Description

N,S-Bis(Trifluoroacetyl)-L-Cysteine Butyl Ester is a specialized, high-purity derivative of L-cysteine, characterized by its trifluoroacetyl protecting groups and butyl ester moiety. This compound is a critical chiral building block and derivatization agent, enabling precise chemical synthesis and analytical applications. It is primarily utilized by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and advanced materials sectors for the development of novel compounds and high-resolution analytical methods.

Application

• Pharmaceutical Intermediate: Serves as a key chiral synthon in the synthesis of complex drug candidates, particularly those containing modified cysteine or peptide backbones.
• Analytical Derivatization Reagent: Used to enhance the detectability and chromatographic separation of amino acids, peptides, and other amines in HPLC, GC, and LC-MS analysis.
• Peptide Chemistry: Employed in peptide synthesis as a protected cysteine derivative, where the trifluoroacetyl groups offer orthogonal protection strategies.
• Agrochemical Research: Acts as a precursor or intermediate in the development of novel pesticides and herbicides with specific stereochemical requirements.
• Bioconjugation & Labeling: Facilitates the site-specific modification of proteins and biomolecules for diagnostic and research purposes.
• Material Science: Used in the research and development of specialty polymers and functionalized surfaces.

Basic Information

Product Name	N,S-Bis(Trifluoroacetyl)-L-Cysteine Butyl Ester
CAS No.	5282-99-5
Molecular Formula	C11H14F6NO4S
Molecular Weight	370.29 g/mol
Synonyms	L-Cysteine, N,S-bis(trifluoroacetyl)-, butyl ester; Butyl N,S-bis(trifluoroacetyl)-L-cysteinate; N,S-Bis(trifluoroacetyl)cysteine butyl ester; BTAB; BTCB; (R)-2-(Bis(trifluoroacetamido)methyl)thio)butyl acetate; N(alpha),S-Bis(trifluoroacetyl)-L-cysteine n-butyl ester
EINECS	Contact for details

Quality Control

Our N,S-Bis(Trifluoroacetyl)-L-Cysteine Butyl Ester is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including chiral purity verification and impurity profiling by HPLC, to ensure it meets the exacting standards required for research and synthesis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and specific test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its nature as a strong acid/organic solvent derivative and potential sensitivity, keep away from heat, open flames, and incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or low-melting solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% (L-isomer)
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.