Butyl ethylene imine

The cationic polymerization of TV-substituted ethylene imines proceeds similarly. AT-/-butyl ethylene imine is an exception, since its polymerization occurs without termination or transfer, and so, is a living polymerization. 

Schematic representation to the reversible temperature-induced control over osmotic flux (top) and the structure of the utilized thermoresponsive butylated branched poly(ethylene imine) (Noh eta ., 2012). 

A Japanese research group has also reported on the cycloaddition of an olefin to an imine anion (268) in this case the first report of ethylene participating in such a reaction. The group also used a novel means of introducing the ethylene into the reaction in which the imine (267) was deprotonated by means of a large excess of n-butyl lithium in THF, which was decomposed by the base, generating the olefin in situl Overall yields of 20—80% were claimed for the reactions shown in Scheme 36. 

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