Macromonomer Synthesis by Addition Processes

In 1973, Tsuruta and his coworkers79) established that diethylamine adds stoichio-metrically to styrene in the presence of some lithium diethylamide. The reaction mechanism involves two steps namely a kind of anionic initiation and subsequent proton transfer, due to the difference in the acidity between the benzylic and amine substrate  

Also 1,3-dienes undergo such an addition reaction the adducts formed almost exclusively exhibit cis-1,4 structure 80). 

When applied to p-divinylbenzene (DVB), this reaction exhibits an interesting feature 81) a monoadduct is easily obtained and isolated because of the rather large difference in the reactivity between the two double bonds of p-DVB. However, when the reaction time is increased, the second DVB double bond may also be involved in the addition. The rate of the first step is roughly 20 times faster than that of the second  

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