L. A. Kiprianova

Electrochemical initiation by sulfur dioxide of radical-chain trifluoromethylation processes of thiophenols with bromotrifluoromethane

Abstract Sulfur dioxide may serve as an efficient catalyst for the electrochemical trifluoromethylation of thiophenols by Freon F13B1 (CF 3 Br), which enables implementation of trifluoromethylation in an energy-saving radical-chain regime.

Fluoroalkylation of thiophenols with Freons using conjugated electron transfer mediator systems composed of methylviologen-SO2 and I2-SO2

Abstract Methylviologen-sulfur dioxide and iodine (iodide)-sulfur dioxide have been shown to mediate electron transfer from thiophenols to Freons and perform the fluoroalkylation of thiophenols under mild conditions.

Sulfur dioxide electrocatalysis of radical-chain trifluoromethylation of thiophenols by bromotrifluoromethane

The possibility of electrocatalysis by sulfur dioxide has been demonstrated in the trifluoromethylation of thiophenols by Freon F13B1 (CF3Br) to form trifluoromethyl aryl sulfides. A study has been made of the influence of the mediator concentration, the electronic structure of the thiophenol, and the electrolysis conditions on the course of the trifluoromethylation process.

Activation of freons by cascade electron transfer from a nucleophile using two mutually complementary mediators—Methylviologen and sulfur dioxide

It was shown that a system consisting of two mutually complementary electron transfer mediators (methylviologen and sulfur dioxide) is capable of bringing about cascade electron transfer from thiophenols to Freons (CF3Br, CF2ClCCl2F), activating the latter under mild conditions, and bringing them into fluoroalkylation.

Electrochemical functionalization of phenothiazine by nitrogen-containing heterocycles

We demonstrate the feasibility of electrochemically activated introduction of pyridine and nicotinarnide into the aromatic ring of phenothiazine with formation of N-(3-phenothiazinyl)-pyridinium perchlorate and N-(3-phenothiazinyl)-3-carbamide-pyridinium perchlorate. We have studied the physicochemical properties of the derivatives obtained.