Iterative Methodology with Regeneration of Two or More DPE Functions

2 Iterative Methodology with Regeneration of Two or More DPE Functions 

The number of arms introduced in the above-mentioned methodology is one segment in each iterative process. With the use of l,3-bis(l-phenylethenyl)benzene (2), composed of two DPE 

In a similar sense, it may also be possible to increase the number of arms in each process by replacing the DPE-fiinctionalized agent 1 with 3,5-bis(3-(4-(l-phenylethenyl)pheny)propoxy) 

The structural variations of multiarmed multicomponent miktoarm stars have been greatly extended by the iterative methodology using 4, but it is still limited, especially to the synthesis 

The synthesis was initiated to prepare a chain-end-(DPE)2-functionalized polymer (A) by a reaction of a living anionic polymer (A) with 4. In the first iteration, a linking reaction of the DPE-functionalized polymer (A) with a living polymer (B), followed by reacting either 1 or 4, afforded two kinds of 3-arm AB2 star-branched polymers. The number of core-functionalized DPE functions was the same (two) as that of the starting polymer in the former reaction, while it doubled to four in the latter reaction. The polymers abbreviated as 3-arm AB2 (DPE)2 and 3-arm AB2 (DPE)4, respectively. In the second iteration by repeating the same reaction 

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