Syndiotactic PPP derivatives

It is also possible to synthesize chiral PPPs as Scherf et al. reported [72]. They are composed of chiral cyclophane subunits, made by a Suzuki-type aryl aryl cross-coupling reaction of the corresponding diboronic acid and dibromo derivatives. The monomers containing cyclic -O-C10H20-O- loops were separated into the pure enantiomers and used to generate the corresponding stereoregular iso- and syndiotactic PPP-derivatives (Scheme 26). The isotactic derivative possesses a chirality of its main chain. 

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