C12h18n2o

C12H18N2O

C12H18N2O is an organic molecular formula that corresponds to a range of possible structures. The compound contains twelve carbon atoms, eighteen hydrogen atoms, two nitrogen atoms, and one oxygen atom. The combination of these elements permits several functional group arrangements, including amide, imide, ester, or heterocyclic scaffolds. Because the formula is not uniquely defined by the connectivity of atoms, multiple stereoisomers and constitutional isomers may exist. The following sections provide an overview of the structural possibilities, synthetic strategies, physicochemical characteristics, potential biological activities, and industrial relevance of compounds with this molecular formula.

Structural Isomerism

Isomerism arises when molecules share the same elemental composition but differ in the connectivity of atoms or in spatial arrangement. For C12H18N2O, the presence of two nitrogen atoms and one oxygen atom suggests the possibility of amide or heterocyclic functionalities. Additionally, the twelve carbon framework allows for linear aliphatic chains, branched alkanes, or aromatic rings. The following are representative structural classes that fit the formula:

Amino acid derivatives – The backbone of an amino acid (–COOH and –NH2) can be modified to produce derivatives such as N,N-dimethylated analogues.
Secondary amides – Compounds containing a carbonyl group bonded to a nitrogen that also carries alkyl substituents.
Imides – Molecules containing two amide carbonyl groups sharing a central nitrogen.
Heterocyclic rings – Structures such as pyrrolidone, piperidinone, or benzoxazoles that incorporate nitrogen and oxygen atoms within a ring.
Aromatic amides – Aromatic rings substituted with amide or other functional groups.

Each class can further subdivide based on the placement of alkyl groups, the degree of branching, and the presence of stereogenic centers. The existence of chiral centers in some isomers may lead to enantiomers with distinct biological properties.

Chemical Classification

Amide Derivatives

Amide compounds feature a carbonyl group attached to a nitrogen atom. When the nitrogen is substituted with alkyl groups, the resulting molecule is a tertiary or secondary amide. The formula C12H18N2O can correspond to a dimethylamide where one nitrogen bears two methyl groups while the other nitrogen remains part of the amide linkage. This arrangement is common in pharmaceuticals and agrochemicals due to the stability of the amide bond and the ability to modify lipophilicity through alkyl substitution.

Secondary Amines

Secondary amines have a nitrogen atom bonded to two carbon atoms and one hydrogen atom. In the context of C12H18N2O, a secondary amine may be present in addition to an amide or ester group. Such compounds can act as intermediates in reductive amination reactions or as building blocks for heterocyclic synthesis.

Heterocyclic Compounds

Heterocycles containing nitrogen and oxygen are frequently encountered in medicinal chemistry. For C12H18N2O, plausible heterocycles include:

1,3-dioxo-1,4-butanediol (a lactone with a nitrogen substituent)
Piperidin-2-one derivatives where a nitrogen atom occupies the ring and a carbonyl group is present
Benzoxazoles substituted with alkyl chains

These structures are attractive due to their ability to participate in hydrogen bonding and π–π interactions, which can enhance receptor binding affinity.

Other Functional Group Possibilities

Less common arrangements include esters formed by the condensation of a carboxylic acid and an alcohol, where the nitrogen atom functions as a leaving group. Additionally, the formula can correspond to a mixed anhydride where two carbonyl groups are bonded to a single oxygen. The presence of an imine (C=N) within a larger skeleton is also feasible.

Methods of Synthesis

Direct Amidation

Amidation of carboxylic acids with amines is a standard route to form amide bonds. The reaction typically employs coupling reagents such as carbodiimides, coupling agents like HATU, or activation through acid chlorides. For C12H18N2O, a suitable starting material could be a dicarboxylic acid or an amide chloride, which is reacted with a secondary amine to introduce the additional nitrogen atom.

Reductive Amination

Reductive amination allows the conversion of aldehydes or ketones into amines. The process involves the formation of an imine intermediate followed by reduction with hydride donors such as sodium cyanoborohydride or hydrogen gas over a palladium catalyst. In the synthesis of C12H18N2O, a ketone with a carbonyl group may be reacted with a diamine to produce a bis-amine that subsequently undergoes cyclization or acylation.

Condensation Reactions

Condensation between a carboxylic acid and an alcohol or between two amines can produce esters or ureas. Employing dehydrating agents such as dicyclohexylcarbodiimide (DCC) or acyl chlorides ensures efficient bond formation. A urea intermediate containing both nitrogen atoms can then be further functionalized to achieve the final structure.

Use of Protecting Groups

During multi-step synthesis, protecting groups safeguard reactive functionalities. For example, tert-butyloxycarbonyl (Boc) or fluorenylmethyloxycarbonyl (Fmoc) can protect amine groups, while benzyl or tosyl groups may shield alcohols. Deprotection steps, typically involving acid or base catalysis, yield the target compound without side reactions.

Physical and Chemical Properties

General Physical Data

Compounds with the C12H18N2O formula are generally colorless to pale yellow liquids or solids at ambient temperature, depending on the degree of saturation and the presence of aromatic rings. Their melting points range from sub-ambient to moderate temperatures (−20 °C to 70 °C) for crystalline derivatives. Boiling points can span 250 °C to 400 °C, reflecting the balance between molecular weight and intermolecular interactions.

Thermal Properties

Thermal analysis methods such as differential scanning calorimetry (DSC) reveal endothermic melting transitions and exothermic decomposition events. Thermogravimetric analysis (TGA) often shows a single-step weight loss corresponding to the loss of volatile fragments at temperatures above 300 °C.

Solubility

Solubility profiles indicate good solubility in polar organic solvents like ethanol, methanol, acetone, or dimethyl sulfoxide (DMSO). Solubility in water is limited for nonpolar analogues but can be enhanced by incorporating hydrophilic substituents or by generating salt forms (e.g., hydrochloride salts).

Acidity/Basicity

The nitrogen atoms in amide and secondary amine positions confer basicity with pKa values typically between 6.5 and 9.0 for tertiary amides. Ester functionalities exhibit negligible acidity. In heterocyclic variants, ring nitrogen atoms may possess pKa values ranging from 7.5 to 9.5, depending on ring strain and electronic effects.

Spectroscopic Characteristics

Infrared

Infrared (IR) spectra typically display a strong absorption band near 1650 cm⁻¹ attributable to the amide carbonyl (C=O) stretch. A secondary amide may also exhibit a shoulder near 1550 cm⁻¹ from N–H bending. For heterocyclic lactones, a characteristic carbonyl stretch appears around 1750 cm⁻¹, while a benzoxazole ring shows absorptions between 1400 cm⁻¹ and 1300 cm⁻¹ due to aromatic C–H vibrations.

Mass Spectrometry

High-resolution mass spectrometry (HRMS) provides exact mass data that confirm the elemental composition. Fragmentation patterns often include losses of methyl groups (15 amu), dimethylamine (45 amu), or small neutral molecules such as water or carbon dioxide. The presence of nitrogen results in characteristic immonium ions when the molecule undergoes electron ionization (EI).

NMR

Proton (¹H) NMR spectra reveal chemical shifts spanning 0.8 ppm to 7.5 ppm, with methyl groups resonating between 0.9 ppm and 1.2 ppm. Alkyl methylene protons appear near 1.2 ppm to 1.8 ppm, while methine protons adjacent to heteroatoms shift downfield to 3.0 ppm to 4.5 ppm. The carbonyl carbon resonates in the range of 165 ppm to 180 ppm. Carbon (¹³C) NMR spectra confirm the presence of carbonyl carbons, alkyl carbons, and aromatic carbons, typically observed at 30 ppm to 140 ppm. Deconvolution of multiplet patterns assists in stereochemical assignments.

UV-Visible

In derivatives containing conjugated systems, UV–Vis absorption occurs between 200 nm and 320 nm. A peak near 280 nm indicates π–π* transitions in aromatic rings, while amide and imide functionalities can contribute weak absorptions around 210 nm.

Biological Activity and Pharmacology

Potential as a Lead Compound

Because the formula accommodates a stable amide core and lipophilic side chains, many analogues are evaluated as lead candidates for enzyme inhibition, receptor modulation, or antimicrobial activity. Modulating the steric bulk of nitrogen substituents can influence metabolic stability and permeability across biological membranes.

Enzyme Inhibition

Secondary amides with appropriately positioned heteroatoms can inhibit serine proteases, amidases, or oxidases. For instance, a piperidinone scaffold bearing dimethyl substitution has been reported to inhibit acetylcholinesterase with IC₅₀ values in the micromolar range. Structural analogues that incorporate an imide or lactone moiety often display stronger binding due to enhanced hydrogen-bonding capacity.

Receptor Binding

Pharmacophore models suggest that C12H18N2O derivatives can engage with G protein–coupled receptors (GPCRs) such as the histamine H₂ receptor or the β₂-adrenergic receptor. The nitrogen atoms serve as basic sites for protonation, facilitating ionic interactions with acidic residues in the binding pocket. Aromatic amide variants may also display affinity toward nuclear receptors like the peroxisome proliferator-activated receptors (PPARs).

Applications in Industry

Pharmaceuticals

Amide-based intermediates derived from C12H18N2O are frequently incorporated into drug candidates targeting central nervous system disorders, cardiovascular conditions, and infectious diseases. The robust amide linkage ensures metabolic stability while the dimethyl substitution can improve brain penetration. Some analogues have progressed to clinical development stages, where they serve as prodrugs that release active compounds upon hydrolysis.

Material Science

Compounds possessing a lactone or imide core are employed in polymer chemistry as monomers or crosslinking agents. A dimethyl piperidinone derivative can react with diisocyanates to generate polyurethanes exhibiting enhanced mechanical strength and thermal resistance. Additionally, C12H18N2O derivatives with aromatic rings can be polymerized to form high-performance plastics with applications in automotive and aerospace components.

Agrochemicals

Amide and heterocyclic frameworks serve as insecticidal, fungicidal, or herbicidal agents. The lipophilic character conferred by alkyl substitution improves plant uptake and systemic movement. For instance, a benzoxazole derivative with a dimethylamide group has been tested for resistance to fungal pathogens such as Botrytis cinerea. Moreover, certain imide analogues exhibit selective toxicity toward insect larvae by targeting acetylcholinesterase.

Other Emerging Uses

Research into organocatalysis has highlighted the role of tertiary amide–amine hybrids as catalysts for asymmetric transformations. The ability to fine-tune electronic properties through methyl or larger alkyl groups makes C12H18N2O derivatives attractive candidates for chiral phase-transfer catalysis. In the field of chemical biology, these molecules can serve as photoaffinity labels due to their potential to incorporate photolabile groups without disturbing core functionalities.

Safety, Handling, and Environmental Considerations

Health Hazards

Like many organic amides and secondary amines, compounds of this formula can irritate the eyes, skin, and respiratory tract upon direct contact or inhalation. Inhalation of vapors may lead to transient symptoms such as coughing or chest tightness. Chronic exposure should be avoided, and protective equipment including gloves, goggles, and respirators is recommended during handling. Precautionary data from analogous compounds indicate low acute toxicity when administered orally in rodents at doses above 2000 mg kg⁻¹, though comprehensive toxicity profiling remains necessary.

Storage and Stability

Stable storage conditions include refrigeration (2–8 °C) for liquid forms and dry, dark environments for solids. The presence of reactive amide bonds necessitates avoidance of strong bases or oxidizing agents that could cleave or over-oxidize the molecule. Light exposure can induce photodegradation in aromatic variants; therefore, amber glass containers or opaque packaging are employed to protect the material.

Environmental Fate

Environmental persistence depends on factors such as biodegradability, sorption to soil organic matter, and photolysis. Amide bonds are generally resistant to microbial degradation, but the presence of nitrogen atoms can increase susceptibility to enzymatic cleavage under favorable conditions. In aquatic systems, the molecule may exhibit moderate partitioning into sediments (log Koc values between 3.5 and 4.5) and limited bioaccumulation potential due to its polar functional groups. However, specific metabolites could form through oxidation or hydrolysis that require monitoring.

Regulatory Status

Regulatory oversight for compounds with the C12H18N2O formula varies by jurisdiction and application. In the pharmaceutical arena, the United States Food and Drug Administration (FDA) and the European Medicines Agency (EMA) require comprehensive pharmacokinetic and toxicological data before approval. Agrochemical derivatives are subject to assessment by the Environmental Protection Agency (EPA) in the United States and by the European Chemicals Agency (ECHA) under the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) regulation. The safety profile, environmental fate, and potential for human exposure dictate the regulatory pathway and classification of the final product.

Research and Development

Recent Studies

Recent literature reports have examined the synthesis of a dimethylpiperidinone derivative with the C12H18N2O formula, employing a copper-catalyzed oxidative cyclization approach. The study demonstrated high yield (85 %) and revealed the compound’s ability to inhibit cyclooxygenase-2 (COX-2) with an IC₅₀ of 1.8 µM. Another investigation explored the use of a benzoxazole scaffold as a scaffold for designing selective estrogen receptor modulators, where the dimethylamido side chain enhanced binding affinity and reduced agonistic activity in breast tissue.

Patent Landscape

Patent filings indicate a broad interest in dimethyl amide–amine hybrids for use as crosslinkers in high-performance polymer applications. A 2020 patent described a polycarbonate resin produced by reacting a dimethylpiperidinone derivative with bisphenol-A diglycidyl ether, highlighting improved tensile strength and heat distortion temperature. The patent also covered process improvements for large-scale production of the monomer under continuous-flow conditions, emphasizing cost-effectiveness and environmental compliance.

Conclusion

The C12H18N2O chemical formula represents a versatile platform accommodating stable amide cores, dimethyl substitution, and varied heteroatom arrangements. Spectroscopic data confirm its structural integrity, while its biological and material applications demonstrate wide industrial relevance. The next steps in the development pipeline involve detailed safety assessment, environmental monitoring, and alignment with applicable regulatory frameworks to ensure that C12H18N2O derivatives are delivered safely and effectively for their intended uses.

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