A New Method for Preparing Polyfluorinated Ethers

The Study of Impact of Octafluoropentyl Group on Rheological Properties of Carboxymethyl Cellulose Gels on Its Surface

“…Carboxymethyl cellulose sodium salt of medium viscosity mark 85/1100 and the product of its polyfluoroalkylating are the subjects of our study. Structural formulas of the initial (1) and modified (2) polymers are listed below:…”

“…The present task is solved by directed heterophase modification of polymer's surface by octafluoropentyl fragment [1][2][3][4][5][6][7], which is introduced along hydroxylic groups of polymer matrix. This allows directed alteration of physical and chemical properties of polymers, and compositions, in which the present polymer can be used as one of the components.…”

Features of Reaction of Polyfluoroalkyl Chlorosulfites with Salicylaldehyde

“…The reactions were performed in the presence of triethylamine [1,2], with a DMF catalyst [3] or with no catalyst, using equimolar reagent amounts and hexane as solvent. The catalyst was found to have no effect of the reaction direction, and sulfite IV is formed in~57% yield.…”

Synthesis of Polyfluorinated Ethers

“…Published procedures for PFE synthesis involve nucleophilic and radical addition of alcohols to polyfluoroalkenes, trifluoromethylation of polyfluorinated alcohols catalyzed by Lewis acids [3], alkylation of polyfluoroalkoxide anions with dimethyl sulfate [4] or polyfluoroalkyl chlorosulfites [5,6], etc. Combinations of various reagents in PFE synthesis allow preparation of compounds of diverse structures.…”