Fmoc-N-Me-Leu-OH
Based on 1 Customer Validation
Fmoc-N-Me-Leu-OH is an N-Fmoc-N-methyl amino acid that can be used in peptide coupling reactions. Fmoc-N-Me-Leu-OH is primarily used as a standard building block in solid-phase peptide synthesis (SPPS) to introduce N-methylleucine residues into peptide chains, thereby enhancing the enzymatic stability, altering conformational flexibility, and modifying the biological activity of the target peptide.
For research use only. We do not sell to patients.
- Purity: 99.72%
- CAS No.: 103478-62-2
- Formula: C22H25NO4
- Molecular Weight:367.44
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 6 months , -20°C, 1 month
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Biological Activity
Fmoc-N-Me-Leu-OH is a commonly used derivative for introducing N-methylleucine in Fmoc strategy solid-phase peptide synthesis (SPPS); this residue can be efficiently incorporated using HATU/HOBt/DIPEA or PyBOP/HOBt/DIPEA as coupling reagents; N-methylation can increase the resistance of peptides to proteases and extend their in vivo half-life[1]. Fmoc-N-Me-Leu-OH is used in the synthesis of N-methylated peptides to study the effects of N-methylation on peptide conformation, biological activity, and pharmacokinetic properties; the introduction of N-methylleucine can reduce the immunogenicity of peptides and improve membrane permeability[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 103478-62-2
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Appearance Solid
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Molecular Weight 367.44
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Formula C22H25NO4
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Color White to off-white
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SMILES
CC(C[C@H](N(C(OCC1C2=CC=CC=C2C3=CC=CC=C31)=O)C)C(O)=O)C
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Solvent & Solubility
DMSO : 100 mg/mL (272.15 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (6.80 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: 2.5 mg/mL (6.80 mM); Suspended solution; Need ultrasonic
This protocol yields a suspended solution of 2.5 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
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Data Sheet (274 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
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| DMSO | 1 mM | 2.7215 mL | 13.6077 mL | 27.2153 mL | 68.0383 mL |
| 5 mM | 0.5443 mL | 2.7215 mL | 5.4431 mL | 13.6077 mL | |
| 10 mM | 0.2722 mL | 1.3608 mL | 2.7215 mL | 6.8038 mL | |
| 15 mM | 0.1814 mL | 0.9072 mL | 1.8144 mL | 4.5359 mL | |
| 20 mM | 0.1361 mL | 0.6804 mL | 1.3608 mL | 3.4019 mL | |
| 25 mM | 0.1089 mL | 0.5443 mL | 1.0886 mL | 2.7215 mL | |
| 30 mM | 0.0907 mL | 0.4536 mL | 0.9072 mL | 2.2679 mL | |
| 40 mM | 0.0680 mL | 0.3402 mL | 0.6804 mL | 1.7010 mL | |
| 50 mM | 0.0544 mL | 0.2722 mL | 0.5443 mL | 1.3608 mL | |
| 60 mM | 0.0454 mL | 0.2268 mL | 0.4536 mL | 1.1340 mL | |
| 80 mM | 0.0340 mL | 0.1701 mL | 0.3402 mL | 0.8505 mL | |
| 100 mM | 0.0272 mL | 0.1361 mL | 0.2722 mL | 0.6804 mL |
Fmoc-N-Me-Leu-OH Related Classifications
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