Boc-methioninethiol acetate (CAS 139429-04-2) is a specialized Boc-protected amino acid derivative featuring a thioacetate functionality. The molecule incorporates a tert-butyloxycarbonyl (Boc) protecting group on the amino moiety, combined with a methionine-derived thiol framework that has been acetylated to form the thioacetate (S-acetyl) derivative.
Boc-methioninethiol acetate is a specialized building block for peptide and medicinal chemistry, combining Boc-protected amino functionality with a thioacetate-protected thiol. As a derivative of methionine, Boc-methioninethiol acetate provides access to thiol-containing methionine analogs that are valuable for introducing sulfur-based functionalities into peptides, peptide-drug conjugates, and other bioactive molecules. The thioacetate protecting group on Boc-methioninethiol acetate can be selectively deprotected under mild conditions (e.g., with hydroxylamine or aqueous base) to generate the free thiol, which is then available for disulfide bond formation, conjugation to maleimide-functionalized molecules, or other thiol-specific transformations. Boc-methioninethiol acetate is employed in the synthesis of peptide analogs, disulfide-containing cyclic peptides, and sulfur-containing pharmaceutical intermediates.
Product Parameters
Parameter
Specification
Product Name
Boc-methioninethiol acetate
CAS Number
139429-04-2
Molecular Formula
C₁₂H₂₃NO₃S₂
Molecular Weight
293.44 g/mol
Storage Condition
Store at low temperature, protected from moisture
Density
1.109±0.06
Boiling Point
410.0±40.0℃
pKa
11.70±0.46
Product Advantages
Thioacetate-Protected Thiol for Selective Conjugation
The thioacetate group in Boc-methioninethiol acetate provides a stable, selectively deprotectable thiol protecting group. Deprotection under mild conditions (e.g., hydroxylamine or aqueous base) generates the free thiol for subsequent conjugation or disulfide formation.
Orthogonal Boc Protection
The tert-butyloxycarbonyl (Boc) group provides orthogonal protection for the amino functionality, enabling selective deprotection strategies in complex peptide and conjugate synthesis.
Methionine-Derived Scaffold for Sulfur Chemistry
Boc-methioninethiol acetate provides access to methionine-derived thiol functionalities that are valuable for introducing sulfur-based crosslinks, disulfide bonds, and conjugations into peptides and bioactive molecules.
Versatile Building Block for Peptide and Conjugate Synthesis
Boc-methioninethiol acetate is employed in the synthesis of peptide analogs, disulfide-containing cyclic peptides, peptide-drug conjugates, and other sulfur-containing pharmaceutical intermediates.
FAQ
Q1: What is Boc-methioninethiol acetate?
A: Boc-methioninethiol acetate (CAS 139429-04-2) is a Boc-protected amino acid derivative featuring a thioacetate (S-acetyl) functionality. It is used as a building block for introducing methionine-derived thiol functionalities into peptides and conjugates.
Q2: What is the primary application of Boc-methioninethiol acetate?
A: Boc-methioninethiol acetate is primarily used as a synthetic intermediate in peptide synthesis, medicinal chemistry, and conjugate development for introducing thiol functionalities that can be used for disulfide formation or conjugation.
Application Scenarios
Peptide Synthesis
Boc-methioninethiol acetate is used as a building block for introducing methionine-derived thiol functionalities into synthetic peptides.
Disulfide-Containing Peptide Synthesis
The thioacetate group enables the introduction of thiols for disulfide bond formation in cyclic peptides and other constrained peptides.
Peptide-Drug Conjugate Development
Used for introducing thiol handles that enable conjugation to drug molecules, linkers, or targeting moieties via maleimide-thiol chemistry.
Medicinal Chemistry Research
Employed in drug discovery programs for the synthesis of sulfur-containing peptide analogs and bioactive molecules.
Chemical Biology
Utilized for the preparation of thiol-containing probes and tools for studying biological systems.
Process Development
Used in the development of scalable synthetic routes for sulfur-containing pharmaceutical intermediates.
Contact Us
Interested in Boc-methioninethiol acetate for your peptide or conjugate synthesis project? Cosperpharm is your partner for specialized Boc-protected amino acid derivatives. Contact our team today for pricing, availability, or technical questions — we look forward to supporting your research.
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