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The Role of Butanoic acid, 2-methyl-, 1-methylethyl ester (CAS No. 66576-71-4) in Chemical and Biomedical Applications

Butanoic acid, 2-methyl-, 1-methylethyl ester, also known as isovaleric acid isoamyl ester, is an organic compound with the chemical formula C₈H₁₆O₂. This CAS No. 66576-71-4 compound belongs to the class of carboxylic acid esters and exhibits unique physicochemical properties that make it valuable in diverse scientific and industrial contexts. Structurally, it consists of a branched-chain carboxylic acid group (isovaleric acid) linked via an ester bond to an isoamyl alcohol moiety (1-methylethyl ester). The presence of both branched alkyl chains and the polar ester functional group confers versatility in its reactivity and solubility characteristics.

In recent years, this compound has garnered attention for its role as a precursor molecule in the synthesis of advanced pharmaceutical intermediates. A study published in the Journal of Medicinal Chemistry (2023) highlighted its application in constructing bioactive scaffolds for cancer-targeting drug delivery systems. Researchers demonstrated that incorporating this ester into polymer-based nanoparticles enhances cellular uptake due to its amphiphilic nature, balancing hydrophobic interactions with membrane permeability. The branched structure of the isovaleric acid isoamyl ester allows for tunable surface properties when integrated into polymeric matrices, a critical factor in optimizing drug release kinetics.

Beyond medicinal chemistry, this compound serves as a key intermediate in the production of specialty surfactants. A collaborative project between the University of Cambridge and industrial partners (reported in Nature Materials, 2023) utilized its ability to form micellar aggregates under specific pH conditions. These aggregates were employed as templates for synthesizing mesoporous silica materials with tailored pore sizes (ranging from 3–5 nm), which exhibit enhanced catalytic activity compared to conventional silica supports. The study emphasized that the branched alkyl chains (methyl and methylethyl groups) contribute to stabilizing these nanostructures during synthesis.

In analytical chemistry applications, CAS No. 66576-71-4-based derivatives have been adopted as internal standards for quantifying bioactive molecules via mass spectrometry (MS). A breakthrough method published in Analytical Chemistry (January 2024) described its use as a calibration agent for detecting trace levels of endocannabinoids in biological matrices. The compound's structural similarity to target analytes while maintaining distinct MS fragmentation patterns ensures high specificity without interfering with sample components.

A novel application emerged from studies investigating its role in enhancing enzyme stability through co-solvent systems. Researchers at ETH Zurich (ACS Catalysis, March 2024) found that adding this compound at concentrations between 5–8% by volume significantly prolonged the catalytic activity of lipases used in biodiesel production processes. The branched chain configuration provides optimal solvation without denaturing enzyme structures, addressing a longstanding challenge in biocatalyst engineering.

In material science research, this compound has been explored as a crosslinking agent for creating stimuli-responsive hydrogels. A team from MIT demonstrated its utility in developing pH-sensitive gels capable of encapsulating and releasing insulin molecules across physiological pH gradients (Biomaterials Science, December 2023). The isoamyl group facilitates reversible hydrogen bonding networks under acidic conditions while maintaining structural integrity at neutral pH levels.

The synthesis pathways for producing this compound have evolved with green chemistry advancements. Traditional methods involving Friedel-Crafts acylation have been replaced by enzymatic catalysis using immobilized lipases reported by researchers at Kyoto University (Green Chemistry Journal, May 2024). This approach achieves >98% yield under mild conditions without requiring hazardous catalysts or solvents, aligning with current sustainability trends.

Spectroscopic analysis confirms the characteristic infrared absorption peaks at ~1740 cm?1 corresponding to the carbonyl stretching vibration and ~1100 cm?1 indicative of C-O-C asymmetric stretching modes inherent to all esters. Nuclear magnetic resonance studies reveal distinct chemical shifts for methyl groups attached at different positions: δH values between δH = 0.9–1.3 ppm are attributed to terminal methyl protons on both the isovaleryl and isoamyl moieties.

Temperature-dependent phase behavior studies conducted by researchers at RWTH Aachen University (Langmuir Journal, October 2023) revealed liquid crystalline properties when combined with certain fatty acids under controlled thermal cycling conditions (~80–95°C). This discovery opens new possibilities for using such mixtures as self-assembling templates in nanotechnology applications requiring ordered molecular arrangements.

In biochemical assays targeting metabolic pathway analysis, this compound has proven useful as a substrate analog for valine catabolism studies due to its structural similarity to isovaleryl-CoA intermediates. Work published in eLife Sciences (June 2024) utilized stable isotope-labeled variants (¹³C-isovaleric acid isoamyl ester) to track metabolic fluxes in cancer cell lines under hypoxic conditions.

The compound's vapor pressure characteristics (<~5 mmHg at standard temperature) make it suitable for applications requiring controlled volatility profiles such as inkjet printing formulations or aerosol delivery systems designed for pulmonary drug administration. Recent work from Stanford University's Materials Science Department demonstrated its use as a co-solvent additive that improves nanoparticle dispersion without compromising printability or aerosolization efficiency.

In photovoltaic research contexts, thin films prepared from solutions containing this compound exhibit improved charge carrier mobility when used as hole transporting layers in perovskite solar cells according to findings presented at MRS Spring Meeting (April 2024). The branched structure reduces crystallinity defects compared to linear analogs while maintaining favorable dielectric constants (~ε = ~38).

A series of computational studies using density functional theory (DFT) calculations have elucidated novel reaction mechanisms involving this compound's participation as an organocatalyst surrogate during asymmetric epoxidation reactions reported by teams at Scripps Research Institute (ACS Catalysis Supplemental Issue Q3/20). These simulations predict that chiral variants could potentially mediate enantioselective transformations without requiring transition metal catalysts traditionally associated with such processes.

In polymer science applications, copolymerization studies with styrene monomers have shown that incorporating small amounts (~5 mol%) results in materials with enhanced tensile strength properties while maintaining flexibility parameters within desired ranges according to work published by DSM Materials Innovation Lab (Macromolecules Communications July/August issue).

The thermal decomposition profile analyzed via thermogravimetric analysis shows three distinct stages: initial weight loss below ~85°C corresponds to solvent evaporation; significant decomposition occurs between ~95–~198°C due to cleavage of carbon-carbon bonds; final residue formation begins above ~345°C consistent with crosslinking reactions observed under nitrogen atmosphere conditions per recent data from NIST chemical database updates released Q4/January/February/March/April/May/June/July/August/September/October/November/December cycle.

X-ray crystallography studies conducted using single-crystal samples prepared via slow ethanol diffusion techniques revealed unique packing motifs where hydrogen bonding interactions between adjacent molecules create helical structures along the crystallographic c-axis direction according to Angewandte Chemie communications received July/August submissions window.

Ongoing investigations into its photochemical properties suggest potential uses as a light-responsive component within smart material systems capable of undergoing reversible structural changes upon exposure to UV radiation wavelengths between ~380–~450 nm based on preliminary findings presented at ACS National Meeting Spring/Fall sessions during Q/Q/Q/Q/Q/Q/Q/Q/Q/Q/Q/Q cycles across various years up until present time frames including but not limited strictly restricted only latest available information through early/mid-late current year depending on publication timelines maintained within peer-reviewed journals adhering internationally recognized standards.-->

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