Synthesis and Characterization of Polyester Dendrimers from Acetoacetate and Acrylate
摘要:
New aliphatic polyester-type dendrimers were synthesized using a new AB(2)-type building block 3, prepared from benzyl acetoacetate and 2 equiv of tert-butyl acrylate by acelloacetic acid ester synthesis. The reiterative [deprotection by HCO2H, then EDCI/DMAP coupling] sequence using divergent growth method gave [G1]-4tBu-[G5]-64tBu dendrimers. C-13 NMR relaxation time (T-1) measurements on the carboxy carbons show that the extended chain conformations are predominant in CDCl3.
Synthesis and Characterization of Polyester Dendrimers from Acetoacetate and Acrylate
摘要:
New aliphatic polyester-type dendrimers were synthesized using a new AB(2)-type building block 3, prepared from benzyl acetoacetate and 2 equiv of tert-butyl acrylate by acelloacetic acid ester synthesis. The reiterative [deprotection by HCO2H, then EDCI/DMAP coupling] sequence using divergent growth method gave [G1]-4tBu-[G5]-64tBu dendrimers. C-13 NMR relaxation time (T-1) measurements on the carboxy carbons show that the extended chain conformations are predominant in CDCl3.
New aliphatic polyester-type dendrimers were synthesized using a new AB(2)-type building block 3, prepared from benzyl acetoacetate and 2 equiv of tert-butyl acrylate by acelloacetic acid ester synthesis. The reiterative [deprotection by HCO2H, then EDCI/DMAP coupling] sequence using divergent growth method gave [G1]-4tBu-[G5]-64tBu dendrimers. C-13 NMR relaxation time (T-1) measurements on the carboxy carbons show that the extended chain conformations are predominant in CDCl3.