Rapid synthesis of phosphorus-containing dendrimers with controlled molecular architectures: First example of surface-block, layer-block, and segment-block dendrimers issued from the same dendron

A third generation dendron possessing one activated vinyl group linked to t he con and 16 chlorines linked to the surface has been functionalized with various groups at the core (primary amine, phosphine, or azide), and on the surface (aldehyde, tertiary amine, or nitrile). These functionalized dendr ons are used as building blocks for the synthesis of several complex dendri tic architectures, obtained through core-core, core-surface, or core-core-s urface-core couplings using very simple one-step reactions between these fu nctions, such as Michael additions between vinyl and primary amino groups o r Staudinger reactions between phosphines and azides. These reactions final ly induce the formation of layer-block dendrons, a surface-block dendrimer, a layer-block dendrimer, a layered surface-block dendrimer: and a segment- block dendrimer, all issued from the same original dendron.