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N-Boc-L-tert-Leucine

Cat No.:V67847 Purity: ≥98%
N-Boc-L-tert-Leucine is a leucine analogue.
N-Boc-L-tert-Leucine
N-Boc-L-tert-Leucine Chemical Structure CAS No.: 62965-35-9
Product category: Amino Acid Derivatives
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
N-Boc-L-tert-Leucine is a leucine analogue.
N-Boc-L-tert-Leucine (CAS 62965-35-9), also known as Boc-L-tert-leucine or (S)-2-((tert-butoxycarbonyl)amino)-3,3-dimethylbutanoic acid, is a leucine analogue featuring a tert-butyloxycarbonyl (Boc) protecting group on the amino functionality. It has a molecular formula of C₁₁H₂₁NO₄ and a molecular weight of 231.29 g/mol. The compound is a non-proteinogenic, Boc-protected L-amino acid derivative. It is commonly used as a building block in the synthesis of peptides and peptidomimetics. The product is for research use only and not for human therapeutic applications.
Biological Activity I Assay Protocols (From Reference)
Targets
As an amino acid derivative, N-Boc-L-tert-Leucine does not have a defined primary drug target in the context of therapeutic development. However, as a protected tert-leucine analogue, it may be used in research to study peptide conformation, receptor binding, and enzyme-substrate interactions. tert-Leucine is a non-proteinogenic amino acid with a bulky tert-butyl side chain that can introduce significant steric hindrance and conformational constraints. The Boc protecting group allows for selective deprotection under acidic conditions, which is a key feature in Boc-based SPPS. The compound can serve as a building block for synthesizing tert-leucine-containing peptides for studying structure-activity relationships.
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 tert-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 tert-leucine derivative, this compound may be used in cell-based assays to investigate amino acid transport mechanisms, peptide stability, and the effects of steric hindrance on peptide biological activity. The compound can also be utilized in studies examining the role of conformational constraints in peptide-receptor interactions and enzyme recognition.
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. As a protected tert-leucine derivative, this compound may be administered in animal studies to evaluate the effects of sterically hindered amino acids on biological systems. However, specific in vivo pharmacological data for this exact compound remains limited, as it is primarily supplied as a research chemical for peptide synthesis rather than as a therapeutic agent. The Boc group would likely be cleaved in vivo to release tert-leucine.
Enzyme Assay
Non-cell-based enzyme or receptor binding assays for this compound typically involve studies with purified enzymes or receptors to evaluate the effects of tert-butyl substitution on binding affinity and enzymatic activity. For peptide synthesis applications, the compound is evaluated in coupling reactions using standard peptide synthesis chemistry to assess reactivity and coupling efficiency. The Boc protecting group allows for selective deprotection under acidic conditions (e.g., TFA). The sterically hindered nature of the compound may affect coupling reaction kinetics.
Cell Assay
Cell-based assays for this tert-leucine derivative typically utilize mammalian cell lines to evaluate compound uptake, cytotoxicity, and effects on cellular signaling. 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. For peptide synthesis applications, the compound is used as a building block in Boc-based SPPS protocols for introducing tert-leucine residues into peptide sequences. The Boc group is removed with TFA after coupling to allow for chain elongation.
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 tert-leucine-containing peptides, animals may be administered peptide formulations and monitored for therapeutic efficacy or pharmacokinetics. Pharmacodynamic assessments may include blood sampling for peptide analysis, tissue collection for histopathological examination, and monitoring of body weight. All animal studies must comply with institutional ethical guidelines.
ADME/Pharmacokinetics
Pharmacokinetic properties for this Boc-protected tert-leucine derivative can be inferred from structurally related compounds. As a small molecule (molecular weight 231.29 g/mol), it is expected to have reasonable oral bioavailability. The Boc protecting group is likely to be cleaved in vivo to release the active tert-leucine. The compound shows moderate solubility in organic solvents such as DMSO and can be formulated for in vitro studies. For in vivo administration, formulations using suitable co-solvent systems may be employed. The compound should be stored as powder at -20°C for long-term preservation. Definitive PK parameters require formal studies.
Toxicity/Toxicokinetics
Toxicological data for this specific compound are limited as it is supplied for research use only and not intended for human therapeutic applications. 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.
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
(S)-2-((tert-Butoxycarbonyl)amino)-3,3-dimethylbutanoic acid is a derivative of leucine.
N-Boc-L-tert-Leucine is a non-proteinogenic, Boc-protected L-amino acid derivative. tert-Leucine has a bulky tert-butyl side chain that can introduce significant steric hindrance and conformational constraints. This compound is commonly used as a building block in the synthesis of peptides and peptidomimetics. 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
C11H21NO4
Molecular Weight
231.28874
Exact Mass
231.147
CAS #
62965-35-9
PubChem CID
2734668
Appearance
White to off-white solid powder
Density
1.1±0.1 g/cm3
Boiling Point
350.0±25.0 °C at 760 mmHg
Melting Point
118-121 °C
Flash Point
165.5±23.2 °C
Vapour Pressure
0.0±1.6 mmHg at 25°C
Index of Refraction
1.462
LogP
2.3
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
4
Rotatable Bond Count
5
Heavy Atom Count
16
Complexity
273
Defined Atom Stereocenter Count
1
SMILES
CC(C)(C)[C@@H](C(=O)O)NC(=O)OC(C)(C)C
InChi Key
LRFZIPCTFBPFLX-SSDOTTSWSA-N
InChi Code
InChI=1S/C11H21NO4/c1-10(2,3)7(8(13)14)12-9(15)16-11(4,5)6/h7H,1-6H3,(H,12,15)(H,13,14)/t7-/m1/s1
Chemical Name
(2S)-3,3-dimethyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic 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)
DMSO: 100 mg/mL (432.36 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (10.81 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (10.81 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
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.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (10.81 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 4.3236 mL 21.6179 mL 43.2358 mL
5 mM 0.8647 mL 4.3236 mL 8.6472 mL
10 mM 0.4324 mL 2.1618 mL 4.3236 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.

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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)
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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)
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  • 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

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
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
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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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