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Fmoc-D-Bpa-OH

Fmoc-D-Bpa-OH is a phenylalanine analogue.
Fmoc-D-Bpa-OH
Fmoc-D-Bpa-OH Chemical Structure CAS No.: 117666-97-4
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
5g
Other Sizes
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Product Description
Fmoc-D-Bpa-OH is a phenylalanine analogue.
Fmoc-D-Bpa-OH (Fmoc-D-4-benzoylphenylalanine, CAS 117666-97-4) is a phenylalanine derivative featuring a 4-benzoylphenyl side chain and an Fmoc (9-fluorenylmethyloxycarbonyl) protecting group. Its molecular formula is C31H25NO5 with a molecular weight of 491.53 g/mol. It is a D-enantiomer, meaning its side chain orientation differs from the naturally occurring L-phenylalanine. This compound is a specialized amino acid derivative utilized primarily in peptide synthesis and photoaffinity labeling. The Fmoc group provides base-labile Nα-protection, which is stable during peptide chain assembly and can be selectively removed under mild basic conditions (e.g., piperidine) during Fmoc SPPS. The D-configuration provides stereochemical precision for non-natural ligand binding pockets.
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 and photoaffinity labeling. As a phenylalanine derivative with a benzophenone photophore, it is used as a photoactivatable probe for studying biomolecular interactions and mechanisms. The benzophenone moiety serves as a photoactivatable group that, upon exposure to UV light (typically ~350-365 nm), forms covalent crosslinks with nearby C–H bonds, enabling photoaffinity labeling and protein-protein interaction mapping. The compound is fully compatible with automated Fmoc/tBu SPPS.
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 in its chemical utility as a protected amino acid building block and photoaffinity probe. Amino acids and amino acid derivatives have been commercially used as ergogenic supplements. Fmoc-D-Bpa-OH can be incorporated into peptide-based drug candidates to enhance stability, receptor binding, or pharmacokinetic properties. Any biological activity would reside in the final peptide product, not in the protected intermediate itself.
ln Vivo
Fmoc-D-Bpa-OH is not administered in vivo as a therapeutic agent. It is a research chemical utilized exclusively as a building block in peptide synthesis and photoaffinity labeling. 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 designed for biological research and industrial applications, not intended for individual clinical or medical purposes.
Enzyme Assay
Non-cellular enzyme/receptor binding assays are not applicable to Fmoc-D-Bpa-OH as a drug, but it can be used in photoaffinity labeling studies to map protein-protein interactions. A typical protocol involves incorporating Fmoc-D-Bpa-OH into a peptide via Fmoc SPPS, followed by UV irradiation (350-365 nm) to activate the benzophenone group, which forms covalent crosslinks with nearby molecules. The crosslinked products can then be analyzed by mass spectrometry or other methods to identify interaction partners. The compound achieves 63-70% covalent incorporation efficiency in receptor labeling, outperforming azido and diazirine probes.
Cell Assay
Fmoc-D-Bpa-OH is not used in cell-based assays as a therapeutic agent. Its applications are in synthetic chemistry and photoaffinity labeling. It is typically stored as a powder at -20°C. It is a solid with a molecular weight of 491.53 g/mol. Purity is typically ≥98% (HPLC). The compound is soluble in common organic solvents such as DMF and DMSO. High purity minimizes deletion sequences, reducing costly peptide re-synthesis and accelerating project timelines.
Animal Protocol
In vivo animal experiments do not involve Fmoc-D-Bpa-OH as a test article. It is a chemical intermediate used in the synthesis of peptide-based drug candidates or as a tool for studying biomolecular interactions. If a researcher synthesizes a therapeutic peptide using this building block, that final deprotected and purified peptide product would be subjected to animal testing. The Fmoc-protected amino acid itself is never administered to animals as a test compound.
ADME/Pharmacokinetics
Pharmacokinetic properties are not applicable to Fmoc-D-Bpa-OH as it is not a drug. It is a small molecule (MW 491.53 g/mol) with the formula C31H25NO5. Its properties are relevant for chemical handling and storage rather than for systemic exposure or ADME studies. The Fmoc group is base-labile and designed for synthetic utility, not for bioavailability. The compound is not designed to be bioavailable, as the Fmoc protecting group is intended to be removed during peptide synthesis.
Toxicity/Toxicokinetics
The toxicity of Fmoc-D-Bpa-OH is not extensively documented, as it is a research chemical not intended for human or veterinary use. As with all Fmoc-protected amino acids, 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):1793-960.
Additional Infomation
Fmoc-D-Bpa-OH (Fmoc-D-4-benzoylphenylalanine) is a specialized amino acid derivative utilized primarily in peptide synthesis and photoaffinity labeling. The benzophenone moiety serves as a photoactivatable group that, upon UV exposure, forms covalent crosslinks with nearby C–H bonds. The D-enantiomer configuration provides stereochemical precision for non-natural ligand binding pockets. It achieves 63-70% covalent incorporation efficiency in receptor labeling, outperforming azido and diazirine probes. 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
C31H25NO5
Molecular Weight
491.53
Exact Mass
491.173
CAS #
117666-97-4
PubChem CID
14233361
Appearance
White to off-white solid powder
Density
1.3±0.1 g/cm3
Boiling Point
729.0±60.0 °C at 760 mmHg
Flash Point
394.7±32.9 °C
Vapour Pressure
0.0±2.5 mmHg at 25°C
Index of Refraction
1.644
LogP
6.37
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
5
Rotatable Bond Count
9
Heavy Atom Count
37
Complexity
777
Defined Atom Stereocenter Count
1
SMILES
C1=CC=C(C=C1)C(=O)C2=CC=C(C=C2)C[C@H](C(=O)O)NC(=O)OCC3C4=CC=CC=C4C5=CC=CC=C35
InChi Key
SYOBJKCXNRQOGA-MUUNZHRXSA-N
InChi Code
InChI=1S/C31H25NO5/c33-29(21-8-2-1-3-9-21)22-16-14-20(15-17-22)18-28(30(34)35)32-31(36)37-19-27-25-12-6-4-10-23(25)24-11-5-7-13-26(24)27/h1-17,27-28H,18-19H2,(H,32,36)(H,34,35)/t28-/m1/s1
Chemical Name
(2R)-3-(4-benzoylphenyl)-2-(9H-fluoren-9-ylmethoxycarbonylamino)propanoic acid
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 2.0345 mL 10.1723 mL 20.3446 mL
5 mM 0.4069 mL 2.0345 mL 4.0689 mL
10 mM 0.2034 mL 1.0172 mL 2.0345 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

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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?
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  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
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  • 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)
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

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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:
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  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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  • 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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