Ac-Ala-alpha-naphthyl ester is an amino acid ester derived from alanine in which the carboxyl group is esterified with alpha-naphthol, and the N-terminus bears an acetyl (Ac) acetamide functionality. The molecule therefore contains an acetylated amino group (no free amino functionality), an ester linkage connecting the alanine alpha-carbon to the naphthyl oxygen, and a hydrophobic alpha-naphthyl aromatic moiety that can influence solubility and spectroscopic behavior. As an alanine-based ester, it is used as a defined substrate or labeling reagent in analytical method development and in peptide-chemistry workflows where controlled release or detection of alanine-containing fragments is required.
CAT No: CP27372
CAS No:69975-68-4
Synonyms/Alias:L-Alanine,N-acetyl-,1-naphthalenylester;naphthalen-1-yl(2S)-2-acetamidopropanoate;69975-68-4;Naaape;AC1Q5JSW;AC1L2P8K;CTK6A0325;Acetyl-L-alanine-1-naphthylester;ZINC2528218;N-Acetylalaninealpha-naphthylester;AR-1J2948;ACETYL-L-ALANINE-1-NAPHTHYLESTER;N-Acetyl-L-alaninealpha-naphthylester;AM031165;L-Alanine,N-acetyl-,1-naphthalenylester
Ac-Ala-alpha-naphthyl ester is an N-acetylated alanine alpha-naphthyl ester designed as a small-molecule amino acid derivative rather than a free amino acid building block. The combination of an acetylated amino terminus and an aryl ester at the alpha position makes it useful in enzymology and analytical chemistry workflows where controlled reactivity and a hydrophobic naphthyl group support detection and substrate-like behavior. Researchers typically use this format to probe aminopeptidase or related protease activities and to generate defined standards for method development, where the fixed N-acetyl/ester pattern reduces ambiguity from variable ionization states or competing functional groups.
1. Enzyme Substrate Assays
Ac-Ala-alpha-naphthyl ester is used as a defined substrate analog in enzyme activity studies, particularly in assays that monitor cleavage of the amino acid ester linkage to generate a measurable naphthyl-derived signal. Enzymology groups and screening labs value the N-acetylated alanine motif for maintaining a consistent "substrate-like" chemical environment while the alpha-naphthyl ester provides a convenient chromophore/fluorophore handle for readout. This derivative format is commonly selected when investigators need a reproducible small-molecule substrate with fewer variables than free amino acids and when assay design benefits from the hydrophobic aryl group to drive partitioning into the assay phase or to improve signal generation.
2. Protease Mechanism Studies
Ac-Ala-alpha-naphthyl ester supports mechanistic and selectivity experiments in protein chemistry by providing a structurally constrained amino acid derivative whose cleavage outcome can be tracked under controlled conditions. Chemical biology researchers use this type of substrate to compare relative activity across enzyme variants, inhibitor panels, or buffer systems, focusing on how the N-acetylated amino terminus and the alpha-ester linkage influence turnover. The presence of the naphthyl ester is particularly helpful in experiments where downstream detection relies on the release or transformation of the aryl moiety, enabling clear separation between background and enzymatic signal.
3. Analytical Method Development
Ac-Ala-alpha-naphthyl ester is frequently employed as an analytical standard or reference material in LC/UV or related analytical workflows that quantify amino acid ester derivatives or monitor enzymatic reaction progress. Analytical chemistry teams choose this compound because the naphthyl group provides strong chromatographic and UV response characteristics, allowing robust integration and calibration without relying on weak signals from the alanine backbone alone. In method development and validation contexts, the fixed acetylated amino terminus and defined ester functionality help ensure consistent retention and response, which improves reproducibility when optimizing extraction, separation, and detection parameters for amino acid ester substrates.
4. Inhibitor Screening Support
Ac-Ala-alpha-naphthyl ester is used in inhibitor screening and pre-screening workflows where enzyme activity is measured as a function of inhibitor concentration using a substrate that yields a clear, assay-compatible readout. Medicinal chemistry and chemical biology groups often prefer this derivative format to reduce assay variability, since the N-acetylated alanine and the alpha-naphthyl ester deliver a consistent chemical substrate profile across runs. The aryl ester component supports straightforward signal generation, helping teams evaluate inhibitor potency trends and rank-order candidates before moving to more complex substrate systems.
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