A NEW SYNTHESIS OF ALKYL FLUORIDES: THE PYROLYSIS OF 2-ALKYLPSEUDOURONIUM FLUORIDES AND FLUOROBORATES
作者:J. H. Amin、J. Newton、F. L. M. Pattison
DOI:10.1139/v65-442
日期:1965.12.1
The pyrolysis of 2-alkylpseudouronium fluorides and fluoroborates at approximately 185° gave alkyl fluorides in yields of up to 77%. The method is most useful for the preparation of primary alkyl fluorides; attempts to prepare secondary fluorides, such as cyclohexyl fluoride, gave the corresponding alkenes.
Oxidative fluorination of alkyl iodides with p-iodotoluene difluoride (4) was carried out. In the presence of Et3N–4HF, the fluorination reaction of prim-alkyl iodides selectively took place at the iodine position under mild conditions to give the corresponding alkyl fluorides in good yields.
The infrared and Raman spectra of F(CH2)nF (n=3–6) were measured and analyzed on the basis of the normal coordinate treatment. The spectral analyses indicated that the molecule in the solid state takes the gauche-gauche conformation for n=3, gauche-trans-gauche’ for n=4, gauche-trans-trans-gauche for n=5, and gauche-trans-trans-trans-gauche’ for n=6.
POTASSIUM FLUORIDE DISPERSION SOLUTION, AND PROCESS FOR PRODUCTION OF FLUORINATED ORGANIC COMPOUND USING THE SAME
申请人:Hagiya Koji
公开号:US20090099387A1
公开(公告)日:2009-04-16
A potassium fluoride dispersion essentially consisting of potassium fluoride and an aprotic organic solvent having a boiling point higher than that of methanol, which is obtainable by mixing a mixture containing potassium fluoride and 5 to 50 parts by weight of methanol per 1 part by weight of potassium fluoride with the aprotic organic solvent followed by concentrating the obtained mixture, and a process for producing a fluorine-containing organic compound comprising contacting an organic compound having at least one group capable of being substituted nucleophilically with a fluorine atom with the potassium fluoride dispersion.
A useful conversion of alcohols to alkyl fluorides
作者:David A Flosser、Roy A Olofson
DOI:10.1016/s0040-4039(02)00738-4
日期:2002.6
A usefulconversion of alcohols to alkyl fluorides via their fluoroformates is introduced. The fluoroformates are obtained in nearly quantitative yield from the alcohols by treatment with COF2 (generated in situ from bis(trichloromethyl) carbonate) in ether with KF as an added acid scavenger. The neat fluoroformates are cleaved to the fluorides by heating at 120–125°C using hexabutylguanidinium fluoride