Rapid synthesis of polyamide dendrimers from unprotected AB2 building blocks.
A rapid synthetic method for the preparation of polyamide dendrimer without protection and deprotection steps has been developed. A symmetrically branched third-generation polyamide dendrimer was prepared by a convergent method involving activation of focal point with a condensing agent, diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate (DBOP), followed by condensation of the active amide with the diaminocarboxylic acid 3,5-bis(4-aminophenoxy)benzoic acid as an AB2 building block.
Okazaki
Masaki
M
Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
Washio
Isao
I
Shibasaki
Yuji
Y
Ueda
Mitsuru
M