Abstract
Poly (vinyl ethers) are compounds with great value in the coating industry due to exhibiting properties such as high viscosity, soft adhesiveness, resistance to saponification and solubility in water and organic solvents. However, the main challenge in this field is the synthesis of vinyl ether monomers that can be synthetized by methodologies such as vinyl transfer, reduction of vinyl phosphate ether, isomerization, hydrogenation of acetylenic ethers, elimination, addition of alcohols to alkyne species etc. Nevertheless, the most successful strategy to access to vinyl ether derivatives is the addition of alcohols to alkynes catalyzed by transition metals such as molybdenum, tungsten, ruthenium, palladium, platinum, gold, silver, iridium and rhodium, where gold-NHC catalysts have shown the best results in vinyl ether synthesis. Recently, the hydrophenoxylation reaction was found to proceed through a digold-assisted process where the species that determine the rate of the reaction are PhO-[Au(IPr)] and alkyne-[Au(IPr)]. Later, the improvement of the hydrophenoxylation reaction by using a mixed combination of Cu-NHC and Au-NHC catalysts was also reported. DFT studies confirmed a cost-effective method for the hydrophenoxylation reaction and located the rate-determining step, which turned out to be quite sensitive to the sterical hindrance due to the NHC ligands.
Highlights
Over time, alchemists and chemists have directed their efforts to control chemical processes through “species capable of accelerating the rate of reaction.” since the18th century, they have made significant advances in the catalysis field
The synthesis of vinyl ethers can be achieved by a metal-mediated addition of alco(10)
Most significant results were obtained with (Equation hand,of aalkene metal-catalyzed carbon-oxygen coupling is anbe alternative way tometal-mediated synthesize alkoxThe synthesis of vinyl ethers can achieved by acopper(I)
Summary
Alchemists and chemists have directed their efforts to control chemical processes through “species capable of accelerating the rate of reaction.” since the. Since the 1920s, the Du Pont company has positioned itself at the top of the polymer market with its polymeric films and synthetic fibers such as cellophane, rayon, nylon and polyester [7] Due to properties such as high viscosity, soft adhesiveness, 4.0/). REVIEW resistance toPEER saponification ethers) and solubility in water and organic solvents, poly(vinyl have been the focusnylon of the polymer industry [8]. Due to properties such as high viscosity, soft adhesiveness, resistance to polyester saponification andto solubility in water and organic solvents, ethers) nylon and [7]. Alcohols to Get Vinyl Ethers have been theoffocus ofEthers the polymer nylon and polyester [7] Due to properties such asindustry high viscosity, soft adhesiveness, re. Synthesis of Ethers have been the focus of the polymer industry gies for obtaining vinyl ether tomonomers
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