Article

Synthesis of hyperbranched P poly(glycerol-diacid) oligomers.

DOI:IND43881945
Source: OAI

ABSTRACT Novel oligomeric prepolymers were synthesized by acid-catalyzed condensation of glycerol with iminodiacetic, azelaic, or succinic acid. The prepolymers were obtained, on average, in 62% yield and were characterized by ¹³C NMR, ¹H NMR, matrix-assisted laser desorption ionization-time of flight-mass spectrometry, and gel permeation chromatography. The synthesized oligomers had an average M.W. of 1543 Daltons (average polydispersity (PD)=1.34, average degree of polymerization (DOP)=5.5). Hyperbranching was evident in the oligomers produced when using azelaic acid and succinic acid as co-monomers with glycerol, whereas the reaction between iminodiacetic acid and glycerol resulted in linear products bearing cyclic urethane structures.

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    Article: Selectively Functionalized Glycerol/Diacid Dendrimers via Click Chemistry of Azido Fatty Acids
    Jonathan A. Zerkowski, Alberto Nuñez, Daniel K. Y. Solaiman
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    ABSTRACT: Dendrimers consisting of glycerol and dicarboxylic acid units were synthesized using a convergent or “outside-in” strategy. The multimeric arms, or dendrons, are joined to a central core in the final step using the azide/alkyne click reaction. The combination of these approaches allows the preparation of dendrimers with variable and controlled degrees of substitution at their periphery. For example, a single protected amino acid has been situated at the periphery, with all other substituents being hydrophobic. In another example, all the peripheral substituents are protected amino acids. The identity of the dendrimers is unambiguous due to the purification and characterization of all the synthetic intermediates. Functional groups have also been selectively incorporated along the arms (dicarboxylic acids) and at the cores. KeywordsDendrimers–Nanochemistry–Functionalized oligoesters–Click reaction
    Journal of Oil & Fat Industries 04/2012; 88(3):403-413. · 1.77 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

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Keywords

acid-catalyzed condensation
 
azelaic
 
azelaic acid
 
gel permeation chromatography
 
glycerol
 
iminodiacetic acid
 
linear products bearing cyclic urethane structures
 
matrix-assisted laser desorption ionization-time
 
Novel oligomeric prepolymers
 
oligomers
 
succinic acid
 
synthesized oligomers
 
¹H NMR
 

Victor T. Wyatt