D-Alanine benzyl ester tosylate is a D-configured amino acid ester derivative in which the alanine α-amino functionality is masked and the carboxyl group is converted to a benzyl ester, yielding a protected, esterified alanine building block. The molecule contains a benzyl ester moiety and a tosylate (tosyl) group associated with the ester-protected amino functionality, providing steric and electronic protection that can suppress undesired side reactions during stepwise assembly of peptide-related intermediates. In peptide synthesis and related solution- or solid-phase workflows, this compound is used as a chemically protected alanine precursor to introduce the D-alanine residue while maintaining controlled chemoselectivity for subsequent deprotection and coupling steps.
D-Alanine benzyl ester tosylate is a D-configured alanine derivative in which the amino functionality is converted to a tosyl-protected amine and the carboxyl group is masked as a benzyl ester. The molecule therefore presents a stereogenic carbon at the alanine backbone, a benzylic ester that can be cleaved under hydrogenolysis, and a sulfonamide tosyl group that modulates nucleophilicity and directs chemoselective transformations. The combination of a protected amine and an esterified acid provides a stable chiral intermediate for peptide building block preparation and for downstream functional group interconversions. The tosylate counterion and sulfonamide functionality also influence solubility and reactivity in organic synthesis, supporting controlled activation and coupling strategies.
1. Protected Amino Acid Synthesis
D-Alanine benzyl ester tosylate is used in protected amino acid synthesis workflows where a D-alanine stereocenter must be retained through amide bond formation and subsequent deprotection steps. The tosyl-protected amine suppresses undesired side reactions during ester handling and coupling chemistry, while the benzyl ester serves as a removable C-terminal protecting group compatible with hydrogenolysis-based deprotection. The defined D-configuration makes the compound suitable for stereochemically controlled preparation of D-amino acid building blocks used in peptide coupling chemistry. The resulting protected alanine derivative can be carried forward into N-protected amino acid sequences and other chiral intermediate assemblies used in fine chemical synthesis.
2. Peptide Coupling Chemistry
D-Alanine benzyl ester tosylate is applied in peptide synthesis planning as a chiral amino acid ester precursor that can be converted into activated coupling partners or directly used after appropriate functional group adjustments. The tosyl-protected N-terminus provides a stable handle for minimizing racemization and for controlling reactivity during peptide bond construction, while the benzyl ester can be maintained during coupling and later removed to reveal a carboxylate for chain extension or terminal functionalization. The D-alanine backbone supports incorporation of D-residues into peptide sequences, enabling access to peptides with altered conformational preferences and protease resistance profiles in biochemical research contexts. The compound's protected functional groups align with standard peptide chemistry logic for stepwise assembly and stereochemical fidelity.
3. Chiral Building Block Development
D-Alanine benzyl ester tosylate functions as a chiral amino acid intermediate for developing enantiopure fragments used in synthetic organic chemistry and stereoselective synthesis. The presence of a single stereogenic center at the alanine carbon, combined with orthogonal protection (tosyl on nitrogen and benzyl on oxygen), enables sequential deprotection and derivatization without losing stereochemical integrity. The tosyl group can be removed under conditions that selectively unmask the amine, while the benzyl ester can be cleaved to generate a carboxylic acid for further functionalization such as amide formation, ester exchange, or attachment to heterocycles. The compound can therefore serve as a feedstock for building chiral scaffolds, including D-amino acid-containing peptidomimetic fragments and other stereochemically defined intermediates.
4. Peptidomimetics And SAR Studies
D-Alanine benzyl ester tosylate is relevant to peptidomimetic construction and structure-activity relationship studies where D-alanine units are incorporated to modulate backbone geometry and side-chain presentation. The protected amine and esterified carboxyl group allow controlled installation into larger molecular frameworks, supporting the synthesis of analog series that maintain consistent stereochemistry across analogs. The tosyl protection strategy helps manage chemoselectivity during assembly of amide linkages and can be integrated into modular synthesis of peptide-like scaffolds. The downstream products derived from this intermediate can be used to generate SAR-focused libraries of D-amino acid-containing compounds for analytical comparison and chemical biology investigations.
5. Pharmaceutical Intermediate Preparation
D-Alanine benzyl ester tosylate is utilized in pharmaceutical intermediate preparation where orthogonally protected amino acid derivatives are required for manufacturing-oriented synthesis of D-amino acid motifs. The benzyl ester provides a protected carboxyl functionality that can be transformed into activated acid equivalents or converted to free acid at defined stages, while the tosyl-protected amine supports controlled coupling chemistry and reduces premature reactivity. The D-configuration supports the production of stereochemically defined intermediates used in the synthesis of D-amino acid-containing drug-like molecules and related process intermediates. The compound's protection pattern aligns with scalable stepwise synthesis concepts common to industrial chemical manufacturing and fine chemical production of chiral building blocks.
6. Analytical Research Standards
D-Alanine benzyl ester tosylate can be employed in analytical research as a stereochemically defined reference intermediate for method development and characterization of D-alanine derivatives. The presence of both tosyl and benzyl ester functionalities provides distinct spectroscopic and chromatographic signatures that can support identification of protected amino acid intermediates in reaction monitoring. The compound's orthogonal protecting groups also make it suitable for preparing related standards after deprotection to generate corresponding D-alanine esters or acids for comparative analysis. The resulting analytical workflow can support quality control of peptide building block preparations and verification of stereochemical integrity in amino acid derivatization studies.
2. TMEM16F and dynamins control expansive plasma membrane reservoirs
4. Store-operated Ca2+ entry sustains the fertilization Ca2+ signal in pig eggs
If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at . We will endeavor to provide highly satisfying products and services.
Creative Peptides is a trusted CDMO partner specializing in high-quality peptide synthesis, conjugation, and manufacturing under strict cGMP compliance. With advanced technology platforms and a team of experienced scientists, we deliver tailored peptide solutions to support drug discovery, clinical development, and cosmetic innovation worldwide.
From custom peptide synthesis to complex peptide-drug conjugates, we provide flexible, end-to-end services designed to accelerate timelines and ensure regulatory excellence. Our commitment to quality, reliability, and innovation has made us a preferred partner across the pharmaceutical, biotechnology, and personal care industries.
Read More