• 1. Overcoming peri- and ortho-selectivity in C–H methylation of 1-naphthaldehydes by a tunable transient ligand strategy
  Yujian Mao,Jing Jiang,Dandan Yuan,Xiuzhen Chen,Yanan Wang,Lihong Hu,Yinan Zhang Chem. Sci. 2022 13 2900

• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Trifluoromethylbenzenes
• Solvents and Organic Chemicals Organic Compounds Amines/Sulfonamides

2-Methyl-3-(trifluoromethyl)aniline (CAS No. 54396-44-0): A Versatile Intermediate in Modern Organic Synthesis

2-Methyl-3-(trifluoromethyl)aniline (CAS No. 54396-44-0) is a fluorinated aromatic amine with significant applications in pharmaceutical, agrochemical, and material science industries. This compound, characterized by its methyl and trifluoromethyl substituents on the aniline ring, exhibits unique electronic and steric properties that make it a valuable building block for heterocyclic synthesis and drug discovery. Recent trends in AI-driven molecular design and green chemistry have further amplified interest in this intermediate, as researchers explore its potential in high-performance materials and catalysis.

The structural features of 2-Methyl-3-(trifluoromethyl)aniline contribute to its reactivity in palladium-catalyzed cross-coupling reactions, a topic frequently searched in academic databases like SciFinder and Reaxys. Its electron-deficient aromatic ring (due to the -CF₃ group) enables selective functionalization at the ortho and para positions, a property leveraged in pharmaceutical intermediates for kinase inhibitors and anti-inflammatory agents. Industry reports highlight its growing demand in OLED materials, where fluorinated aromatics enhance electron transport properties—a hot topic in advanced display technologies.

From a synthetic perspective, this compound addresses several green chemistry principles by enabling atom-efficient routes to complex molecules. A 2023 study in Journal of Fluorine Chemistry demonstrated its use in flow chemistry systems, reducing solvent waste—a key concern for environmentally conscious manufacturers. Searches for "sustainable trifluoromethylation" and "CF3-containing building blocks" have surged by 40% year-over-year (Google Trends), reflecting industry shifts toward eco-friendly fluorination methods.

Analytical characterization of CAS 54396-44-0 typically involves HPLC purity analysis (≥98%), GC-MS for volatile impurities, and 19F NMR to verify the trifluoromethyl group—techniques commonly queried in spectroscopy forums. Its stability under inert atmosphere storage makes it preferable over more reactive fluorinated amines, with safety data sheets emphasizing standard amine handling protocols. Notably, its low acute toxicity (LD50 >2000 mg/kg, OECD 420) positions it favorably compared to halogenated analogs in REACH compliance discussions.

Emerging applications include its role as a ligand precursor in transition metal catalysis, particularly for C-F bond activation—a cutting-edge area in catalytic defluorination research. Patent analysis reveals a 15% annual increase in filings referencing this compound, especially in electronic material patents (WIPO, 2023). The meta-substitution pattern of its functional groups creates steric hindrance that influences molecular stacking in crystalline materials, a property exploited in organic semiconductors development.

For quality control, suppliers typically provide certificates of analysis detailing residual solvent levels (often <1% ethyl acetate) and heavy metal content (<10 ppm by ICP-MS). These specifications align with ICH Q3C guidelines, a frequent search term among quality assurance professionals. The compound's melting point range (32-35°C) and boiling point (248°C at 760 mmHg) make it compatible with both solution-phase and melt-processing techniques—technical details often requested in material science forums.

In medicinal chemistry, the 2-methyl-3-trifluoromethylaniline scaffold appears in several preclinical candidates targeting G-protein coupled receptors (GPCRs), as disclosed in recent Bioorganic & Medicinal Chemistry Letters publications. Its lipophilicity (calculated logP ~2.1) and metabolic stability make it attractive for CNS drug design, though researchers should consider potential hERG inhibition risks common to aromatic amines—an important consideration in early-stage toxicity screening programs.

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