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tert-Butyl D-leucinate hydrochloride

tert-Butyl D-leucinate HCl is a leucine analogue.
tert-Butyl D-leucinate hydrochloride
tert-Butyl D-leucinate hydrochloride Chemical Structure CAS No.: 13081-32-8
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
tert-Butyl D-leucinate HCl is a leucine analogue.
tert-Butyl D-leucinate hydrochloride (CAS 13081-32-8) is a leucine derivative and protected form of D-leucine. It has a molecular formula of C₁₀H₂₂ClNO₂ and molecular weight of 223.74 g/mol. The compound features a tert-butyl ester protecting group and is supplied as the hydrochloride salt. It is used as an ergogenic supplement in research settings, influencing the secretion of anabolic hormones, fuel supply during exercise, mental performance during stress-related tasks, and helping prevent exercise-induced muscle damage. The compound serves as a key building block in the synthesis of peptides, particularly in pharmaceutical research where specific amino acid sequences are crucial for drug development. The product is for research use only.
Biological Activity I Assay Protocols (From Reference)
Targets
As an amino acid derivative, tert-Butyl D-leucinate hydrochloride does not have a defined primary drug target in the context of therapeutic development. However, as a protected form of D-leucine, it may be used in research to study amino acid metabolism, protein synthesis, and enzyme-substrate interactions. D-Leucine is a non-proteinogenic amino acid that can be incorporated into peptides to study stereospecific effects on biological activity. The compound can also serve as a substrate for enzymes involved in amino acid metabolism, such as leucine aminopeptidase or branched-chain amino acid transaminase. In peptide synthesis applications, the tert-butyl ester protects the C-terminus, allowing for selective deprotection and coupling reactions.
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].
In vitro studies on amino acid derivatives, including this leucine analogue, have demonstrated their capacity to influence the release of anabolic hormones, modulate fuel availability for cellular activity, enhance mental performance under stress-related conditions, and prevent exercise-induced muscle damage. As a leucine derivative, this compound may be used in cell-based assays to investigate amino acid transport mechanisms, protein synthesis, and the effects of leucine on mTOR signaling and cellular metabolism. The compound can also be utilized in studies examining the role of branched-chain amino acids in muscle protein synthesis.
ln Vivo
In vivo studies on amino acid derivatives have shown that 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. These compounds are regarded as advantageous synergistic food ingredients in animal models. As a leucine ester, this compound may be administered in animal studies to evaluate the effects of leucine supplementation or to study the pharmacokinetics and bioavailability of amino acid derivatives. It is also found in dietary supplements aimed at muscle recovery and growth.
Enzyme Assay
Non-cell-based enzyme or receptor binding assays for this compound typically involve enzymatic studies using purified enzymes such as leucine aminopeptidase or branched-chain amino acid transaminase. Standard protocols include incubating varying concentrations of the test compound with the enzyme source in appropriate buffer systems, followed by measurement of enzymatic activity using spectrophotometric or chromatographic detection methods. For peptide synthesis applications, the compound is evaluated in coupling reactions using standard carbodiimide-mediated chemistry to assess reactivity and coupling efficiency. The tert-butyl ester protecting group allows for selective deprotection under acidic conditions (e.g., TFA), which is a key feature in peptide synthesis workflows.
Cell Assay
Cell-based assays for this leucine derivative typically utilize mammalian cell lines to evaluate compound uptake, cytotoxicity, and effects on cellular metabolism. Standard protocols involve culturing cells in appropriate media at 37°C in 5% CO₂, followed by treatment with varying concentrations of the compound (typically 0.1-100 μM) for 24-72 hours. Cell viability is assessed using MTT or CCK-8 assays. The compound's effects on amino acid transport can be studied using radiolabeled tracer uptake assays in cultured cells. For peptide synthesis applications, the compound is used as a building block in solid-phase peptide synthesis (SPPS) protocols. The tert-butyl ester can be removed with TFA after peptide assembly.
Animal Protocol
In vivo animal studies for amino acid derivatives typically involve administration via oral gavage, intraperitoneal injection, or intravenous injection in rodent models (mice or rats). Standard protocols include dosing at ranges of 10-100 mg/kg body weight, with observations over 1-14 days depending on the study objectives. For studies evaluating the effects of leucine supplementation, animals may be administered the compound and monitored for changes in metabolic parameters, muscle protein synthesis, or cognitive function. Pharmacodynamic assessments may include blood sampling for amino acid analysis, tissue collection for histopathological examination, and monitoring of body weight and general health parameters. All animal studies must comply with institutional ethical guidelines.
ADME/Pharmacokinetics
Pharmacokinetic properties for this leucine ester can be inferred from structurally related compounds. As a small molecule (molecular weight 223.74 g/mol), it is expected to have reasonable oral bioavailability. The tert-butyl ester is likely to be hydrolyzed in vivo to release the active D-leucine. The compound shows good aqueous solubility due to the hydrochloride salt form. For in vivo administration, formulations using suitable co-solvent systems may be employed. The compound is stable at room temperature during shipping and should be stored as powder at -20°C for long-term preservation. Definitive PK parameters such as half-life, Cmax, and AUC require formal studies.
Toxicity/Toxicokinetics
Toxicological data for this specific compound are limited as it is supplied for research use only. Amino acid derivatives in general are considered to have low inherent toxicity based on their natural amino acid origins. However, as with all research chemicals, appropriate safety precautions should be observed during handling, including the use of personal protective equipment and work in well-ventilated areas. The compound may cause skin and eye irritation upon contact. Acute toxicity studies in animal models would be required to establish LD₅₀ values and no-observed-adverse-effect levels (NOAEL). For in vitro cytotoxicity assessment, the compound can be tested in mammalian cell lines using standard MTT or LDH release assays.
References

[1]. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1144.

Additional Infomation
tert-Butyl D-leucinate hydrochloride is a leucine derivative and protected form of D-leucine. It is used as an ergogenic supplement in research settings, influencing the secretion of anabolic hormones, fuel supply during exercise, mental performance during stress-related tasks, and helping prevent exercise-induced muscle damage. The compound serves as a key building block in the synthesis of peptides, particularly in pharmaceutical research where specific amino acid sequences are crucial for drug development. It is also found in dietary supplements aimed at muscle recovery and growth. It is not an approved drug and has not undergone clinical trials; it is strictly for research purposes.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C10H22CLNO2
Molecular Weight
223.74
Exact Mass
223.133
CAS #
13081-32-8
PubChem CID
44629930
Appearance
White to off-white solid powder
Index of Refraction
-19 ° (C=2, EtOH)
LogP
3.203
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
3
Rotatable Bond Count
5
Heavy Atom Count
14
Complexity
170
Defined Atom Stereocenter Count
1
SMILES
CC(C)C[C@H](C(=O)OC(C)(C)C)N.Cl
InChi Key
RFUWRXIYTQGFGA-DDWIOCJRSA-N
InChi Code
InChI=1S/C10H21NO2.ClH/c1-7(2)6-8(11)9(12)13-10(3,4)5;/h7-8H,6,11H2,1-5H3;1H/t8-;/m1./s1
Chemical Name
tert-butyl (2R)-2-amino-4-methylpentanoate;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 4.4695 mL 22.3474 mL 44.6947 mL
5 mM 0.8939 mL 4.4695 mL 8.9389 mL
10 mM 0.4469 mL 2.2347 mL 4.4695 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:

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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?
  • 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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