Bpoc-Thr(tBu)-OH · CHA is a protected threonine derivative featuring the threonine α-amino acid backbone with a side-chain hydroxyl and a Bpoc-type amino protecting group, along with a tert-butyl-protected side-chain hydroxyl (Thr(tBu)) and an additional CHA component associated with the solid form or counterbalance. The molecule contains a free carboxylic acid functional group while the amino functionality is masked by the Bpoc protecting group and the side-chain alcohol is sterically protected as a tert-butyl ether, which together modulate chemoselectivity during stepwise assembly of peptide fragments. Bpoc-Thr(tBu)-OH · CHA is used as a protected amino acid building block for peptide synthesis and related derivatization workflows where controlled deprotection and side-chain stability are required to manage functional-group compatibility.
Bpoc-Thr(tBu)-OH · CHA is a chiral, side-chain protected threonine derivative supplied as a Bpoc-protected amino acid esterified or otherwise associated with a CHA countercomponent, designed for controlled peptide and intermediate synthesis. The structure contains the threonine backbone with a stereogenic center at the alpha-carbon, a side-chain hydroxyl protected as a tert-butyl ether (Thr(tBu)), and an N-protecting group based on Bpoc that can be removed under conditions compatible with peptide chemistry. The presence of a protected carboxyl functionality and the orthogonality between N-protection and side-chain hydroxyl protection support selective coupling and later functional group unveiling for downstream derivatization. The resulting reactivity profile is aligned with protected amino acid synthesis, enabling amide bond formation while preserving the stereochemical integrity of the threonine residue for peptide building block preparation and synthetic intermediate generation.
1. Peptide Synthesis
Bpoc-Thr(tBu)-OH · CHA is applied in peptide coupling workflows where a stereodefined threonine residue is required at a specific position in a growing chain. The Bpoc-protected nitrogen supports amide bond formation while the tert-butyl-protected side-chain hydroxyl prevents competing O-acylation during standard peptide coupling chemistry. The compound's protected-carboxyl amino acid format can be incorporated into peptide building block preparation strategies that rely on orthogonal deprotection sequences, allowing later exposure of the threonine hydroxyl for phosphorylation-mimetic chemistry, glycosylation handles, or further side-chain functionalization. Downstream peptide analog construction benefits from the preserved alpha-stereochemistry and the controlled timing of hydroxyl deprotection, supporting structure-defined peptide libraries and sequence-specific synthetic targets in applied peptide science.
2. Amino Acid Derivatization
Bpoc-Thr(tBu)-OH · CHA is suitable for amino acid derivatization programs that convert threonine into functionalized intermediates for chemical biology and materials-oriented scaffolds. The side-chain tert-butyl ether provides a protected hydroxyl group that can be selectively deprotected to generate a reactive alcohol for subsequent esterification, ether formation, or conjugation chemistry. The Bpoc N-protection strategy enables controlled access to the amine functionality during intermediate elaboration, supporting stepwise synthesis of amino acid derivatives where both N- and O-functional groups must be manipulated without loss of stereochemical fidelity. The resulting functionalized threonine derivatives can serve as downstream precursors for peptidomimetic construction, linker synthesis, and stereodefined building blocks used in fine chemical synthesis and applied molecular design.
3. Chemical Biology Probes
Bpoc-Thr(tBu)-OH · CHA is used in chemical biology research to prepare threonine-containing probes and labeled peptide fragments where orthogonal protection is required for selective modification. The protected threonine hydroxyl enables late-stage installation of functional groups such as clickable handles, affinity tags, or reporter moieties after peptide assembly or fragment coupling. The stereogenic alpha-carbon and protected side-chain oxygen help maintain recognition-relevant geometry when generating peptide analogs for binding studies, enzyme substrate mapping, or pathway interrogation. The N-protecting group and side-chain protection pattern support controlled deprotection schedules that align with multi-step probe synthesis, enabling generation of structured biomolecule-modification intermediates for downstream analytical and mechanistic investigations.
4. Pharmaceutical Manufacturing
Bpoc-Thr(tBu)-OH · CHA is relevant to pharmaceutical manufacturing of peptide-based intermediates and process chemistry routes where protected amino acids must be handled reproducibly at scale. The compound's N-protected threonine format and orthogonal side-chain hydroxyl protection facilitate sequential coupling and controlled deprotection steps that are compatible with manufacturing-oriented peptide synthesis planning. The ability to preserve threonine stereochemistry while preventing side reactions from the hydroxyl group supports consistent intermediate quality during peptide building block preparation and downstream conversion to drug-relevant peptide fragments. The protected amino acid strategy can be integrated into industrial intermediate preparation for solid-phase or solution-phase assembly, supporting reliable generation of defined peptide structures used in applied pharmaceutical process development.
5. Process Chemistry Intermediate
Bpoc-Thr(tBu)-OH · CHA is employed as a chiral amino acid intermediate in process chemistry for producing threonine-containing derivatives with controlled functional group availability. The Bpoc N-protection and tert-butyl side-chain protection provide a practical protection scheme for minimizing undesired reactivity during coupling, purification, and intermediate isolation steps. The compound can be applied to manufacturing route design where selective deprotection enables downstream transformations such as hydroxyl activation, conjugation to electrophiles, or conversion into standardized peptide building blocks for further synthesis. The chiral, protected amino acid framework supports scalable fine chemical synthesis of stereodefined intermediates that feed into peptide science, peptidomimetic construction, and other applied industrial chemical manufacturing workflows.
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