Preparation of Higher Generation Dendrons

The procedures utilized to prepare higher generation dendrons, up to [G-6]-OH and [G-6]-Br are similar to those used for lower dendrons. Characterization details and yields can be found in the original literature [1], It should be noted that dendrons of generation higher than six were not prepared using this procedure due to severe lowering of yields as a result of steric effects. 

3 PREPARATION OF POLYETHER DENDRIMERS BY ASSEMBLY OF FRECHET-TYPE DENDRONS AROUND A CORE 

A mixture of the selected dendritic benzyl bromide (for example 9, 31 mmoles), 

1- tris(4/-hydroxyphenyl)ethane or its partly dendronized derivative due to the presence of phenolic moieties in the undesired material. If desired, the excess of l,l,l-tris(4 -hydroxyphenyl)ethane can be easily recycled. 

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