REPETITIVE STRATEGY FOR EXPONENTIAL-GROWTH OF HYDROXY-FUNCTIONALIZED DENDRONS

The synthesis of dendrons with orthogonally protected functional group s, which allows the construction of dendrons in an exponential fashion , is described. The sequence has been carried out on a gram scale for the first, second, and fourth generation. The dendrons have a relative ly loose and flexible structure, which should make further growth feas ible. Owing to the dendrons' adjustable and broadly applicable substit ution pattern, they are the first representatives of a future construc tion kit for the systematic synthesis of layered dendrimers. The coupl ing step involves urethane formation.