Synthesis of a chiral dendrimer based on polyfunctional amino acids
作者:Andreas Ritzén、Torbjörn Frejd
DOI:10.1039/a809195a
日期:——
A chiral, nonracemic dendrimer of generation two based on aromatic bis- and tris-amino acids has been synthesised.
合成了一种基于芳香族双氨基酸和三氨基酸的第二代手性非外消旋树状聚合物。
Synthesis and Authentication of Iodoazidophenpyramine, a Photoaffinity Reporter Ligand Previously used for Histamine H1-Receptor Labelling
作者:Giovanni Sorba、Wasyl Tertiuk、C. Robin Ganellin
DOI:10.1002/ardp.19953280909
日期:——
The synthesis is described of aminophenpyramine (7) (N‐5‐[2‐(4‐aminophenyl)ethananmido]pentanyl}‐N′‐(4‐methoxybenzyl)‐N‐methyl‐N′‐(2‐pyridinyl)‐1,2‐ethandiamine), its monoiodo‐ and diiodo‐derivatives (8 and 9), and iodoazidophenpyramine (1). The last compound is synthesised by two different routes to confirm the identity of the [125I]iodinated ligand previously made only in solution and used for characterisation
Chiral dendrimers up to the second generation have been prepared from enantiopure aromatic bis- and tris(amino ac ids) by peptide coupling techniques. The dendrimers could be deprotected to yield water-soluble polyamine and/or polycarboxylic acid macromolecules. Two complementary types, with respect to the charges carried in water at pH = 7, were synthesised. A chiroptical study of the protected dendrimers, which were soluble in THF and CHCl3, was conducted. The results of that study indicate that the solution shapes of these dendrimers are rather decongested, with little steric interaction between different parts of the dendritic structure.