N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(4-(tert-butoxy)-4-oxobutyl)-L-cysteine

Name: N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(4-(tert-butoxy)-4-oxobutyl)-L-cysteine
Brand: ChemScene
Availability: InStock
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CAS No. 102971-73-3
Cat. No. CS-0100981
Purity≥97%
MDL No.MFCD11226818

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
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N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(4-(tert-butoxy)-4-oxobutyl)-L-cysteine|CS-0100981

Structure of 102971-73-3

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Description

This fluorenylmethoxycarbonyl-protected cysteine derivative features a sterically hindered tert-butoxy-ketone side chain, enabling selective conjugation in peptide synthesis. The fluoren-9-ylmethoxycarbonyl group ensures efficient N-terminal protection, while the reactive thiol moiety facilitates site-specific bioconjugation under mild conditions.

Application

N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(4-(tert-butoxy)-4-oxobutyl)-L-cysteine serves as a protected cysteine building block for peptide synthesis, enabling selective side-chain functionalization. The Fmoc group provides orthogonal protection for the amine, while the tert-butyl ester and ketone functionalities allow for subsequent derivatization via reductive amination or nucleophilic addition. Bench-stable and compatible with standard coupling protocols, it facilitates efficient incorporation into complex peptide scaffolds and heterocyclic systems.

General Information

CAS No. 102971-73-3
Cat. No. CS-0100981
Purity ≥97%
MDL No. MFCD11226818
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₂₆H₃₁NO₆S
Molecular Weight 485.59
Synonym(s) None
SMILES O=C(O)[C@@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)CSCCCC(OC(C)(C)C)=O

Computational Chemistry Data

TPSA 101.93
LogP 4.8334
H_Acceptors 6
H_Donors 2
Rotatable_Bonds 10

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H302-H315-H319-H335
Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

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Other Classifications

Bioactive Molecules Peptides

Building Blocks Functional Group Fmoc

Life Science Amino Acids and their Derivatives Cysteine and derivatives

Chemical Biology Peptide Chemistry Amine Protection

Chemical Biology Peptide Chemistry Amino Acid Derivatives

Key Words

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N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(4-(tert-butoxy)-4-oxobutyl)-L-cysteine

CAS No. 102971-73-3

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