The field of peptide chemistry relies heavily on precisely engineered building blocks that facilitate the controlled assembly of amino acid sequences. Fmoc-D-Cys(Trt)-OPfp is a prime example of such a critical component, underpinning advancements in drug discovery and biochemical research. As a leading manufacturer and supplier of specialized organic reagents, NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing scientists with the tools they need for successful peptide synthesis.

At its core, Fmoc-D-Cys(Trt)-OPfp (CAS: 200395-72-8) is a protected D-cysteine derivative. The 'Fmoc' designation refers to the 9-fluorenylmethoxycarbonyl group, a widely adopted amine protecting group in Solid Phase Peptide Synthesis (SPPS). Its key advantage is its base lability; it can be easily removed using mild organic bases like piperidine, a stark contrast to the harsher acidic conditions required for the older Boc (t-butyloxycarbonyl) protection strategy. This milder deprotection step is crucial for preserving the integrity of sensitive peptide sequences and side-chain modifications.

The 'D-Cys' component signifies that it is the D-enantiomer of cysteine, an amino acid important for incorporating specific stereochemistry into peptides. The '(Trt)' signifies the trityl (triphenylmethyl) group attached to the thiol side chain of cysteine. This S-trityl protection is vital. The thiol group of cysteine is nucleophilic and prone to side reactions, particularly the formation of disulfide bonds, during peptide synthesis. The bulky trityl group effectively shields this thiol, ensuring it does not interfere with peptide bond formation. Critically, the trityl group is acid-labile, meaning it can be selectively removed under acidic conditions that do not affect the Fmoc group or the peptide bonds themselves. This orthogonality is a cornerstone of Fmoc-based SPPS.

The 'OPfp' suffix denotes the pentafluorophenyl ester, an activated form of the carboxylic acid group. This activation significantly enhances the reactivity of the carboxyl group, making it more susceptible to nucleophilic attack by the free amine of the peptide chain attached to the resin. This rapid and efficient coupling is essential for high yields in SPPS. When researchers look to buy this reagent, they are seeking a product that integrates these protective and activating features seamlessly.

NINGBO INNO PHARMCHEM CO.,LTD. understands these intricate chemical requirements. As a dedicated supplier, we ensure that our Fmoc-D-Cys(Trt)-OPfp is synthesized with precision, resulting in a high-purity product that guarantees optimal performance in your peptide synthesis endeavors. Our competitive price and commitment to consistent quality make us a trusted partner for academic institutions and pharmaceutical companies worldwide. We invite you to inquire about our offerings and experience the reliability of our synthetic intermediates.