(2-Methylindol-1-yl)acetic acid · DCHA is a non-proteinogenic amino acid derivative featuring an indole ring substituted at the 2-position with a methyl group and linked through a methylene to a carboxylic acid, forming a zwitterionic amino-acid-like scaffold with an indole N-substitution at the 1-position. The molecule contains a free carboxyl functional group and an indole nitrogen that can participate in acid-base behavior, and the "· DCHA" notation indicates formation of a salt with dicyclohexylamine, which modifies solubility and handling without changing the core indolylacetic acid connectivity. In research settings, this indolylacetic acid salt is used as a defined building block for chemical synthesis and for preparing indole-containing amino acid analogues used in structure-activity studies, peptide or conjugate precursor synthesis, and analytical method development where controlled chemical identity and salt form are relevant.
(2-Methylindol-1-yl)acetic acid · DCHA is an indole-based amino acid derivative supplied as a dicyclohexylamine (DCHA) salt, combining an indole aromatic system with a carboxylic acid functionality for downstream derivatization and controlled handling. The indole motif supports broad use in medicinal chemistry and chemical biology workflows, while the salt form improves practical reagent handling for synthesis and analytical preparation. This compound is typically selected when an indole-acetic acid scaffold is needed as a defined building block for structure-activity relationship (SAR) studies or for constructing indole-containing conjugates and analogs.
1. Medicinal Chemistry SAR Building Blocks
(2-Methylindol-1-yl)acetic acid · DCHA is used by medicinal chemistry groups to prepare indole-acetic acid analogs for SAR campaigns, particularly where the indole ring serves as a key pharmacophore and the acetic acid side chain provides a consistent attachment point for further functionalization. The DCHA salt form is frequently chosen in lead optimization workflows to support reliable weighing, improved formulation behavior in organic synthesis, and consistent material handling during parallel synthesis of small-molecule libraries. Researchers commonly incorporate this scaffold into amide, ester, or linker-bearing derivatives to probe substituent effects on binding regions and physicochemical properties.
2. Indole-Conjugate Linker Synthesis
(2-Methylindol-1-yl)acetic acid · DCHA is applied in chemical biology and bioconjugation-adjacent synthesis as an indole-containing linker precursor, enabling construction of conjugates where the indole moiety acts as a recognition handle or aromatic tag. In practice, teams developing small-molecule probes, receptor ligands, or tagged analogs use this building block to introduce an indole-acetic acid unit that can be carried through to final coupling partners. The presence of a carboxylic acid functionality supports straightforward downstream conversion into activated intermediates used for assembling conjugation-ready derivatives, while the indole aromatic system provides a stable scaffold for subsequent labeling or affinity-based workflows.
3. Pharmaceutical Intermediate Development
(2-Methylindol-1-yl)acetic acid · DCHA is a practical intermediate for industrial and contract synthesis teams preparing downstream indole-containing intermediates used in route development and scale-up. Process chemists often select this salt form to improve operational practicality during multi-step synthesis, especially when isolations and transfers are performed repeatedly in lead-to-candidate manufacturing. The compound's defined indole-acetic acid structure makes it useful as a standardized input for generating families of related intermediates that share a common core, supporting efficient reuse across project timelines and enabling consistent impurity profiling and analytical method transfer.
4. Analytical Reference Derivatives
(2-Methylindol-1-yl)acetic acid · DCHA is also used in analytical method development and quality control contexts where indole-acetic acid derivatives are monitored, quantified, or characterized. Laboratories preparing LC-MS or HPLC workflows for indole-containing intermediates and analogs may derive reference materials from this scaffold to support calibration, identity confirmation, and impurity tracking across synthetic sequences. The salt form helps maintain consistent material handling for preparing weighed standards and derivative reference solutions, supporting reproducible analytical comparisons during process optimization and SAR progression.
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