Preparation of Dialkyl (2,2,2-Trifluoroethyl)phosphonates by Cu-Promoted Reactions of 1,1-Dichloro-2,2,2-trifluoroethane with HP(O)(OR)2

Reactions Using Freons and Halothane as Halofluoroalkyl/Halofluoroalkenyl Building Blocks

In recent years, hydrofluorocarbon compounds such as chlorofluorocarbons, hydrochlorofluorocarbons, and 2-bromo-2-chloro-1,1,1-trifluoroethane (halothane) have been used as fluorine-containing building blocks to construct functional fluorine-containing compounds, e. g., polymers, liquid crystals, and medicines. Hydrofluorocarbons promote the formation of reactive fluoroalkyl or fluoroalkenyl species via anionic or radical processes, and these species can act as nucleophiles or electrophiles depending on the reaction conditions. Progress in fluorine chemistry using hydrofluorocarbons in the last 30 years is described in this review and diverse reactions are discussed, including the fluoroalkyl/alkenyl products and proposed mechanisms involved.

TFA-Promoted Intermolecular Friedel-Crafts Alkylation of Arenes with 2,2,2-Trifluoroethylaryl Sulfoxides

The classical Pummerer rearrangement of 2,2,2-trifluoroethylaryl sulfoxide with trifluoracetic anhydride (TFAA) affords the S , O -acetal efficiently. In the presence of trifluoracetic acid (TFA) as the co-solvent, the S , O -acetal can regenerate reactive thionium intermediate of Pummerer rearrangement. When employing arenes as nucleophiles, this strategy produces corresponding 1-thiyl-2,2,2-trifluoroethyl arenes with excellent yields under metal-free conditions.

Unexpected Substitution Reaction of 1,1-Dichloro-2,2,2-trifluoroethane (HCFC-123) with Phenolates

An unexpected substitution reaction of HCFC-123 with phenolates is reported. During the reaction, fluorine atoms in HCFC-123 are removed one by one in the presence of phenolates.

Experimental and computational studies on the formation and biological properties of the simplest polyfluoroalkyl phosphonates

The simplest polyfluoroalkyl phosphonates exhibit high cell-line specific cytotoxicity.

Phosphinodifluoroalkylation of alkynes using P(O)H compounds and ethyl difluoroiodoacetate

The first phosphinodifluoroalkylation of alkynes is achieved and the simultaneous addition of both difluoromethylene and phosphinoyl groups across the alkynes with high regio- and stereoselectivity is of great significance.