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| Targets |
As a synthetic intermediate, (2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid has no specific biological target. Its role is to provide 4-aminoproline residues in peptide chains with both amino groups orthogonally protected. The Fmoc protecting group enables standard Fmoc solid-phase peptide synthesis (SPPS) workflows on the 4-amino group. The Boc protecting group on the pyrrolidine nitrogen provides orthogonal protection that can be selectively removed under acidic conditions. The compound's two chiral centers (2S,4R) provide stereochemical purity for peptide synthesis. The compound does not interact with enzymes or receptors in pharmacological assays. Its "target" is the peptide coupling reaction, where it acts as a protected amino acid donor.
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| 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].
The in vitro activity of (2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid is measured by coupling efficiency in solid-phase peptide synthesis (SPPS). Typically, it is coupled to resin-bound amine using standard Fmoc-SPPS conditions. Coupling efficiency is monitored by the Kaiser test or by quantitative HPLC. Purity is typically ≥98%. No inherent biological activity is observed as the compound is a protected amino acid derivative. |
| ln Vivo |
In vivo activity is not applicable for (2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid. The compound is not used in animals and is a research chemical for laboratory synthesis only.
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| Enzyme Assay |
The in vitro enzyme/receptor binding (non-cellular) experimental workflow for (2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid involves standard Fmoc solid-phase peptide synthesis procedures. Standard SPPS cycle: deprotect Fmoc with 20% piperidine in DMF (typically 2 × 5-10 minutes), wash with DMF, couple the compound (3 equiv.) with HATU (2.9 equiv.) and DIEA (6 equiv.) for 1-2 hours, wash, repeat. After complete assembly of the peptide sequence, the peptide is cleaved from the resin and deprotected using a cleavage cocktail containing TFA, TIS, and water (typically 95:2.5:2.5) for 2-4 hours.
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| Cell Assay |
In vitro cell-based experimental workflows are not performed on this intermediate. The final deprotected peptides may be tested in cell-based assays, but the protected compound itself is not used.
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| Animal Protocol |
In vivo animal experiments are not applicable for (2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid.
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| ADME/Pharmacokinetics |
The pharmacokinetic properties have not been characterized. The compound is not a drug. The compound is stable under recommended storage conditions.
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| Toxicity/Toxicokinetics |
The toxicological data are limited. Standard laboratory safety practices should be followed. The compound is intended for research use only.
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| References | |
| Additional Infomation |
(2S,4R)-4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid is a doubly protected proline derivative with orthogonal protecting groups. The compound enables the incorporation of 4-aminoproline residues into peptides. It is not a drug and has no clinical trials or approvals. The compound is for research use only.
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| Molecular Formula |
C25H28N2O6
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| Molecular Weight |
452.50
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| Exact Mass |
452.194
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| CAS # |
176486-63-8
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| PubChem CID |
2756135
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| Appearance |
White to off-white solid powder
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| Density |
1.3±0.1 g/cm3
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| Boiling Point |
650.2±55.0 °C at 760 mmHg
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| Melting Point |
199ºC(lit.)
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| Flash Point |
347.0±31.5 °C
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| Vapour Pressure |
0.0±2.0 mmHg at 25°C
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| Index of Refraction |
1.627
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| LogP |
3.86
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| Hydrogen Bond Donor Count |
2
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| Hydrogen Bond Acceptor Count |
6
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| Rotatable Bond Count |
7
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| Heavy Atom Count |
33
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| Complexity |
728
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| Defined Atom Stereocenter Count |
2
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| SMILES |
O(C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H])C(N1C([H])([H])[C@@]([H])(C([H])([H])[C@@]1([H])C(=O)O[H])N([H])C(=O)OC([H])([H])C1([H])C2=C([H])C([H])=C([H])C([H])=C2C2=C([H])C([H])=C([H])C([H])=C12)=O
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| InChi Key |
UPXRTVAIJMUAQR-VFNWGFHPSA-N
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| InChi Code |
InChI=1S/C25H28N2O6/c1-25(2,3)33-24(31)27-13-15(12-21(27)22(28)29)26-23(30)32-14-20-18-10-6-4-8-16(18)17-9-5-7-11-19(17)20/h4-11,15,20-21H,12-14H2,1-3H3,(H,26,30)(H,28,29)/t15-,21+/m1/s1
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| Chemical Name |
(2S,4R)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carboxylic acid
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| HS Tariff Code |
2934.99.9001
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| 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)
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| Solubility (In Vitro) |
DMSO: ~100 mg/mL (~221.0 mM; with ultrasonication)
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| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.52 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween-80 + 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 DMSO stock solution (25.0 mg/mL) to 400 μL of PEG300 and mix well; then add 50 μL of Tween-80 and mix well; finally add 450 μL of physiological saline and 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 (5.52 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 DMSO stock solution (25.0 mg/mL) to 900 μL of 20% SBE-β-CD saline and mix well. 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (5.52 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 DMSO stock solution (25.0 mg/mL) to 900 μL of corn oil and mix well.  (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.2099 mL | 11.0497 mL | 22.0994 mL | |
| 5 mM | 0.4420 mL | 2.2099 mL | 4.4199 mL | |
| 10 mM | 0.2210 mL | 1.1050 mL | 2.2099 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.
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.