Oligothiophenes dendronized

Ma CQ, Mena-Osteritz E, Debaerdemaeker T, Wienk MM, Janssen RAJ, Bauerle P (2007) Functionalized 3D oligothiophene dendrons and dendrimers novel macromolecules for organic electronics. Angew Chem Int Ed 46 1679-1683... 

Figure 7.16 (A) Dendron-capped poly(triacetylene) and, (B) soluble oligothiophenes obtained by dendrimers assisted synthesis...

Apperloo, J.J. et ah. Concentration-dependent thermochromism and supramolecular aggregation in solution of triblock copolymers based on lengthy oligothiophene cores and polyfbenzyl ether) dendrons. Macromolecules 33, 7038-7043, 2000. 

Malenfant, P.R.L., L. Groenendaal, and J.M.J. Frechet. 1998. Well-defined triblock hybrid dendri-mers based on lengthy oligothiophene cores and poly(benzylether dendrons). / Am Chem Soc 120 10990-10991. 

Oligothiophenes end-capped with polybenzyl ether dendrons were prepared by Frechet s group (Scheme 1.70) [508]. Benzyl ester-substituted quinquethiophene 5.65 was deprotected in basic medium to the carboxylic acid and converted to the corresponding acid chloride using oxalyl chloride. This was then connected to a G5-hydroxyl-terminated Frdchet dendron by ester linkages. Stille-type coupling of the terminally brominated quinquethiophene and 2,5-bis(trimethylstannyl)thiophene afforded the highly... 

Frechet et al. subsequently prepared dendronized oligothiophenes 5.68 and 5.69 up to a nonamer. The aliphatic ether dendrons were attached either to the a-position of a terminal or to the P-position of a central thiophene unit (Chart 1.77) [511]. The syntheses were performed by iterative NBS brominations and Pd°-catalyzed Stille-type coupling reactions. These materials revealed that the attachment of dendrons... 

In Section 1.5, recent approaches to 3D star-shaped and dendritic structures are described. Linear oligothiophenes decorated with classical dendrons or dendrimers which are substituted by smaller oligothiophenes appeared on the scene. Then, in the last few years, aZZ-thiophene dendritic structures came up as highly... 

P. R. L. Malenfant, L. Groenendaal and J. M. J. Fr6chet, Well-defined triblock hybrid dendrimers based on lengthy oligothiophene cores and poly(benzyl ether) dendrons, J. Am. Chem. Soc., 120, 10990-10991 (1998). 

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