Methylpropyl propenyl ether

Enantiomer selection is also found in vinyl ether polymerization [226,227], The polymerization of cis- and trans- 1-methylpropyl propenyl ethers using (-)-menthoxyaluminum dichloride [227] and the copolymerization of rac- 1-methylpropyl vinyl ether with optically active monomers [226] are enantiomer selective. 

Each product exhibits different properties of the crystalline phase. Another example is the enantioelective cationic polymerization of racemic cis-1 --methylpropyl-l-propenyl ether initiated by (— )-menthoxyaluminium dichloride in toluene at 351 K. The polymer is optically active ( + ) and the remaining monomer can be transformed to a polymer with negative optical activity by BF3OEt2 [100]. 

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