10.1016/j.tetlet.2010.11.016
The research focuses on the efficient synthesis of new dendrimeric polyesters up to the third generation, utilizing 1,3,5-benzenetricarboxylic acid as a building block. These dendrimers, which possess hydroxy or allyl functional groups on their surface, show potential applications in drug delivery. The synthesis was conducted through a divergent approach, starting with readily available 2-(hydroxymethyl)-2-ethylpropan-1,3-diol and 1,3,5-benzenetrimethanol as central cores, with 3,5-bis[(allyloxy)methyl]benzoic acid being an essential unit of the dendrimer. Key chemicals used in the process include 1,3,5-benzenetricarboxylic acid, its trimethyl ester, borane-dimethyl sulfide complex, allyl bromide, and various reagents for coupling and deprotection reactions such as EDCI, DMAP, and Pd/C. The conclusions of the research indicate that the mild conditions of both coupling and deprotection reactions provided highly pure macromolecular material in good overall yields, and the dendrimers obtained are terminated with reactive carbon-carbon double bonds or benzylic hydroxy groups, which could be further functionalized, making them suitable candidates for drug delivery and for grafting various compounds, including biomolecules, onto their surfaces.