H-beta-(3-Benzothienyl)-Ala-OH

H-beta-(3-Benzothienyl)-Ala-OH is a chiral alanine derivative in which the β-position bears a 3-benzothienyl substituent, creating a stereodefined amino acid scaffold with an aniline-free aromatic heterocycle. The molecule contains a free carboxylic acid and a primary amino group (or amino acid zwitterionic form under typical conditions), enabling standard peptide coupling chemistry while the benzothiophene ring system provides strong π-surface character and hydrophobic/aromatic recognition features. The β-aryl substitution increases conformational bias relative to unsubstituted alanine and can influence amide bond formation and subsequent side-chain derivatization outcomes. As an amino acid building block and chiral intermediate, H-beta-(3-Benzothienyl)-Ala-OH is well-suited for downstream preparation of substituted peptides, peptidomimetics, and heteroaromatic functional analogs used in synthetic and biochemical research.

1. Peptide Synthesis

H-beta-(3-Benzothienyl)-Ala-OH is suitable for peptide building-block incorporation in solid-phase or solution-phase peptide synthesis where alanine-like backbone chemistry is required. The free carboxylic acid and amino functionality can be converted into coupling-ready protected forms, while the benzothiophene-containing β-substituent remains a stable aromatic side-chain motif during amide bond formation. Side-chain aromaticity can be leveraged for controlled hydrophobic packing and for generating peptide analogs with distinct binding profiles in structure-activity relationship studies. Incorporation into short peptides or longer peptide segments enables access to heteroaryl-substituted sequences used for ligand mapping, receptor/target probing, and scaffold diversification in peptide science.

2. Peptidomimetics And SAR

H-beta-(3-Benzothienyl)-Ala-OH supports medicinal chemistry workflows focused on peptidomimetic construction and structure-activity relationship studies by introducing a benzothienyl β-substituent that can modulate conformation and aromatic interactions. The chiral center at the alanine α-position provides stereochemical control, enabling stereodefined analog series for SAR comparisons and for mapping stereochemical contributions to molecular recognition. The amino acid backbone serves as a handle for converting to amide-linked fragments, cyclization precursors, or constrained scaffolds where the heteroaromatic ring acts as a pharmacophore element. Downstream derivatives prepared from this amino acid can be used as fragment-like units in iterative design cycles that connect amino acid derivatization chemistry to measurable binding or functional readouts.

3. Chemical Biology Probes

H-beta-(3-Benzothienyl)-Ala-OH can be applied in chemical biology for constructing aromatic amino acid probes that participate in noncovalent interactions and enable labeling strategies. The benzothiophene moiety provides a rigid, π-rich side-chain that can be used to tune membrane affinity, protein surface engagement, or assay background through controlled hydrophobic/aromatic character. The amino acid functionality enables conjugation-compatible transformations, including N-protection for selective coupling and subsequent deprotection to introduce linkers for biotin, fluorophore, or affinity tags. Resulting labeled or tag-bearing derivatives can serve as biochemical research intermediates for target engagement studies, imaging reagent development, and biomolecular interaction mapping.

4. Chiral Building Block Synthesis

H-beta-(3-Benzothienyl)-Ala-OH functions as a chiral amino acid intermediate for stereoselective synthesis of β-substituted heteroaryl derivatives. The defined α-stereochemistry and β-heteroaryl substituent allow downstream formation of dipeptide analogs, constrained amide frameworks, and stereochemically defined fragments used in asymmetric synthesis planning. The carboxylic acid and amino groups provide orthogonal functional handles for protecting-group strategies, such as temporary N-protection for selective coupling and controlled carboxyl activation for sequential transformations. Chiral derivatives derived from this scaffold can be employed as reference standards and as building blocks in synthetic organic chemistry programs targeting stereodefined heteroaromatic amino acid motifs.

5. Pharmaceutical Intermediate Preparation

H-beta-(3-Benzothienyl)-Ala-OH is applicable to pharmaceutical intermediate preparation where heteroaryl-substituted amino acid fragments are required for API-adjacent synthesis. The amino acid backbone supports conversion into activated esters, amide-forming intermediates, or protected forms compatible with multi-step process chemistry, while the benzothiophene ring provides a chemically robust aromatic group that can withstand typical coupling and protection/deprotection sequences. Stereochemical integrity at the α-center can be maintained through appropriate protection-group selection and coupling conditions, enabling consistent generation of stereodefined intermediates for medicinal chemistry libraries. Downstream use can include preparation of peptidomimetic linkers, heteroaryl-containing amide fragments, and scaffold components used in fine chemical synthesis and specialty chemical production.

6. Analytical Research Standards

H-beta-(3-Benzothienyl)-Ala-OH can be used in analytical research as a stereodefined amino acid standard and as a reference material for method development in peptide and amino acid analysis. The combination of a carboxylic acid and primary amino group supports predictable derivatization behavior for chromatographic detection, while the benzothiophene chromophore can enhance UV/visible detectability in many analytical platforms. The defined stereochemistry enables unambiguous discrimination of epimers or regioisomers in chiral chromatography and supports quality control of peptide building-block incorporation. Analytical derivatives prepared from this amino acid can further serve as calibration components for monitoring protected amino acid synthesis, coupling efficiency proxies, and downstream intermediate identity verification in research and industrial settings.

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