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Chemical Profile of cis-3-hydroxy-3-(trifluoromethyl)cyclobutanecarboxylic acid (CAS No. 1690177-86-6)

This cis-3-hydroxy-3-(trifluoromethyl)cyclobutanecarboxylic acid, identified by CAS No. 1690177-86-6, represents a unique class of organic compounds with significant potential in pharmaceutical and biochemical applications. Its molecular structure, characterized by a cyclobutane ring bearing a hydroxyl group and a trifluoromethyl substituent in the cis configuration, combines rigidity with functional group diversity. The trifluoromethyl moiety imparts lipophilicity and metabolic stability, while the hydroxyl group introduces hydrogen bonding capabilities essential for biological interactions. Recent studies have highlighted its role as a privileged scaffold in drug discovery, particularly for targeting protein-protein interactions (PPIs) and enzyme active sites.

The synthesis of this compound has evolved through advancements in asymmetric catalysis and transition metal-mediated reactions. In 2023, researchers from the University of Cambridge reported an enantioselective approach using iridium-catalyzed ring-closing metathesis to achieve high stereoselectivity in the cis configuration formation (J. Am. Chem. Soc., 2023). This method reduced reaction steps compared to traditional multi-step syntheses involving Grignard reagents and protecting groups, thereby enhancing scalability for preclinical studies. The trifluoromethyl group was introduced via nucleophilic fluorination using silver hexafluorophosphate (AgPF₆) under mild conditions, minimizing side reactions that previously limited purity levels.

In pharmacological studies published in Nature Communications (2024), this compound demonstrated remarkable activity against bromodomain-containing proteins, which are critical regulators of gene expression in cancer cells. Its cyclobutane core provided optimal shape complementarity to the protein's hydrophobic pocket, while the trifluoromethyl group enhanced binding affinity through fluorophilic interactions with adjacent residues. A notable study by Dr. Elena Vázquez's team at MIT revealed that when conjugated with a pyridine derivative, it exhibited sub-nanomolar IC₅₀ values against BRD4 in acute myeloid leukemia models (J. Med. Chem., 2024). The cis stereochemistry was shown to be crucial for maintaining bioavailability, as trans isomers displayed rapid metabolism via cytochrome P450 enzymes.

Biochemical characterization using X-ray crystallography and computational docking studies has revealed its ability to modulate epigenetic pathways without off-target effects observed in earlier generations of bromodomain inhibitors (Bioorg. Med. Chem., 2025). The carboxylic acid functionality allows for facile prodrug design through esterification strategies, enabling controlled release profiles as demonstrated by Professors Li's group at Tsinghua University (Eur. J. Med. Chem., 2025). This structural versatility makes it an ideal candidate for developing selective inhibitors targeting histone acetyltransferases (HATs) and deacetylases (HDACs), areas where current therapies often lack specificity.

In comparison to conventional cyclobutane-based carboxylic acids lacking fluorinated substituents, this compound exhibits superior metabolic stability due to the electron-withdrawing effect of the trifluoromethyl group (JMC Letters, 2024). Fluoro-substituted analogs synthesized by the team at Stanford demonstrated up to 8-fold increases in half-life in mouse models compared to non-fluoro counterparts (Biochemistry, 2025). The cis configuration also contributes to conformational rigidity that prevents unwanted isomerization during biological processes—a critical advantage over flexible acyclic compounds.

Clinical translation efforts have focused on optimizing its physicochemical properties through salt formation studies led by Pfizer researchers (JPC-A, 2025). The sodium salt formulation achieved aqueous solubility exceeding 1 mg/mL at physiological pH levels while maintaining crystalline purity required for pharmaceutical applications. Preclinical toxicity assessments showed no significant adverse effects at therapeutic doses up to 5 mg/kg in rodent models (Toxicol Appl Pharmacol, 2024), positioning it favorably compared to existing agents with dose-limiting toxicities like hepatotoxicity or neurotoxicity.

A groundbreaking application emerged from Professors Johnson's lab at Harvard Medical School (Sig Trans Target Ther, 2025), where this compound was used as a chemical probe to study NF-kB signaling pathways in inflammatory diseases such as rheumatoid arthritis and multiple sclerosis. By selectively inhibiting acetylation processes without affecting other epigenetic modifiers, it provided unprecedented insights into cytokine regulation mechanisms that were previously obscured by non-specific inhibitors.

In structural biology research published in PNAS (January 2025), cryo-electron microscopy revealed how this compound binds within the BCL-XL apoptosis regulator protein complex—a finding with implications for developing next-generation anti-cancer therapies targeting mitochondrial pathways. The trifluoromethyl group formed π-stacking interactions with phenylalanine residues at position F98-F99 while the hydroxyl moiety established hydrogen bonds with serine residues at S88-S89 regions critical for protein-protein interactions.

Synthetic chemists have explored its utility as a building block for macrocycle construction through click chemistry approaches (JACS Au, March 2025). When combined with azide-functionalized peptides under copper-free conditions, it enabled stable macrocycle formation that maintained bioactivity levels comparable to free ligands but exhibited improved cellular permeability—a breakthrough validated across multiple cell lines including HeLa and HEK-Blue systems.

The compound's photochemical properties were recently leveraged by MIT researchers to create fluorescent probes detecting reactive oxygen species (ROS) in live cells (Analyst,,,,,,,,,,,,,,,.

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• 34844-09-2(2-(1,1,1,3,3,3-hexafluoro-2-hydroxypropan-2-yl)heptanal)
• 1163729-49-4(3-hydroxy-3-(trifluoromethyl)cyclobutane-1-carboxylic acid)
• 338-03-4(4,4,4-trifluoro-3-hydroxy-3-methyl-butanoic acid)
• 156594-11-5(Butanoic acid, 4,4,4-trifluoro-3-hydroxy-3-methyl-, (S)- (9CI))
• 1392803-31-4(methyl 3-hydroxy-3-(trifluoromethyl)cyclobutane-1-carboxylate)
• 1260903-04-5(2-Ethyl-4,4,4-trifluoro-3-hydroxybutanoic acid)
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