C19H15NO5
337.3 g/mol
Pharmaceutical IntermediateWarning
N-(9-Fluorenylmethoxycarbonyloxy)succinimide
CAS82911-69-1EC433-520-5
Category
Pharmaceutical Intermediate
Compound Class
Ester
Primary Use
Pharmaceutical Intermediate
N-(9-Fluorenylmethoxycarbonyloxy)succinimide is a chemical reagent used as a precursor in the preparation of Fmoc-amino acids for peptide synthesis.
preparation of Fmoc-amino acids
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Reading
HATU, HBTU and T3P: How Three Peptide Coupling Reagents Actually Differ — Mechanism, Epimerization, and Handling
HATU, HBTU and T3P dominate peptide and pharma amide-bond formation, but they differ in reactivity, epimerization, workup and — critically — regulatory status. Grounded in the El-Faham & Albericio review and the ACS GCIPR safety assessment, this article sets out how the three reagents actually differ, why HATU couples cleaner than HBTU, and why T3P is a CWC Schedule 2 controlled chemical while HATU and HBTU are not.
Read moreWhy Can a Molecule of Just ~31 Amino Acids Reshape Modern Pharma? Reading the Next Blockbuster Through the Chemical Design of Semaglutide
GLP-1 began as one incretin hormone in a physiology textbook; today nearly every major pharma runs a GLP-1 program. Reading the industry through the chemistry of semaglutide: why native GLP-1 (~2-minute half-life) is undruggable, how an Aib substitution + a C18 albumin-binding fatty chain turned it into a once-weekly drug, why ~31 amino acids sits near the edge of SPPS, and why the real moat is process + qualification + supply chain, not the formula. Every key number cited to a primary source. Not medical advice.
Read moreSafety Reference
Warning
H302Harmful if swallowed
H317May cause an allergic skin reaction
H411Toxic to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for N-(9-Fluorenylmethoxycarbonyloxy)succinimide (CAS 82911-69-1) is 2928.00.
HS code (international, 6-digit)
2928.00
EU CN code (8-digit)
2928 00 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(2,5-dioxopyrrolidin-1-yl) 9H-fluoren-9-ylmethyl carbonate
InChIKey
WMSUFWLPZLCIHP-UHFFFAOYSA-N
SMILES
C1CC(=O)N(C1=O)OC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24
Synonyms (24)
- Fmoc-OSu
- Fmoc-onsu
- N-(Fmoc-oxy)succinimide
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