Isobutyl propenyl ether

Recent preliminary experiments showed that the HI/I2 initiating system leads to nearly living polymerizations of pMOS, isobutyl propenyl ether, and the like. 

Poly(isobutyl propenyl ether) [Poly(l-isobutoxy-2-methylethylene)] ... 

Problem 14.45 Give the structural formula and lUPAC name for (a) n-propyl propenyl ether, (b) isobutyl terf-butyl ether, (c) 12-crown-4 ether. M... 

Propenyl Ethers and Unsaturated Cyclic Ethers Propenyl ethers (CH3—CH=CH—OR R = ethyl, isobutyl, etc. cis- and trans-isomers) and 3,4-dihydrofuran are linear and cyclic a,/3-unsaturated ethers, that can be regarded as / -substituted vinyl ether derivatives. For these monomers a few controlled/living cationic polymerizations have been reported. The HI/I2 system is generally effective for both linear and cyclic monomers [181,182,183], whereas a recent study by Nuyken indicates that the IBVE-HI adduct coupled with nBu4NC104 is suited for 3,4-dihydrofuran (see Section V.A.4) [184]. A variety of mono- and bifunctional propenyl ethers can readily be prepared by the ruthenium complex-catalyzed isomerization of corresponding allyl ethers [185]. 

The method is particularly suitable for the reaction of vinyl ethers and other easily polymerizable olefins. Moreover, the reaction proceeds stereospccifically thus ris-propenyl isobutyl ether gives ci s-l-methyl-2-isobutoxycyclopropane and trans-propenyl isobutyl ether gives trans- l-methyl-2-isobutoxycyclopropane.1... 

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