/Studies in man revealed/ peak serum levels are reached within a half hour, and levels fall promptly, with 20% of a given dose being excreted in the urine within 4 hr. /Fluoride/
FLUORIDES ARE ABSORBED FROM GI TRACT, LUNG, & SKIN. GI TRACT IS MAJOR SITE OF ABSORPTION. THE RELATIVELY SOL CMPD, SUCH AS SODIUM FLUORIDE, ARE ALMOST COMPLETELY ABSORBED. ... FLUORIDE HAS BEEN DETECTED IN ALL ORGANS & TISSUES, AND IT IS CONCENTRATED IN BONE, THYROID, AORTA, & PERHAPS KIDNEY. FLUORIDE IS PRIMARILY DEPOSITED IN BONE & TEETH, & THE DEGREE OF SKELETAL STORAGE IS RELATED TO INTAKE AND AGE. ... MAJOR ROUTE OF ... EXCRETION IS VIA THE KIDNEYS; ... /ALSO EXCRETED IN SMALL AMT/ IN SWEAT, MILK, AND INTESTINAL SECRETIONS. ... ABOUT 90% OF FLUORIDE ION FILTERED BY GLOMERULUS IS REABSORBED BY RENAL TUBULES. /FLUORIDE/
/RENAL CLEARANCE/ 1. VIRTUALLY ALL FLUORIDE IN PLASMA ... IS ULTRAFILTERABLE. 2. RENAL EXCRETION OF RADIOFLUORIDE DEPENDS ON GLOMERULAR FILTRATION & VARIABLE TUBULAR REABSORPTION. 3. PROBABLY, REABSORPTION IS LARGELY PASSIVE ... 4. FLUORIDE EXCRETION INCR WHEN PLASMA CONCN IS INCREASED. 5. PROCEDURES THAT INCREASE URINARY FLOW RATE (EG, ADMIN OF OSMOTIC DIURETICS, HYPERTONIC SALINE, OR DIURETIC DRUGS) INCREASE THE CLEARANCE OF FLUORIDE. /FLUORIDE/
RATS GIVEN (18)FLUORIDE ION AS A RADIOTRACER BY CONTINUOUS IV INFUSION OF SODIUM FLUORIDE FOR 3 HR SHOWED AT SUBLETHAL DOSE RATES, BLOOD FLUORIDE CONCN NEARS STEADY STATE PROPORTIONAL TO FLUORIDE INFUSION RATE. BLOOD, KIDNEY, & LUNG HAD HIGHEST CONCN @ DOSES UP TO 3 MG FLUORIDE/KG/HR, BUT @ 6 MG/KG/HR THE FLUORIDE OF THE LIVER, SPLEEN & HOLLOW ORGANS INCR SHARPLY. AMT ABOVE THIS WAS NOT WELL PROCESSED BY EXCRETORY MECHANISM. RATS INFUSED 3 HR WITH 6 MG FLUORIDE/KG/HR: DURING INFUSION FLUORIDE CONCN OF BONE & OTHER TISSUES WAS HIGH, BONE THE HIGHEST. OF SOFT TISSUES, LUNG HAD THE HIGHEST, BRAIN, TESTES, & FAT PADS THE LEAST CONCN. DURING DEPLETION PHASE, TISSUE FLUORIDE CONCN DECR, BONE FLUORIDE REMAINED CONSTANT, & SUBSTANTIAL AMOUNT REMAINED IN THE LUNG. /FLUORIDE/
氟光气 在
fluorine 、 cesium fluoride 作用下,
以
neat (no solvent, gas phase) 为溶剂,
生成 三氟甲基次氟酸酯
参考文献:
名称:
带有电沉积的分层纳米结构镍涂层的催化微反应器,用于气相氟化反应
摘要:
研究了催化微反应器的制备,该催化微反应器用于在F 2钝化的纳米结构Ni涂层上负载的CsF催化剂上使未稀释的二氟化羰基氟化物与元素氟反应以合成三氟甲基次萤石CF 3 OF 。通过两步程序电沉积用于催化剂固定的纳米结构化镍载体,该程序由低电流密度步骤和短暂的高电流密度步骤组成,用于结构特征的分级区分。将NiCl 2与二乙醇胺作为晶体改性剂,并将月桂基硫酸钠作为抗点蚀剂的水溶液用作电解质。在H 2 SO 4上进行恒定pH的Ni电结晶通过基于HCl / H 3 BO 3的缓冲液在1至4的pH范围内腐蚀Cu衬底。在不超过300 mbar的未稀释F 2下进行钝化。进行了XRD,XPS,SEM,AFM和静态接触角测量。由于结构化Ni层的可再现性和均质性,根据特征数据选择了从pH 3电解液中获得的Ni涂层用于微反应器的制造。催化微反应器允许按需从纯反应物定量生产CF 3 OF,并消除了相对于合成的热和安全控制的任何关键要求。CF
utilization of decomposition products of PFECAs. We report herein a new series of deoxyfluorination reagents featuring OCF2 functional groups derived from certain PFECAs. Alkyl fluorides were generated from various alcohols in ≤97% yield by these novelreagents. The mechanistic experiment verified in situgeneration of carbonic difluoride (COF2).
[EN] PROCESS FOR THE PREPARATION OF FLUOROALKYL (FLUORO)ALKYL CARBONATES AND CARBAMATES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE FLUOROALKYL (FLUORO)ALKYL CARBONATES ET CARBAMATES
申请人:SOLVAY FLUOR GMBH
公开号:WO2011006822A1
公开(公告)日:2011-01-20
Fluoroalkyl alkyl carbonates and fluorosubstituted carbamates which are suitable as additives or solvents in lithium ion batteries are prepared from fluoroalkyl fluoro formates and the respective alcohol or amine. Methanol is the preferred alcohol, dimethylamine and diethylamine are preferred amines. Fluoromethyl methyl carbonate is the preferred compound to be produced. Fluoroalkyl fluoro formates can be prepared from aldehydes and carbonyl fluoride.
Novel synthetic route to perfluoroallyl cyanide (PFACN) reacting perfluoroallyl fluorosulfonate with cyanide
作者:Sergey N. Tverdomed、Markus E. Hirschberg、Romana Pajkert、Klaus Hintzer、Gerd-Volker Röschenthaler
DOI:10.1016/j.jfluchem.2018.03.003
日期:2018.6
perfluoroallyl cyanide CF2CFCF2CN (PFACN) is presented. This includes the addition – elimination reaction of cyanide anion with perfluoroallyl fluorosulfate CF2CFCF2OSO2F (PFAFS). The reaction conditions, factorsaffecting the reactivity and regioselectivity of the process, the choice of reagent as well as the course of competitive reactions are discussed, too.
Trifluoromethyl Benzoate: A Versatile Trifluoromethoxylation Reagent
作者:Min Zhou、Chuanfa Ni、Yuwen Zeng、Jinbo Hu
DOI:10.1021/jacs.8b04000
日期:2018.6.6
Trifluoromethyl benzoate (TFBz) is developed as a new shelf-stable trifluoromethoxylation reagent, which can be easily prepared from inexpensive starting materials using KF as the only fluorine source. The synthetic potency of TFBz is demonstrated by trifluoromethoxylation-halogenation of arynes, nucleophilic substitution of alkyl (pseudo)halides, cross-coupling with aryl stannanes, and asymmetric
Carbonyl fluoride, which can also be used as an etching gas, can be prepared by photochemical oxidation of chlorodifluoromethane or trifluoromethane with light, for example with light of a wavelength ≧280 nm in the presence of chlorine.