(S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid

Name: (S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 203854-59-5
Cat. No. CS-0095468
Purity≥97%
MDL No.MFCD07372881

HazMat Fee +

HazMat Fee

An item is classified as a dangerous good if our website displays Hazardous Material (HazMat) information for it. There is a HazMat shipping fee for each item that qualifies as a dangerous good, except in the following scenarios:

The shipment is processed through FedEx Ground under the Limited Quantity option.

Each bottle is packed as an Excepted Quantity, with a maximum of 1g for items in class 6.1 packing group I or II, and up to 25g for all other hazardous materials.

If shipping is charged to your FedEx account, the HazMat fee will be billed directly by the courier. Otherwise, the fee will be included on your invoice. To help you avoid the HazMat fee, we can package a 5g order of a class 6.1 packing group I or II material as five separate 1g units, and a 100g order of any other dangerous good as four 25g units. This packaging adjustment will be made unless you instruct otherwise on your purchase order. Below, you will find the fee schedule from FedEx for handling hazardous materials.

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+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

An item is classified as a dangerous good if our website displays Hazardous Material (HazMat) information for it.

There is a HazMat shipping fee for each item that qualifies as a dangerous good. Please contact our quotation team via email to confirm the details.

*For research and further manufacturing use only, not for direct human use.

(S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid|CS-0095468

Structure of 203854-59-5

Size

Price

Quantity

* Please select Quantity before adding items.

Description

(S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid is a chiral, bench-stable amino acid derivative featuring a fluorenylmethoxycarbonyl (Fmoc) protecting group. This moiety enables efficient incorporation into peptide chains under mild coupling conditions. The side chain bears a tertiary methyl substituent, providing steric differentiation at the β-position. The compound serves as a key building block for solid-phase peptide synthesis, where its solubility and compatibility streamline sequence assembly.

Application

(S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid serves as a robust chiral building block for peptide synthesis, offering high stereoselectivity and bench stability. The Fmoc group enables efficient, orthogonal protection of the amine, while the branched aliphatic side chain provides steric definition and compatibility with standard coupling protocols. Its structure facilitates clean deprotection and purification, making it well-suited for iterative solid-phase and solution-phase peptide assembly.

General Information

CAS No. 203854-59-5
Cat. No. CS-0095468
Purity ≥97%
MDL No. MFCD07372881
Storage Store at room temperature
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₂₁H₂₃NO₄
Molecular Weight 353.41
Synonym(s) FMoc-(S)-2-(aMinoMethyl)-3-Methylbutanoic acid
SMILES CC(C)[C@@H](CNC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)C(O)=O

Computational Chemistry Data

TPSA 75.63
LogP 3.8819
H_Acceptors 3
H_Donors 2
Rotatable_Bonds 6

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

Quality Control

To search for quality control of cas , please enter both the product number and the lot/batch number.

Other Classifications

Building Blocks Functional Group Amine

Building Blocks Functional Group Carboxylic Acid

Building Blocks Skeleton Aromatic ring compounds Benzene compounds

Building Blocks Skeleton Chiral compounds Chiral Building Blocks

Key Words

203854-59-5 sigma203854-59-5 manufacturer203854-59-5 price203854-59-5 structure203854-59-5 SDSbuy 203854-59-5203854-59-5 supplier203854-59-5 uses203854-59-5 molecular weightprice of 203854-59-5203854-59-5 chemical name formula of 203854-59-5

Salutation:	*Country or Region:
*Applicant Name:	*Organization Name:
*Email Address:	Quantity:
CAS NO. :	Product Name:
Remarks:
Upload Pictures

CAS.No.		Product Name
Applicant Name *		Email Address *
Phone Number *		Organization Name*
Country or Region*		Quantity*
Remarks:

Product Name:
Cat. No.: .		CAS NO. :
Quantity:

(S)-2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-3-methylbutanoic acid

CAS No. 203854-59-5

Recommended Products