POLYAMINOPHOSPHINES CONTAINING DENDRIMERS - SYNTHESES AND CHARACTERIZATIONS

The synthesis of phosphorus containing dendrimers 2[G(0)]-2-[G(3)] and 3-[G(0)('')]-3-[G(1)('')] is achieved from the hexapodant N3P3(OC6H4C HO)(6)2-[G(0)] used as a core. It involves iterative reaction sequence s: condensation reaction of 2[G(0)] with methylhydrazine followed by t reatment of the resulting hydrazone with either chlorodiphenylphosphin e or chlorodiazaphospholane, the last step being the reaction of the d endrimer possessing terminal aminophosphino groups with the azido thio phosphine N3P(S)(OC6H4CHO)(2) 4. The construction of the dendrimer of the third generation 2-[G(3)] is accomplished by reacting the arborol 2-[G(2)('')] possessing 24 phosphino groups at the periphery with 4. The same reactions conducted with the ligand (S)P(OC6H4CHO)(3) 6-[G(0) ] used as a core,instead of 2-[G(0)], allow the preparation of dendrim ers of the first, second, and third generation 6-[G(1)]-6-[G(3)('')].