acids and amino acid derivatives have been commercially used as ergogenic supplements. Any biological activity would reside in the final deprotected peptide product synthesized using this building block, not in the protected intermediate itself.
ln Vivo
HD-Phe-OtBu.HCl is not administered in vivo as a therapeutic agent. It is a research chemical utilized as a building block in peptide synthesis. The final deprotected peptide product, not this protected intermediate, would be the subject of in vivo pharmacological testing for therapeutic efficacy and safety. The compound is for research use only and is not intended for human or veterinary therapeutic applications.
Enzyme Assay
Non-cellular enzyme/receptor binding assays are not applicable to this compound as it is not biologically active. Its use is in organic synthesis and peptide chemistry. A typical protocol involves its use as a building block in peptide synthesis, where the tert-butyl ester can be selectively removed under acidic conditions (e.g., TFA) to reveal the free carboxylic acid for coupling with other amino acids using standard coupling reagents.
Cell Assay
This compound is not used in cell-based assays as a therapeutic agent. Its applications are in synthetic chemistry and peptide synthesis. It should be stored as a powder at -20°C or below. It is a solid. Purity is typically ≥95%. The compound is soluble in common organic solvents such as DMF and DMSO. The product is for research purposes only and is not intended for human or veterinary use.
Animal Protocol
In vivo animal experiments do not involve this compound as a test article. It is a chemical intermediate used in the synthesis of peptide-based drug candidates. If a researcher synthesizes a therapeutic peptide using this building block, that final deprotected and purified peptide product would be subjected to animal testing for pharmacokinetics, efficacy, and toxicity. The protected amino acid itself is never administered to animals as a test compound.
ADME/Pharmacokinetics
Pharmacokinetic properties are not applicable to this compound as it is not a drug. It is a small molecule (MW 257.76 g/mol) with the formula C13H20ClNO2. Its properties are relevant for chemical handling and storage rather than for systemic exposure or ADME studies. The compound is not designed to be bioavailable, as the tert-butyl ester protecting group is intended to be removed during peptide synthesis to yield the final active peptide product.
Toxicity/Toxicokinetics
The toxicity of this compound is not extensively documented, as it is a research chemical not intended for human or veterinary use. As with all amino acid derivatives, standard laboratory safety precautions should be followed, including handling in a well-ventilated area with appropriate personal protective equipment (gloves, lab coat, safety glasses). The compound should be stored as a powder at -20°C or below and protected from moisture. It is not intended for diagnostic, therapeutic, or other medical applications.
References
[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-920.
Additional Infomation
HD-Phe-OtBu.HCl (D-Phenylalanine tert-butyl ester hydrochloride) is a phenylalanine derivative used as a building block in peptide synthesis. The tert-butyl ester provides acid-labile protection for the carboxylic acid, which can be removed under acidic conditions. The D-configuration provides resistance to proteolytic degradation. This compound is not a pharmaceutical and has no clinical trials or approved therapeutic status.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C13H20CLNO2
Molecular Weight
257.76
Exact Mass
257.118
CAS #
3403-25-6
PubChem CID
15942423
Appearance
White to off-white solid powder
Boiling Point
336.9ºC at 760 mmHg
Melting Point
208-211ºC
Flash Point
157.6ºC
LogP
3.4
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
3
Rotatable Bond Count
5
Heavy Atom Count
17
Complexity
227
Defined Atom Stereocenter Count
1
SMILES
CC(C)(C)OC(=O)[C@@H](CC1=CC=CC=C1)N.Cl
InChi Key
FDMCEXDXULPJPG-RFVHGSKJSA-N
InChi Code
InChI=1S/C13H19NO2.ClH/c1-13(2,3)16-12(15)11(14)9-10-7-5-4-6-8-10;/h4-8,11H,9,14H2,1-3H3;1H/t11-;/m1./s1
Chemical Name
tert-butyl (2R)-2-amino-3-phenylpropanoate;hydrochloride
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 3.8796 mL 19.3979 mL 38.7958 mL
5 mM 0.7759 mL 3.8796 mL 7.7592 mL
10 mM 0.3880 mL 1.9398 mL 3.8796 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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