SYNTHESIS OF LARGE BUILDING-BLOCKS FOR DENDRITIC POLYETHERS

Building blocks containing multi-aryl ethers linkage in larger size fo r rapid building larger dendrimers were prepared with 3,5-di(4-hydroxy -phenoxy)benzyl alcohol (1) as branch monomer and 1,3,5-tri(4-hydroxy- phenoxy)benzene (2) as core molecule. Two generation of dendritic poly ethers (12 and 15) were obtained by Frechet convergent approach with 3 ,5-diphenoxybenzyl bromide (3) as starting molecule. They were charact erized firstly by H-1-NMR, C-13-NMR, and MS.