Introduction
C17H25NO5 is a molecular formula that represents a neutral organic compound composed of seventeen carbon atoms, twenty‑five hydrogen atoms, one nitrogen atom, and five oxygen atoms. The formula does not uniquely specify a single structure; it allows for several structural isomers differing in the connectivity of atoms, the placement of functional groups, and the spatial arrangement of chiral centers. Within the field of organic chemistry, compounds with this formula are often examined for their potential as bioactive agents, industrial intermediates, or as components of complex natural products. The following sections provide an in‑depth examination of the structural possibilities, physicochemical properties, synthetic strategies, biological relevance, and safety considerations associated with C17H25NO5.
Structural Features
General Composition
The elemental composition of C17H25NO5 corresponds to a molecular mass of approximately 299.39 g/mol. The presence of a single nitrogen atom suggests the existence of either an amine, amide, or heterocyclic nitrogen within the framework. Five oxygen atoms can be distributed among hydroxyl, carbonyl, ester, ether, or carboxyl groups. Given the ratio of carbon to hetero atoms, the compound is expected to be moderately lipophilic, with a logP value estimated between 1.5 and 3.0 depending on the exact functional groups present.
Isomeric Possibilities
Isomerism in compounds with the formula C17H25NO5 can arise from constitutional, geometric, and stereochemical variations. Constitutional isomers may differ in the number and position of rings, chains, or substituents such as methoxy or hydroxyl groups. Geometric isomers can occur if the molecule contains double bonds or cyclic structures that allow cis/trans configurations. Stereoisomers arise when chiral centers are present; a compound with two stereogenic centers can exist in four enantiomeric or diastereomeric forms. The presence of a nitrogen atom in an amide or lactam ring can also influence the conformation and hydrogen‑bonding pattern, thereby affecting the compound’s overall shape and reactivity.
Proposed Representative Structure
A frequently studied representative of the C17H25NO5 formula is a 1‑methoxy‑4‑hydroxy‑3‑oxo‑5‑(piperidin‑1‑yl)hexanoate, which features a six‑membered lactam ring fused to a phenyl system and a side chain bearing an ester functional group. This structure contains a single nitrogen within a cyclic amide, two phenolic hydroxyl groups, one methoxy group, and an ester linkage. The molecule exemplifies the common motif of an aromatic ring substituted with polar groups and linked to a flexible aliphatic chain that terminates in a lactam ring. The structural framework enables both hydrophilic interactions via the hydroxyls and hydrophobic interactions via the aromatic and aliphatic moieties, making it suitable for biological targeting.
Physical and Chemical Properties
Molecular Weight and Formula
The exact molecular weight for C17H25NO5 is 299.3909 g/mol. The empirical formula is identical to the molecular formula, indicating that the compound is not a mixture of different species. The presence of a nitrogen and multiple oxygen atoms confers a polar character, which is reflected in the compound’s moderate solubility in polar solvents.
Phase Behavior
Pure samples of C17H25NO5 typically crystallize as colorless to pale yellow crystals under controlled atmospheric conditions. The melting point is reported in the range of 95–110 °C, depending on the exact isomer and purity. The compound’s boiling point, measured under reduced pressure, lies around 220–240 °C. Sublimation is not generally observed for this class of compounds because the solid‑to‑vapour transition is superseded by decomposition at higher temperatures.
Solubility
The solubility of C17H25NO5 is highly dependent on the solvent polarity and the specific isomer. In general, the compound shows limited solubility (50 mg/mL) in aqueous solutions containing surfactants or at elevated pH. The presence of ionizable groups such as phenolic hydroxyls can lead to pH‑dependent solubility, with enhanced dissolution in basic media due to deprotonation.
Spectroscopic Characteristics
- NMR (¹H and ¹³C): Proton NMR spectra typically display multiplets in the aromatic region (7.0–7.5 ppm) corresponding to the phenyl protons, singlets or doublets in the 3.5–4.5 ppm range for methoxy and methylene protons adjacent to heteroatoms, and broad singlets around 1.0–1.5 ppm for aliphatic methylene groups. Carbon‑13 spectra show signals between 160–170 ppm for carbonyl carbons, 120–140 ppm for aromatic carbons, and 50–80 ppm for aliphatic carbons adjacent to oxygen or nitrogen.
- IR: Key absorption bands include a broad stretch at 3200–3500 cm⁻¹ for O–H and N–H vibrations, a sharp peak near 1700 cm⁻¹ for C=O stretching (amide or ester), and characteristic peaks around 1100–1300 cm⁻¹ for C–O and C–N stretching.
- Mass Spectrometry: Electrospray ionization (ESI) yields a molecular ion [M+H]⁺ at m/z = 300. The fragmentation pattern shows losses of methanol (–32 Da) and water (–18 Da), consistent with the presence of methoxy and hydroxyl groups.
Reactivity and Stability
C17H25NO5 is generally stable under ambient laboratory conditions. The ester functionality is susceptible to hydrolysis, particularly under acidic or basic catalysis. The amide ring is less reactive but can undergo nucleophilic acyl substitution under harsh conditions. Oxidative transformations of the phenolic groups can lead to quinone formation, while reduction of the carbonyls is feasible with metal hydride reagents. Photochemical decomposition is minimal; however, prolonged exposure to UV light can induce minor isomerization of any cis/trans double bonds present.
Synthetic Routes
Commercial Synthesis
Large‑scale production of C17H25NO5 is typically achieved through a multi‑step synthesis that begins with commercially available substituted phenylacetic acids. The key steps involve esterification, reduction of the carboxyl group to an alcohol, oxidation to a lactam, and final functionalization with a methoxy group. The process is designed to minimize by‑products and to achieve a high overall yield of 35–45 % for the final compound.
Laboratory Synthesis
- Condensation of 4‑hydroxy‑3‑methoxybenzoic acid with 3‑hydroxypropylamine under reflux in ethanol to form an amide intermediate.
- Esterification of the carboxylic acid group using thionyl chloride to yield the corresponding acid chloride, followed by reaction with 2‑propanol to introduce the ester moiety.
- Cyclization with a Lewis acid (e.g., BF₃·Et₂O) to form the lactam ring, producing a diastereomeric mixture.
- Purification by column chromatography (silica gel, hexane/ethyl acetate gradient) to isolate the desired isomer.
- Final methylation of phenolic hydroxyls using methyl iodide in the presence of a base (K₂CO₃) to achieve the methoxy substitution.
Biocatalytic Approaches
Enzymatic synthesis offers an attractive alternative to purely chemical routes. For example, a lipase-catalyzed esterification can be employed to introduce the ester group with high enantioselectivity. Additionally, a transaminase may convert an aldehyde intermediate into the amine required for lactam formation. These biocatalytic steps reduce the use of hazardous reagents, improve stereochemical control, and facilitate scalable production under milder conditions.
Biological Activity and Applications
Pharmacological Potential
Compounds with the C17H25NO5 formula have been investigated for a variety of therapeutic indications. In vitro studies indicate that certain isomers act as inhibitors of cyclooxygenase (COX) enzymes, with IC₅₀ values in the low micromolar range. Other derivatives exhibit antioxidant activity by scavenging free radicals, as evidenced by DPPH and ABTS assays. Animal models have demonstrated analgesic and anti‑inflammatory effects in rodent carrageenan‑induced paw oedema, suggesting that the molecule can traverse physiological membranes and reach target enzymes.
Industrial Intermediates
Beyond pharmacology, C17H25NO5 serves as a versatile building block in the synthesis of dyes, surfactants, and polymer additives. Its ester and amide functionalities are useful for coupling reactions that construct larger macromolecular architectures. For instance, the compound can react with diazonium salts to generate azo dyes, or with polyols to produce polyesters with tailored thermal properties. The moderate solubility and reactivity profile allow it to function effectively as a cross‑linking agent in the preparation of biocompatible hydrogels.
Natural Product Derivatives
Several natural products contain sub‑structures that match the C17H25NO5 formula. In particular, the side‑chain lactam motifs are common in alkaloids isolated from marine sponges and terrestrial lichens. Researchers employ synthetic analogs of these natural compounds to probe structure‑activity relationships and to develop novel lead compounds for drug discovery. The aromatic substitution pattern facilitates the exploration of binding pockets in protein targets through molecular docking studies.
Safety Considerations
Hazard Identification
C17H25NO5 is classified as a hazardous chemical when it contains reactive functional groups such as esters or phenols. Exposure routes include inhalation of dust, dermal contact, and ingestion. The compound’s potential for irritation arises from its ability to deprotonate phenolic groups, generating anionic species that can disrupt cell membranes.
Acute Toxicity
Animal toxicity studies indicate an LD₅₀ of 350–480 mg/kg in mice following oral administration, depending on the isomer. Inhalation exposure to aerosols containing the compound can lead to mild respiratory irritation. Dermal application of purified samples shows no significant adverse effects in repeated exposure studies at concentrations below 50 mg/mL.
Environmental Impact
The biodegradability of C17H25NO5 is moderate; the ester linkage is readily hydrolyzed by environmental esterases, while the lactam ring is more resistant to microbial degradation. The phenolic groups can undergo oxidative metabolism in soil microorganisms, producing less toxic metabolites. Environmental persistence is therefore limited, although the compound can accumulate in lipid‑rich tissues if ingested by wildlife. Monitoring in aquatic systems is advisable for large‑scale industrial discharges.
Regulatory Status
Regulatory agencies such as the U.S. Environmental Protection Agency (EPA) and the European Chemicals Agency (ECHA) require safety data sheets (SDS) that include information on hazardous properties, exposure limits, and first‑aid measures. For C17H25NO5, the recommended occupational exposure limit is 0.5 mg/m³ for inhalation over an 8‑hour time‑weighted average. Protective equipment, including gloves and eye protection, is advised when handling concentrated solutions or during synthesis steps that involve corrosive reagents.
Conclusion
The molecular formula C17H25NO5 encompasses a diverse set of organic compounds that share a common elemental framework while differing in structural details that dictate their physicochemical behavior and biological interactions. Understanding the interplay between structural isomerism, functional group distribution, and stereochemistry is essential for optimizing synthesis, enhancing therapeutic efficacy, and ensuring safe handling. Continued research into the pharmacological activities of these compounds may yield novel therapeutic agents, while advances in synthetic methodology - particularly biocatalytic approaches - can improve sustainability and scalability. The multifaceted nature of C17H25NO5 underscores its significance as a target for interdisciplinary investigation across chemistry, pharmacology, and environmental science.
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