Cas no 28920-43-6 ((9H-fluoren-9-yl)methyl chloroformate)

(9H-Fluoren-9-yl)methyl chloroformate (Fmoc-Cl) is a widely used reagent in peptide synthesis, particularly for the introduction of the Fmoc protecting group to amino acids. Its key advantages include high reactivity with primary and secondary amines, enabling efficient protection under mild conditions. The Fmoc group is stable to acidic conditions but readily cleaved by bases, making it ideal for orthogonal deprotection strategies in solid-phase peptide synthesis. The reagent’s crystalline form ensures consistent purity and handling precision. Fmoc-Cl is also compatible with a range of solvents, including dichloromethane and DMF, facilitating versatile application in complex synthetic workflows. Its reliability and selectivity make it a staple in modern peptide chemistry.
(9H-fluoren-9-yl)methyl chloroformate structure
28920-43-6 structure
Product Name:(9H-fluoren-9-yl)methyl chloroformate
CAS No:28920-43-6
MF:C15H11ClO2
MW:258.699643373489
MDL:MFCD00001138
CID:53395
PubChem ID:24853861
Update Time:2026-04-28

(9H-fluoren-9-yl)methyl chloroformate Chemical and Physical Properties

Names and Identifiers

    • 9-Fluorenylmethyl chloroformate
    • 9-Fluorenylmethyloxycarbonylchloride
    • FMOC-chloride
    • Fmoc-Cl
    • Chloroformic acid 9-fluorenylmethyl ester
    • 9-Fluorenylmethoxycarbonyl
    • 9-Fluorenylmethyl Chloroformate [N-Protecting Agent for Peptides Research]
    • Fmoc chloride
    • FmocCl
    • (9H-Fluoren-9-yl)methyl chloroformate
    • 9-Fluorenylmethyl Chlorocarbonate
    • 9-Fluorenylmethyl chloroformat
    • 9H-fluoren-9-ylmethyl carbonochloridate
    • Carbonochloridic acid, 9H-fluoren-9-ylmethyl ester
    • Fmco-chloride(9-Fluorenyl methyl chloroformate)
    • Fmoc-Cl (9-Fluorenylmethoxycarbonyl chloride)
    • Fmoc-CL Chloroformic acid 9-fluorenylmethyl ester
    • (9H-Fluoren-9-ylmethoxy)carbonyl Chloride
    • 9-Fluorenylmethoxycarbonyl chloride
    • 9-Fluorenylmethoxycarbonyl chloride,9-Fluorenylmethyl chloroformate,Fmoc-Cl
    • 9H-Fluo
    • Fluoren-9-ylmethyl chloroformate
    • Fmoc chloroformate
    • 9H-Fluoren-9-ylmethyl chloroformate
    • FMOC-CI
    • (9h-fluoren-9-yl)methyl carbonochloridate
    • 1-(9-Fluorenyl)methyl chloroformate
    • 9-fluorenylmethylchloroformate
    • CCR
    • NS00028578
    • Fmoc chloride, BioReagent, >=99.0% (HPLC)
    • Fmoc chloride, 97%
    • Fmoc-Cl (9-Fluorenylmethyl chloroformate)
    • EINECS 249-313-6
    • AM20040102
    • F0197
    • FT-0621660
    • FMOC-Cl?Chloroformic acid 9-fluorenylmethyl ester
    • C93459
    • 9H-fluoren-9-ylmethylcarbonochloridate
    • 28920-43-6
    • DTXSID10183116
    • 9-fluoreneylmethyl chloroformate
    • EN300-37269
    • 9-fluorenylmethoxycarbonyl-chloride
    • Fmoc chloride, for HPLC derivatization, >=99.0% (HPLC)
    • Fmoc chloride, purum, >=98.0% (HPLC)
    • 9PLB0BTT90
    • AC-24425
    • Q827647
    • STR02408
    • BP-21051
    • SCHEMBL27547
    • 9-fluorenylmethyl chlorformate
    • UNII-9PLB0BTT90
    • AKOS009157869
    • 9-FLUORENYLMETHYL CHLOROFORMATE [MI]
    • 9-fluorenemethyl chloroformate
    • 9-fluorenylmethyloxycarbonyl chloride
    • F0001-0905
    • FORMIC ACID, CHLORO-, FLUOREN-9-YLMETHYL ESTER
    • 9-Fluorenylmethyl chloroformate; Chloroformic acid 9-fluorenylmethyl ester
    • BRN 2279177
    • Carbonochloridic acid 9H-fluoren-9-ylmethyl ester
    • 9-flourenylmethyl chloroformate
    • CCRIS 2608
    • 9H-Fluoren-9-ylmethyl chloridocarbonate #
    • 9-Fluorenyl-methyloxycarbonyl chloride
    • Q-101295
    • (9H-fluoren-9-yl)methylcarbonochloridate
    • 9-Fluorenylmethyoxycarbonyl chloride
    • 9-fluorenylmethyl-chloroformate
    • MFCD00001138
    • 9-Fluorenylmethyl Chloroformate [N-Protecting Agent for Peptides Research]
    • DB-004014
    • DTXCID20105607
    • 9-FLMC
    • Fmoc-Cl;9-Fluorenylmethoxycarbonyl-chloride; Fmoc-chloride
    • (9H-fluoren-9-yl)methyl chloroformate
    • MDL: MFCD00001138
    • Inchi: 1S/C15H11ClO2/c16-15(17)18-9-14-12-7-3-1-5-10(12)11-6-2-4-8-13(11)14/h1-8,14H,9H2
    • InChI Key: IRXSLJNXXZKURP-UHFFFAOYSA-N
    • SMILES: ClC(=O)OCC1C2C=CC=CC=2C2C=CC=CC1=2
    • BRN: 2279177

Computed Properties

  • Exact Mass: 258.04500
  • Monoisotopic Mass: 258.044757
  • Isotope Atom Count: 0
  • Hydrogen Bond Donor Count: 0
  • Hydrogen Bond Acceptor Count: 2
  • Heavy Atom Count: 18
  • Rotatable Bond Count: 3
  • Complexity: 296
  • Covalently-Bonded Unit Count: 1
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count : 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Surface Charge: 0
  • Tautomer Count: nothing
  • XLogP3: 4.3
  • Topological Polar Surface Area: 26.3

Experimental Properties

  • Color/Form: White crystals
  • Density: 1.1780 (rough estimate)
  • Melting Point: 61.0 to 65.0 deg-C
  • Boiling Point: 365.79°C (rough estimate)
  • Flash Point: 143.6±11.4 °C
  • Refractive Index: 1.5330 (estimate)
  • Solubility: dioxane: 0.1?g/mL, clear, colorless
  • PSA: 26.30000
  • LogP: 4.17430
  • Sensitiveness: Moisture Sensitive
  • Solubility: Insoluble in water, soluble in organic solvents.

(9H-fluoren-9-yl)methyl chloroformate Security Information

  • Symbol: GHS05
  • Prompt:dangerous
  • Signal Word:Danger
  • Hazard Statement: H314
  • Warning Statement: P280,P305+P351+P338,P310
  • Hazardous Material transportation number:UN 3261 8/PG 2
  • WGK Germany:3
  • Hazard Category Code: 34
  • Safety Instruction: S26-S36/37/39-S45
  • FLUKA BRAND F CODES:10-21
  • RTECS:LQ6250000
  • Hazardous Material Identification: C
  • HazardClass:8
  • PackingGroup:II
  • Storage Condition:2-8°C
  • Packing Group:II
  • Hazard Level:6.1
  • Safety Term:6.1
  • Packing Group:II
  • Risk Phrases:R20/21/22; R34

(9H-fluoren-9-yl)methyl chloroformate Customs Data

  • HS CODE:29159020
  • Customs Data:

    China Customs Code:

    2915900090

    Overview:

    2915900090. Other saturated acyclic monocarboxylic acids and their anhydrides(Acyl halide\Peroxygenation)Chemicals\Peroxy acid and its halogenation\nitrification\sulfonation\Nitrosative derivative. VAT:17.0%. Tax refund rate:9.0%. Regulatory conditions:AB(Customs clearance form for Inbound Goods,Customs clearance form for outbound goods). MFN tariff:5.5%. general tariff:30.0%

    Declaration elements:

    Product Name, component content, use to

    Regulatory conditions:

    A.Customs clearance form for Inbound Goods
    B.Customs clearance form for outbound goods

    Inspection and quarantine category:

    R.Sanitary supervision and inspection of imported food
    S.Sanitary supervision and inspection of exported food
    M.Import commodity inspection
    N.Export commodity inspection

    Summary:

    2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0%

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(9H-fluoren-9-yl)methyl chloroformate Suppliers

Suzhou Senfeida Chemical Co., Ltd
Gold Member
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(CAS:28920-43-6)9-Fluorenylmethyl chloroformate
Order Number:sfd16079
Stock Status:in Stock
Quantity:200kg
Purity:99.9%
Pricing Information Last Updated:Friday, 19 July 2024 14:37
Price ($):discuss personally
Tiancheng Chemical (Jiangsu) Co., Ltd
Gold Member
Audited Supplier Audited Supplier
(CAS:28920-43-6)9-Fluorenylmethyl chloroformate
Order Number:LE7384;LE1754372
Stock Status:in Stock
Quantity:25KG,200KG,1000KG
Purity:99%
Pricing Information Last Updated:Friday, 20 June 2025 11:57
Price ($):discuss personally

(9H-fluoren-9-yl)methyl chloroformate Spectrogram

13C NMR
13C NMR
GC-MS
GC-MS
1H NMR 300 MHz DMSO
1H NMR

(9H-fluoren-9-yl)methyl chloroformate Related Literature

Additional information on (9H-fluoren-9-yl)methyl chloroformate

Introduction to (9H-fluoren-9-yl)methyl chloroformate (CAS No. 28920-43-6)

(9H-fluoren-9-yl)methyl chloroformate is a specialized organic compound that has garnered significant attention in the field of pharmaceutical and chemical research. This compound, identified by its CAS number 28920-43-6, is a key intermediate in the synthesis of various bioactive molecules. Its unique structural properties make it particularly valuable in the development of novel therapeutic agents and fine chemicals. The presence of a fluorene moiety and a chloroformate functional group imparts distinct reactivity, enabling its use in diverse chemical transformations.

The fluorene ring, a polycyclic aromatic hydrocarbon, is known for its stability and electronic characteristics, which contribute to the compound's utility in synthetic chemistry. Specifically, the fluorene core provides a rigid scaffold that can be modified post-synthetically, allowing for the introduction of various functional groups. This flexibility is crucial in drug design, where specific molecular interactions are often required for efficacy. The chloroformate group, on the other hand, is a versatile reagent that participates in nucleophilic substitution reactions, making it an excellent tool for introducing ester functionalities into target molecules.

In recent years, (9H-fluoren-9-yl)methyl chloroformate has been employed in the synthesis of a range of pharmacologically relevant compounds. For instance, its use in the preparation of protease inhibitors has been explored due to its ability to form stable amide bonds with nucleophilic amino groups. This property is particularly valuable in the development of antiviral and anticancer agents, where protease inhibition plays a critical role. Additionally, the compound has been utilized in the synthesis of kinase inhibitors, which are essential in targeted cancer therapies.

The importance of this compound is further underscored by its application in medicinal chemistry research. Researchers have leveraged its reactivity to develop novel scaffolds for drug discovery programs. The fluorene moiety serves as an anchor point for further derivatization, allowing chemists to explore a wide array of structural modifications. This adaptability has led to the identification of several lead compounds with promising biological activity. For example, derivatives of (9H-fluoren-9-yl)methyl chloroformate have shown inhibitory effects against various enzymes implicated in inflammatory diseases.

From a synthetic chemistry perspective, (9H-fluoren-9-yl)methyl chloroformate offers several advantages over alternative reagents. Its high reactivity and compatibility with a broad range of substrates make it a preferred choice for many synthetic protocols. Moreover, its stability under various reaction conditions ensures consistent yields and purity profiles, which are critical for industrial applications. These attributes have made it a staple in many pharmaceutical research laboratories.

The compound's role extends beyond academic research; it has found practical applications in industrial settings as well. For instance, it is used in the production of specialty chemicals that require precise functionalization. Its ability to introduce ester groups efficiently makes it valuable in the synthesis of polymers and coatings that exhibit enhanced performance characteristics. This versatility underscores its significance across multiple sectors of the chemical industry.

Recent advancements in synthetic methodologies have further highlighted the utility of (9H-fluoren-9-yl)methyl chloroformate. Techniques such as flow chemistry and microwave-assisted synthesis have been employed to improve reaction efficiency and scalability. These innovations have not only accelerated the synthesis process but also enabled the production of complex derivatives under milder conditions. Such developments are particularly important for reducing costs and minimizing environmental impact.

The compound's potential extends into emerging fields such as materials science and nanotechnology. Researchers are exploring its use in the development of organic electronic materials due to its electron-deficient nature and ability to form stable conjugated systems. Additionally, its incorporation into nanomaterials has shown promise in enhancing luminescent properties for applications in sensors and imaging technologies.

In summary, (9H-fluoren-9-yl)methyl chloroformate (CAS No. 28920-43-6) is a multifaceted compound with significant applications across pharmaceuticals, materials science, and industrial chemistry. Its unique structural features and reactivity make it an indispensable tool for researchers seeking to develop novel bioactive molecules and advanced materials. As synthetic chemistry continues to evolve, this compound will undoubtedly remain at the forefront of innovation.

Recommended suppliers
Suzhou Senfeida Chemical Co., Ltd
(CAS:28920-43-6)9-Fluorenylmethyl chloroformate
sfd16079
Purity:99.9%
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Price ($):Inquiry
Email
Tiancheng Chemical (Jiangsu) Co., Ltd
(CAS:28920-43-6)9-Fluorenylmethyl chloroformate
LE7384;LE1754372
Purity:99%/99%
Quantity:25KG,200KG,1000KG/25KG,200KG,1000KG
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Email