• 1. Novel fungicidal phenylethanol derivatives linking a trifluoromethyl pyrazole pharmacophore: design, synthesis, crystal structure, and biology evaluation
  Lang Tai,Sheng-Xin Sun,Kai Yue,Jian-Qi Chai,Shuai-Tao Hou,Guang-Yu Dai,Chun-Long Yang,Min Chen New J. Chem. 2023 47 12850
• 2. Synthesis and antiplasmodial evaluation of aziridine–(iso)quinoline hybrids and their ring-opening products
  Stéphanie Vandekerckhove,Sofie De Moor,Dries Segers,Carmen de Kock,Peter J. Smith,Kelly Chibale,Norbert De Kimpe,Matthias D'hooghe Med. Chem. Commun. 2013 4 724

Introduction to 1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol (CAS No: 122431-37-2)

1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol, identified by its Chemical Abstracts Service (CAS) number 122431-37-2, is a heterocyclic compound that has garnered significant attention in the field of pharmaceutical and medicinal chemistry due to its unique structural and functional properties. This compound belongs to the pyrazole class, which is well-documented for its broad spectrum of biological activities and therapeutic potential. The presence of both a methyl group at the 1-position and a trifluoromethyl group at the 3-position, along with a hydroxyl group at the 5-position, imparts distinct electronic and steric characteristics that make it a valuable scaffold for drug discovery and development.

The trifluoromethyl group is particularly noteworthy in medicinal chemistry, as it is known to enhance metabolic stability, improve binding affinity, and modulate pharmacokinetic profiles of small molecule drugs. This feature has been extensively exploited in the design of bioactive molecules targeting various diseases, including cancer, inflammation, and infectious disorders. The hydroxyl functionality at the 5-position of the pyrazole ring further contributes to the compound's reactivity and potential for further derivatization, enabling the synthesis of a diverse array of analogs with tailored biological properties.

In recent years, there has been a surge in research focused on developing novel therapeutic agents based on pyrazole derivatives. The structural motif of 1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol has been investigated for its potential as an intermediate in the synthesis of kinase inhibitors, antiviral agents, and anti-inflammatory compounds. For instance, studies have demonstrated its utility in generating inhibitors targeting Janus kinases (JAKs), which play a crucial role in immune regulation and are implicated in various autoimmune diseases. The methyl substituent at the 1-position appears to facilitate optimal positioning within the active site of these enzymes, enhancing interactions with critical residues.

Moreover, the fluorinated pyrazole core has shown promise in overcoming drug resistance mechanisms associated with viral infections. Researchers have leveraged the electron-withdrawing nature of the trifluoromethyl group to improve binding interactions with viral proteases and polymerases. Preliminary computational studies suggest that this compound can effectively disrupt viral replication cycles by inhibiting key enzymatic steps. These findings align with broader trends in antiviral drug development, where fluorinated heterocycles are increasingly recognized for their ability to enhance drug efficacy and selectivity.

The hydroxylated pyrazole derivative also exhibits interesting pharmacokinetic properties. The presence of the hydroxyl group not only influences solubility but also opens avenues for conjugation with other functional groups or biomolecules, facilitating prodrug strategies or targeted delivery systems. Such modifications are essential for improving bioavailability and reducing off-target effects, which are critical considerations in modern drug design. Recent advances in prodrug technology have highlighted the potential of incorporating hydroxyl-containing heterocycles into molecular constructs designed for enhanced cellular uptake or tissue-specific localization.

From a synthetic chemistry perspective, 1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol serves as a versatile building block for constructing more complex scaffolds. Transition-metal-catalyzed cross-coupling reactions, such as Suzuki-Miyaura or Buchwald-Hartwig couplings, can be employed to introduce aryl or heteroaryl groups at various positions around the pyrazole ring. Additionally, palladium-catalyzed hydrogenation or oxidation reactions offer pathways to modulate electron density and reactivity. These synthetic strategies have been instrumental in generating libraries of derivatives for high-throughput screening (HTS), enabling rapid identification of lead compounds with desired pharmacological profiles.

The growing interest in fluorinated compounds has also spurred innovation in synthetic methodologies tailored to introducing trifluoromethyl groups efficiently and selectively. Reagents such as trifluoromethanesulfonate esters or organometallic intermediates derived from trifluoroacetic acid derivatives have become indispensable tools in fluorine chemistry. By integrating these reagents into multi-step syntheses of 1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol, chemists can achieve high yields while maintaining regioselectivity—a critical factor when dealing with polycyclic systems like pyrazoles.

In conclusion, 1-Methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol (CAS No: 122431-37-2) represents a compelling example of how structural modifications within a heterocyclic framework can yield compounds with significant therapeutic potential. Its unique combination of substituents—methyl, trifluoromethyl, and hydroxyl"—provides a rich foundation for medicinal chemists to explore new drug targets and develop innovative treatment strategies across multiple disease areas. As research continues to uncover novel applications for this compound and its derivatives, it is poised to remain a cornerstone of pharmaceutical innovation in the coming years.

• 447401-86-7
• 190365-92-5(1H-Pyrazol-5-yloxy, 1,3-dimethyl-)
• 143706-76-7(1H-Pyrazol-5-ol, 1-propyl-3-(trifluoromethyl)-)
• 2060052-60-8(4-amino-1-methyl-3-(trifluoromethyl)-1H-pyrazol-5-ol)
• 1359829-27-8(1H-Pyrazole, 5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)-)
• 143706-77-8(1-Isopropyl-3-(trifluoromethyl)-1H-pyrazol-5-ol)
• 676487-71-1(1H-Pyrazole, 5-ethoxy-1-methyl-3-(trifluoromethyl)-)
• 122431-43-0(1H-Pyrazol-5-ol, 4-bromo-1-methyl-3-(trifluoromethyl)-)
• 143706-78-9(1H-Pyrazol-5-ol, 1-butyl-3-(trifluoromethyl)-)
• 143706-80-3(1-(2-hydroxyethyl)-3-(trifluoromethyl)-1H-pyrazol-5-ol)