A comparison of two convergent routes for the preparation of metalloporphyrin-core dendrimers: direct condensationvs. chemical modification

Photoisomerization of Stilbene Dendrimers: The Need for a Volume-conserving Isomerization Mechanism¶

“…Dendrimer chemistry is rapidly expanding in both basic and application studies. When a dendrimer contains a photoreactive unit as a core, the photochemical properties of the core may be modified by the dendritic branches (28)(29)(30)(31).…”

Photophysical properties of composite film of dendron-appended porphyrin and fullerene[60]

“…The preparation of dendritic porphyrin was pioneered by Aida and co-workers via coupling reaction of porphyrin core with poly(benzyl ether) dendrons [15]. We employed Lindsey-type condensation in which dendron-appended porphyrin (5) was induced by acid-catalyzed condensation of den-CHO with an equivalent amount of pyrrole and subsequent oxidation with p-chloranil [16]. Since the fi rst dendritic fullerene was prepared by using a conventional Williamson ether synthesis of fullerene carrying two phenolic sites with dendron having benzylic bromides [17], several efforts with a variety of synthetic protocols, including the coupling of dendritic azides [18] and coordinative binding of dendritic ligands [19], were successfully followed.…”

Synthetic Aspects of Porphyrin Dendrimers

“…Fréchet and co‐workers employed this strategy for the first time to avoid the long reaction times and harsh purification procedures generally observed in convergent routes toward Aida‐type poly(benzyl ether) porphyrin dendrimers 9a,9c. The dendritic aldehyde and pyrrole were combined in a one‐pot, two‐step Lindsey porphyrin synthesis (TFA catalysis, chloranil oxidation), affording 25–30 % yields of G 1 –G 3 porphyrin dendrimers.…”