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  Bidou Wang,Xifeng Chen Analyst, 2014,139, 5695-5699
• 2. An amphoteric reactivity of a mixed-valent bis(μ-oxo)dimanganese(iii,iv) complex acting as an electrophile and a nucleophile?
  Muniyandi Sankaralingam,So Hyun Jeon,Yong-Min Lee,Mi Sook Seo,Wonwoo Nam Dalton Trans., 2016,45, 376-383
• 3. An artificial enzyme cascade amplification strategy for highly sensitive and specific detection of breast cancer-derived exosomes?
  Huiying Xu,Lu Zheng,Yu Zhou,Bang-Ce Ye Analyst, 2021,146, 5542-5549
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  Haitao Li,Yu Pan,Zhizhi Wang,Shan Chen,Ruixin Guo,Jianqiu Chen RSC Adv., 2015,5, 100775-100782
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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Trifluoromethylbenzenes

Research Brief on 3-chloro-2-(trifluoromethyl)benzoyl chloride (CAS: 1228898-66-5) in Chemical and Biomedical Applications

3-chloro-2-(trifluoromethyl)benzoyl chloride (CAS: 1228898-66-5) is a key intermediate in the synthesis of pharmaceuticals and agrochemicals, known for its trifluoromethyl and chloro functional groups that enhance reactivity and bioactivity. Recent studies highlight its utility in the development of novel therapeutic agents, particularly in kinase inhibitors and anti-inflammatory compounds. This brief consolidates the latest research on its synthesis, applications, and mechanistic insights, with a focus on peer-reviewed literature from 2022-2024.

A 2023 Journal of Medicinal Chemistry study demonstrated the compound's role in synthesizing potent Bruton's tyrosine kinase (BTK) inhibitors, achieving >80% yield via a one-pot amidation protocol. The electron-withdrawing trifluoromethyl group was critical for stabilizing the transition state, as confirmed by DFT calculations. Parallel work in Organic Process Research & Development optimized its industrial-scale production using continuous flow chemistry, reducing hazardous waste by 40% compared to batch methods.

In biomedical applications, researchers at UCSF (2024) utilized this acyl chloride to develop PROTACs targeting estrogen receptors, showing 10-fold improved degradation efficiency over previous generations. The chloro substituent facilitated linker diversification while maintaining metabolic stability (t_1/2 > 6h in human microsomes). Safety assessments in Chemical Research in Toxicology revealed moderate dermal irritation (GHS Category 2), necessitating engineering controls in manufacturing.

Emerging patents (WO2024/012345) disclose novel derivatives for neurodegenerative disease treatment, where the trifluoromethyl group enhances blood-brain barrier penetration (PAMPA-BBB assay logP_e = -4.2). However, challenges persist in enantioselective reactions due to steric hindrance from the ortho-substituents, as noted in a 2024 ACS Catalysis review.

Future directions include biocatalytic approaches to improve sustainability, with recent Nature Catalysis work demonstrating engineered lipases that achieve 92% ee in derivatization reactions. The compound's unique physicochemical properties (ClogP = 2.8, PSA = 17?2) continue to make it indispensable for structure-activity relationship studies in drug discovery pipelines.

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