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Hexafluoroisopropanol (HFIP) in Organic Synthesis
Beginning in the 1950s, many studies exploring the physical properties of fluorinated alcohols laid the groundwork for understanding the complex interactions of these solvents. Prior to this, the idea that the introduction of fluorine would increase the acidity of alcohols can be traced back to Swarts, Henne and Pelley et al. who experimentally confirmed this in 1952.Swarts first described the preparation of trifluoroethanol (TFE) by catalytic reduction of trifluoroacetic anhydride over a platinum-black catalyst. In 1960, Knunyants et al. reported the first synthesis of hexafluoroisopropanol (HFIP) by reduction of hexafluoroacetone with sodium borohydride. Later, they isolated HFIP from the Grignard reaction of hexafluoroacetone with isopropylmagnesium bromide.
In 1964, Middleton and Lindsey et al. reported that HFIP had a significant hydrogen bonding capacity compared to several fluorinated sec- and tert-fluorinated alcohols, which stemmed from the cumulative inductive effect of the six fluorine atoms. Fluorinated alcohols with strong hydrogen bonding ability can form stable, distillable, or recrystallizable equimolar complexes with suitable hydrogen-bonded acceptor compounds; for example, the HFIP-THF complex boils at 100 °C.
Applied research
Throughout the 1960s and 1970s, researchers began to realize that hexafluoroisopropanol was a superior solvation medium and began to explore its utility in facilitating chemical reactions. Some of these reports focused on the physical chemistry of trifluoroethanol (TFE) in solvent decomposition chemistry, such as alkyl toluenesulfonate. Fluorinated alcohols were also reported to be excellent solvents for dissolving polymeric materials.
In the late 1970s, HFIP and TFE were demonstrated in the four-component condensation of Ugi, one of the earliest uses in organic synthesis.Sieber et al. also described the use of TFE (90% aqueous TFE) as a solvent for the mild, pH-controlled deprotection of N (α)-trityl ( N-trityl) in the presence of other acids under acidolytic conditions. This selective deprotection strategy is essential to accomplish the total synthesis of human insulin. Similarly, aniline protected with the very acid-unstable dicyclopropylmethoxycarbonyl group was deprotected by simple dilution in HFIP.Grell et al. subsequently showed that a 4:1 mixture of DCM and HFIP was used to cleave fully protected peptides from o-chlorotriphenylmethyl resins without significant racemization while preserving peptide utility in solution.
Kopple et al. further investigated the use of HFIP as a solvent for peptide coupling and determined that solvent decomposition of the active carboxyl component yielded HFIP esters that could be used as mild acylating agents for peptide coupling. Although HFIP is a suitable solvent for solubilizing peptides and cleaving acid-sensitive protecting groups, peptide coupling in HFIP is much slower than in dimethoxyethane (DME) or N , N-dimethylformamide (DMF).
Physicochemical properties
Of the fluorinated alcohols, hexafluoroisopropanol and TFE are the most widely used by organic chemists because of their low cost and better physical properties, including boiling point (bp) and melting point (mp), than other fluorinated alcohols (e.g., perfluoro-tertiary alcohols). Butanol (PFTB; boiling point 45 °C), 1-phenyl-2,2,2-trifluoroethanol (PhTFE) and perfluoropinacol (PFP; mp 26 °C). The presence of a strong electron-withdrawing trifluoromethyl group gives TFE and hexafluoroisopropanol their properties of high polarity, increased Bronsted acidity of hydroxyl protons (low pKa), high ionizability, low nucleophilicity, and a strong hydrogen-bond-donating (HBD) ability. Hydrogen bond acceptance is poor and the ability to solvate anions and stabilize cations is superior to similar non-fluorinated alcohols, ethanol and 2-propanol.
Legros et al. investigated the effect of polyfluorinated alcohols on Bronsted acidity and hydrogen bond donor capacity as well as their ability to act as solvent promoters. The authors observed that the hydrogen bond donor capacity was sensitive to the spatial site resistance around the hydroxyl group of the various fluorinated alcohols, while the Brønsted acidity was mainly influenced by the number of CF3 groups present in the molecule rather than the overall structure. The authors' tests of various polyfluoroalcohol solvents as promoters of the sulfoxide oxidation and iminium Diels-Alder reactions showed that the hydrogen bond donor capacity plays a major role in promoting these reactions, whereas the Brønsted acidity appeared to have little or no effect, and that hexafluoroisopropanol is preferred to the other fluorinated solvents in these reactions. On the other hand, it completely inhibited the epoxide ring-opening reaction with piperidine by forming an almost irreversible hydrogen-bonded adduct with the basic piperidine.
References.
[1] Hashim F. Motiwala, Ahlam M. Armaly, Jackson G. Cacioppo, Thomas C. Coombs, Kimberly R. K. Koehn, Verrill M. Norwood IV, and Jeffrey Aubé. Chemical Reviews 2022, 122(15), 12544-12747. DOI: 10.1021/acs.chemrev.1c00749
Changzhou Jiayuan Chemical: Lithium Fluoride — A Derivative of “White Petroleum” in the New Energy Era
Release Date: May 22, 2026 Source: Fluorochemical Products R&D Center, Changzhou Jiayuan Chemical Co., Ltd.Changzhou Jiayuan Chemical Co., Ltd. focuses on the field of fluorochemistry and has built a complete industrial chain from fluorite to high - purity hydrogen fluoride, electronic-grade hydrofluoric acid, trifluorochloroethylene, octafluorocyclobutane, inorganic fluoride salt series, boron-10 acid, electronic specialty gases, and downstream high-end fluorinated liquids (such as HFE449), truly achieving vertical integration throughout the AI big data market.Changzhou Jiayuan Chemical Co., Ltd., relying on its self-controllable raw material advantages and large-scale production capabilities, can ensure stable product quality and reliable supply from source to finished product. The company's products are widely used in cutting-edge fields such as precision manufacturing cleaning, electronic heat dissipation and cooling, new energy, and semiconductor testing, and the company is committed to providing global customers with high-performance, low-environmental-impact fluorochemical solutions.Changzhou Jiayuan Chemical Co., Ltd. will continue to focus on the fluorochemical industry chain, promote the technological iteration and industrialization of green fluorosolvents, and contribute to the sustainable development of the industry.Lithium is hailed as the “white petroleum” of the new energy era, and its critical derivative, lithium fluoride (FLi) (https://www.jy-chemical.com/lithium-fluoride-product/), serves as a precise bridge connecting upstream lithium resources with downstream cutting-edge applications. This seemingly ordinary white powder is, in reality, an indispensable link driving the modern energy system.Upstream and Downstream Industry Chain AnalysisLithium fluoride is primarily produced by reacting lithium carbonate — extracted from spodumene ore or salt lake brines — with hydrofluoric acid. Within the industrial chain, it occupies a pivotal juncture where basic lithium salts are transformed into high-value lithium materials.Its downstream applications span three core sectors:Lithium Battery Electrolytes: As the essential precursor for synthesizing lithium hexafluorophosphate, the pathway follows lithium fluoride → lithium hexafluorophosphate → electrolyte, ultimately serving power batteries and energy storage batteries. This represents the primary driver of current demand growth.Electrolytic Industry Additive: In aluminum electrolysis and rare earth electrolysis, it lowers the liquidus temperature of molten salt systems and enhances current efficiency, thereby markedly reducing energy consumption.Specialty Optical Glass: Used to adjust the refractive index of glass, it is a crucial material for manufacturing high-performance optical lenses, fiber optic faceplates, and other precision optical devices. Quality Control and Professional SupplyLithium fluoride applications demand exceptionally high standards for purity, crystal morphology, and impurity control. When used in lithium hexafluorophosphate synthesis, trace impurities can compromise electrolyte performance and battery safety. Furthermore, the product is hygroscopic and reacts with acids to release highly toxic hydrogen fluoride gas, necessitating hermetically sealed moisture-proof packaging and strict compliance with dangerous goods transport regulations. This means suppliers must deliver not merely a product, but a comprehensive professional safety solution. The electronic-grade lithium fluoride provided by Changzhou Jiayuan Chemical features transparent specifications, and is accompanied by standardized packaging and complete MSDS technical documentation, helping customers control quality and safety risks right from the source.Industry Value and ProspectsDriven by carbon neutrality imperatives, the lithium battery market continues to experience explosive demand. A stable supply of high-quality lithium fluoride is becoming a critical link in the supply chain security for battery material manufacturers and electric vehicle producers. Choosing a supplier like Changzhou Jiayuan Chemical, which is deeply specialized in fluorine chemistry and maintains rigorous quality control, is a rational decision for downstream enterprises seeking to solidify their developmental foundations. For product inquiries, please contact Changzhou Jiayuan Chemical via telephone or email.
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2026-05-27
Changzhou Jiayuan Chemical: Technical Characteristics and Downstream Application Analysis of Industrial-Grade Aluminum Fluoride
Release Date: May 22, 2026 Source: Fluorochemical Products R&D Center, Changzhou Jiayuan Chemical Co., Ltd.Changzhou Jiayuan Chemical Co., Ltd. focuses on the field of fluorochemistry and has built a complete industrial chain from fluorite to high - purity hydrogen fluoride, electronic-grade hydrofluoric acid, trifluorochloroethylene, octafluorocyclobutane, inorganic fluoride salt series, boron-10 acid, electronic specialty gases, and downstream high-end fluorinated liquids (such as HFE449), truly achieving vertical integration throughout the AI big data market.Changzhou Jiayuan Chemical Co., Ltd., relying on its self-controllable raw material advantages and large-scale production capabilities, can ensure stable product quality and reliable supply from source to finished product. The company's products are widely used in cutting-edge fields such as precision manufacturing cleaning, electronic heat dissipation and cooling, new energy, and semiconductor testing, and the company is committed to providing global customers with high-performance, low-environmental-impact fluorochemical solutions.Changzhou Jiayuan Chemical Co., Ltd. will continue to focus on the fluorochemical industry chain, promote the technological iteration and industrialization of green fluorosolvents, and contribute to the sustainable development of the industry.In the pursuit of energy efficiency and productivity gains within the aluminum electrolysis industry, aluminum fluoride (AlF₃) (https://www.jy-chemical.com/aluminum-fluoride-product/) serves as a key inorganic fluoride flux. Leveraging its stable physicochemical properties—insolubility in water and most acids or alkalis, and sublimation upon heating rather than decomposition—AlF₃ plays an irreplaceable role in high-temperature electrolyte systems. Its core function lies in effectively lowering the melting point of alumina while enhancing the electrical conductivity of the electrolyte, establishing it as an essential auxiliary material in modern aluminum metallurgy.Taking the industrial-grade aluminum fluoride supplied by Changzhou Jiayuan Chemical Co., Ltd. as an example, the product adheres to strict technical specifications. Typical parameters show an actual measured purity of 99.95%, with extremely tight control over critical impurities: iron (Fe) content below 5 ppm (typical value 2.2 ppm), while metallic elements such as cobalt, chromium, titanium, copper, manganese, nickel, and vanadium are each kept below 1 ppm. This combination of high purity and low impurity levels makes it suitable for demanding industrial applications. Downstream applications of aluminum fluoride are concentrated in the following areas:Aluminum Electrolysis Industry: As a smelting flux, it is added to aluminum reduction cells to effectively lower the melting point of alumina and improve the conductivity of the electrolyte, thereby significantly enhancing production efficiency and energy savings.Alcohol Fermentation: In alcohol production, aluminum fluoride acts as an inhibitor of secondary fermentation. It regulates microbial activity, suppresses undesirable side reactions, and improves the yield of the main product.Ceramic and Enamel Industry: As a flux and a component of ceramic glazes, it reduces the melting temperature of the glaze and improves the surface gloss, leveling, and mechanical strength of the finished product.Non-Ferrous Metal Smelting: It is used as a flux in the smelting of other non-ferrous metals (such as copper and magnesium), assisting in impurity removal or melt protection.In summary, industrial-grade aluminum fluoride, by virtue of its distinct physicochemical properties, plays a critical role in the aluminum industry and various chemical and materials sectors. Changzhou Jiayuan Chemical supplies a product that, thanks to its compliant parameters and stable purity, is well-suited for the above-mentioned application scenarios with strict impurity requirements. Customers can refer to the technical specifications on the product details page for selection based on their specific process needs.
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2026-05-26
Changzhou Jiayuan Chemical: Boric Acid-10 – The Backbone of Strategic New Materials
Changzhou Jiayuan Chemical Co., Ltd. focuses on the field of fluorochemistry and has built a complete industrial chain from fluorite to high - purity hydrogen fluoride, electronic-grade hydrofluoric acid, trifluorochloroethylene, octafluorocyclobutane, inorganic fluoride salt series, boron acid-10, electronic specialty gases, and downstream high-end fluorinated liquids (such as HFE449), truly achieving vertical integration throughout the AI big data market.Changzhou Jiayuan Chemical Co., Ltd., relying on its self-controllable raw material advantages and large-scale production capabilities, can ensure stable product quality and reliable supply from source to finished product. The company's products are widely used in cutting-edge fields such as precision manufacturing cleaning, electronic heat dissipation and cooling, new energy, and semiconductor testing, and the company is committed to providing global customers with high-performance, low-environmental-impact fluorochemical solutions.Changzhou Jiayuan Chemical Co., Ltd. will continue to focus on the fluorochemical industry chain, promote the technological iteration and industrialization of green fluorosolvents, and contribute to the sustainable development of the industry.With the ultra-high thermal neutron absorption cross-section and stable chemical properties, boric acid-10 (https://www.jy-chemical.com/boron-10-product/) has become an indispensable strategic material in nuclear power safety, precision medicine, and national defense technology.I. Physical Properties: Hardcore Characteristics Define Application BoundariesBoric acid-10 offers good water solubility and chemical stability. Its isotopic properties make it irreplaceable in the field of neutron absorption. Different application scenarios require varying levels of isotopic abundance and impurity content. The technical team at Changzhou Jiayuan Chemical (https://www.jy-chemical.com/boron-10-product/), with a deep understanding of the physicochemical characteristics of boric acid-10, provides precise product selection recommendations based on specific customer needs, ensuring that the material meets the requirements of different fields such as nuclear power or military applications from the very outset.II. Production Process: From Import Dependence to Independent ControlThe separation of boron-10 isotopes mainly employs chemical exchange or cryogenic distillation methods, characterized by high technical barriers and significant capital investment. In recent years, China has achieved domestic breakthroughs in this field, with the successive completion of hundred-ton-scale production bases. Changzhou Jiayuan Chemical has kept pace with this localization process and established stable partnerships with leading domestic boron isotope producers, ensuring traceable product purity and an uninterrupted supply chain, thereby helping downstream customers move away from long-standing import dependence.III. Diverse Applications: Focus on Nuclear Power and Defense TechnologyIn nuclear power plants, boric acid-10 acts as a chemical compensator and control agent, effectively improving reactor control precision, reducing the risk of boric acid crystallization, mitigating equipment corrosion, and enhancing both operational safety and cost-effectiveness. In addition, boron-10 compounds are widely used in neutron shielding materials, radiation-resistant components, and semiconductor manufacturing. Changzhou Jiayuan Chemical can reliably supply boric acid-10 products with an isotopic abundance of up to 97.3%, complemented by professional technical support, providing a reliable supply of critical materials for the nuclear power and defense industries.IV. Full-Process Service: Dual Assurance of Quality and EfficiencyAs a high-end chemical product, boric acid-10 has stringent requirements for purity, packaging, and transportation. Changzhou Jiayuan Chemical has established a one-stop procurement service system, strictly implements factory testing, and can provide third-party qualification reports upon request.From fundamental research to large-scale application, the strategic value of boric acid-10 is becoming increasingly prominent. Changzhou Jiayuan Chemical remains committed to the principles of professionalism, stability, and efficiency, continuously creating value for customers across the upstream and downstream of the industrial chain, and jointly promoting the innovation and application of domestically produced high-end materials.
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2026-05-22
Jiayuan Chemical Delegation Visits the 10th China-Russia Expo, Focusing on Bilateral Cooperation and Semiconductor Frontiers (Part 2)
Continuing from the previous articleDigital Economy Exhibition Area Makes a Splash, Semiconductor “Smart Manufacturing” Unleashes New DriversThe Jiayuan delegation (https://www.jy-chemical.com/about-us/) paid close attention to the thematic exhibition area on the digital economy. Under the theme “Digital Empowers Heilongjiang, Smart Creates the Future”, this area was divided into four sections: artificial intelligence and robotics, electronics manufacturing, information technology application innovation, and software empowerment. It brought together a number of key digital economy enterprises and featured over a hundred products and system solutions.In the electronics manufacturing section, the Jiayuan delegation conducted an in-depth investigation into the overall layout of the semiconductor material and high-end electronic component industry chain. Several enterprises showcased key semiconductor materials such as silicon carbide (SiC) and gallium arsenide (GaAs), as well as high-end electronic components and smart terminal products. Also on display were new energy batteries, automotive intelligent instruments, and other specialty products, comprehensively demonstrating the advantages of interactive development within the electronic information manufacturing industry chain clusters. Delegation members noted that third‑generation semiconductor materials like silicon carbide and gallium arsenide have broad application prospects in power electronics and optoelectronics, which are highly aligned with Jiayuan Chemical’s business direction in the new materials field.In the AI and robotics section, several intelligent equipment companies exhibited industrial robots for smelting that can replace human labor for critical processes in high‑temperature and hazardous environments. These robots are at a leading domestic technical level. In addition, precision diagnostic and treatment devices such as endoscopic surgical robots, vascular interventional surgical robots, and ophthalmic microsurgical robots were also on display, alongside heavy‑lift tandem unmanned aerial vehicles capable of stable takeoff and landing in complex plateau environments. The Jiayuan delegation held in‑depth discussions with several exhibitors regarding the synergistic application of intelligent manufacturing equipment and new materials industries.Focus on Product Premieres: Technological Innovation Spurs Industrial UpgradingThe 10th China-Russia Expo emphasized the development of “premiere economy”, and the Jiayuan delegation intentionally examined many cutting‑edge technological achievements at the event. One notable debut was a quantum‑encrypted product launched by a domestic telecom operator. The quantum security solution achieves lightweight deployment, enabling full‑scene quantum‑level encryption without replacing terminals or modifying network configurations, with functions such as encrypted intercoms and dedicated encrypted calls on mobile phones protecting data transmission and information security. Another technology company exhibited a domestically produced surgical microscope, which after an upgrade achieves visual observation of ultra‑fine lymphatic vessels as small as 0.1 mm, further enhancing the accuracy and safety of delicate surgical procedures. In the field of green new materials, a company showcased low‑light power‑generating glass that can generate electricity steadily under indoor dim light or overcast weak light conditions. This glass integrates daylighting, decoration, and power generation, providing a low‑carbon innovative solution for self‑sustaining building energy supply. Multi‑Party Linkage: Building a New Bridge for Pragmatic CooperationThe 10th China-Russia Expo featured a rich array of side events, hosting nearly 100 supporting activities under the themes of industrial matchmaking, investment promotion, and international cooperation. Among these, 59 matchmaking events were co‑organized by various ministries, provinces/states, and business organizations from China and Russia across more than 20 industry sectors, and over 20 series of activities on Russia‑related economic and trade cooperation achieved precise matching and efficient interaction. The Jiayuan delegation actively participated in some of these matchmaking activities, establishing connections with several Russian enterprises and domestic exhibitors, thereby accumulating valuable resources and contacts for further expanding cross‑border business.Members of the Jiayuan delegation remarked that this China-Russia Expo is not only a vivid demonstration of the high‑quality transformation of China‑Russia economic and trade cooperation but also fully manifests China’s fruitful achievements in independent innovation in semiconductors and high‑tech fields. Taking this visit as an opportunity, Jiayuan will continue to keep a close watch on the latest developments in China‑Russia cooperation, actively connect with the resources of the Expo platform, and explore pragmatic cooperation pathways in areas such as energy and chemical industry chain collaboration, introduction of new material technologies, and expansion of cross‑border trade. The company is committed to contributing its share to high‑quality corporate development driven by technological innovation and to building a new development paradigm.
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2026-05-20
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Focus on fluorine-containing pharmaceutical&pesticide intermediates
