9-Fluorenylmethyl Chloroformate (CAS 28920-43-6) User Guide
Table of Contents
1. Product Overview & Specifications
9-Fluorenylmethyl Chloroformate (Fmoc-Cl) is a critical reagent in peptide synthesis and analytical chemistry. Key parameters include:
| Parameter | Details |
|---|---|
| CAS Number | 28920-43-6 |
| Molecular Formula | C15H11ClO2 |
| Molecular Weight | 258.7 g/mol |
| Appearance | White to off-white crystalline powder |
| Purity | ≥98% |
| Melting Point | 60–63°C |
| Storage | 2–8°C, protected from moisture |
Comparison with Other Protecting Agents
| Agent | Stability | Deprotection Method |
|---|---|---|
| Fmoc-Cl | Base-sensitive | Piperidine/DMF |
| Boc | Acid-sensitive | TFA |
| Cbz | Hydrogenation | H2/Pd |
2. Key Applications
- Peptide Synthesis: Protects amino groups during solid-phase peptide synthesis (SPPS) to create N-Fmoc amino acids.
- Analytical Chemistry: Derivatizes amino acids for enhanced HPLC and capillary electrophoresis detection sensitivity.
- Oligonucleotide Synthesis: Serves as a temporary protecting group in phosphoramidite-based DNA/RNA synthesis.
- Pharmaceutical Research: Synthesizes bicyclic proline analogs and other bioactive molecules.
3. Usage Scenarios
Example 1: Fmoc Protection in Peptide Synthesis
Step 1: Dissolve 1 eq. of amino acid in anhydrous DMF.
Step 2: Add 1.2 eq. Fmoc-Cl and 2 eq. NaHCO3.
Step 3: Stir at 25°C for 4 hours. Monitor by TLC.
Step 4: Purify via precipitation or column chromatography.
Example 2: Amino Acid Derivatization for HPLC
Mix 10 µL sample with 20 µL Fmoc-Cl (1% in acetonitrile) and 5 µL borate buffer (pH 8.5). Incubate at 40°C for 15 min. Analyze using a C18 column with UV detection at 265 nm.
4. Customer Case Studies
Case 1: PharmaSynth Co., Ltd.
Challenge: Low yield in SPPS due to incomplete amino protection.
Solution: Switched to Fmoc-Cl (98% purity) with optimized reaction conditions.
Result: 22% increase in peptide yield and reduced side products.
Case 2: BioAnalytix Research Institute
Challenge: Poor amino acid detection limits in urine samples.
Solution: Implemented Fmoc-Cl derivatization for LC-MS analysis.
Result: Achieved 0.1 ng/mL sensitivity for glutamine quantification.
5. Contact for Inquiries
For pricing, bulk orders, or technical support:
Email: info@vivalr.com
Tel: (86) 15866781826
Why Choose Us?
• ISO-certified production
• 24-hour shipment guarantee
• Third-party quality validation available



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