Acetal Vinyl Ether

With catalytic amounts of acids ethyl vinyl ether adds to alcohols to give the mixed acetal.

Acetal vinyl ether.

Furthermore the reaction enables a facile entry to labile diarylacetaldehydes by tfa mediated hydrolysis of the β β disubstituted vinyl ethers. The gas phase cracking method uses a metal as a catalyst to cleave the acetal vapor in a high temperature environment and deposits a fine metal powder such as silver or gold on a carrier as a catalyst and cleaves the acetal at 25 c to 40 c to form an olefin ether. A series of aromatic acetals 1 from substituted phenols ch3ch oibu oar. A polyaddition reaction via the cyclotrimerization of one vinyl ether and two conjugated dialdehyde molecules successfully proceeded using etalcl 2 as a lewis acid catalyst yielding a polymer with cyclic acetal structures in the main chain.

An alternative approach to the desired vinyl ether was inspired by the work of hoye and others who demonstrated the selective silylation ring opening of a 1 2 acetal to afford an allyl vinyl ether. The use of a low reactive or non polymerizable vinyl ether and the choice of adequate catalysts were extremely important for the effective. Most of them were quantitatively synthesized by the addition of the corresponding. This alcohol protection reaction is akin to the behavior of dihydropyran.

The vinyl carbonate 13 152 gives only copolymerization the ketene acetal 11 153 and the methyl vinyl ether 14 152 give both copolymerization and chain transfer in styrene polymerization whereas with the benzyl vinyl ethers 12 153 15 8 and 16 18 151 chain transfer is the only reaction detected. Importantly the copolymerization times 10 s 70 h and the sequences of the copolymers multiblock random or approximately alternating significantly differed depending on the cyclic acetal used. Packaging 1 kg in glass bottle 100 500 g in glass bottle. This strategy was particularly attractive since it would avoid the use transition metal catalysis.

A number of functional groups are well tolerated under the reaction conditions. Ar c6h5 p ch3oc o c6h4 p ch3c o c6h4 p no2c6h4 4 no2 2 6 di c6h5 c6h2 o ch3c o c6h4 were employed as new initiators in conjunction with lewis acids mtxn for the living cationic polymerization of isobutyl vinyl ether ibve. Secondary kinetic isotope effects in water and aqueous dioxane and the stability of the ethoxyethyl cation. Hydrolysis of acetaldehyde diethyl acetal and ethyl vinyl ether.

Etoch ch 2 roh etoch or ch 3. Ethyl vinyl ether participates in many reactions of interest to organic synthesis. The controlled cationic copolymerization of 2 chloroethyl vinyl ether ceve and various cyclic acetals successfully proceeded in a living manner. It has been used as synthetic building block.