L-Tyrosine allyl ester tosylate is an amino acid derivative in which L-tyrosine is converted to an allyl ester at the carboxyl group while the phenolic hydroxyl on the tyrosine side chain is masked as a tosylate (tosyl ester). The molecule retains the amino functionality and the aromatic phenyl ring, but the carboxyl is esterified and the phenolic oxygen bears the tosyl protecting group, providing chemoselective control over O-functional reactivity and side-chain participation in subsequent steps. In peptide and amino-acid chemistry workflows, this protected tyrosine derivative is used as a precursor for stepwise assembly or functionalization of tyrosine-containing intermediates, and the allyl ester and tosylate groups provide handles for orthogonal deprotection strategies during synthesis and derivatization.
CAT No: CP02145
L-Tyrosine allyl ester tosylate is a chiral tyrosine derivative in which the aromatic phenol is present as a protected functionality while the amino acid carboxyl group is converted to an allyl ester and the phenolic oxygen is further activated as a tosylate. The molecule therefore contains a stereogenic α-carbon characteristic of L-tyrosine, a protected phenolic leaving group (tosylate) suited for controlled substitution, and an allyl ester handle that can be manipulated under standard ester/allyl chemistry conditions. The combination of an allyl ester and a sulfonate-protected phenol provides orthogonal reactivity patterns for stepwise deprotection, functional group interconversion, and peptide-coupling compatibility planning. The resulting reactivity profile supports its use as a chiral amino acid intermediate for tyrosine side-chain modification and downstream conversion into protected amino acid building blocks.
1. Peptide Synthesis
L-Tyrosine allyl ester tosylate is applied in peptide synthesis planning as a tyrosine side-chain functionalization intermediate prior to coupling, where the allyl ester can serve as a temporary C-terminal protection strategy during fragment assembly. The tosylate on the phenolic oxygen enables controlled side-chain derivatization before final incorporation or after orthogonal deprotection, supporting selective formation of tyrosine-based peptide analogs. The L-configuration at the α-carbon is preserved through downstream transformations, enabling stereochemically consistent incorporation into protected amino acid sequences. The compound can be used to generate tyrosine-containing peptide building blocks with defined side-chain substitution patterns for solid-phase or solution-phase workflows.
2. Amino Acid Side-Chain Functionalization
L-Tyrosine allyl ester tosylate is suited for amino acid derivatization workflows focused on tyrosine side-chain chemistry, leveraging the tosylate group as an activated leaving group for nucleophilic substitution. The phenolic tosylate can be converted into alternative O-substituted motifs while maintaining the aromatic ring framework, allowing access to ether, thioether, or other oxygen-functionalized tyrosine derivatives depending on the nucleophile employed. The allyl ester provides a separate functional handle for subsequent ester manipulation, enabling sequential protection/deprotection logic that reduces cross-reactivity between side-chain and carboxyl functionality. The product thereby supports the construction of stereodefined, side-chain-modified amino acid intermediates used in synthetic organic chemistry and peptide analog development.
3. Chiral Building Block Development
L-Tyrosine allyl ester tosylate functions as a chiral amino acid intermediate for stereoselective synthesis routes that require retention of the L-tyrosine stereocenter while tailoring functional groups for later coupling. The presence of an allyl ester and a phenolic tosylate creates a protected amino acid derivative platform with orthogonal reactivity, supporting stepwise conversion into alternative protected forms such as carboxyl-protected amino acid derivatives and differently protected tyrosine side-chain variants. The sulfonate activation provides a mechanistic handle for installing substituents with defined connectivity on the aromatic oxygen, which is often required for structure-activity relationship studies and binding-site mimicry in peptidomimetic scaffolds. The compound's structured functional group layout makes it compatible with downstream conversion into standardized building blocks for library synthesis and method development in fine chemical manufacturing.
4. Chemical Biology And Labeling
L-Tyrosine allyl ester tosylate is relevant to chemical biology and biomolecular labeling strategies that rely on site-specific tyrosine side-chain modification chemistry. The tosylate-activated phenolic oxygen can be transformed into functional groups compatible with conjugation handles, enabling preparation of tyrosine-bearing probes or modified amino acid residues for affinity reagents. The allyl ester functionality can be used as a temporary C-terminal protection element during probe assembly, supporting controlled generation of intermediates that can later be converted into coupling-ready forms. The compound's stereodefined L-tyrosine backbone aligns with the requirements of peptide-based chemical probes and enables downstream formation of labeled peptides or peptidomimetic constructs for biochemical research.
5. Process Chemistry Intermediate
L-Tyrosine allyl ester tosylate is suitable for process chemistry intermediate preparation where orthogonal protecting-group strategy and predictable functional group interconversion are required for scalable synthesis. The allyl ester provides a manipulable carboxyl protection format that can be carried through multiple steps and then converted to alternative acid or activated forms for subsequent manufacturing stages. The tosylate offers a robust activation mode for side-chain substitution, enabling route design that separates aromatic oxygen functionalization from carboxyl handling. The compound's defined stereochemistry and protected-group architecture support consistent batch-to-batch intermediate quality for downstream protected amino acid synthesis and peptide building block production in industrial fine chemical workflows.
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