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Dendritic aliphatic polyethers as high-loading soluble supports for carbonyl compounds and parallel membrane
Rainer Haag1, Alexander Sunder, André Hebel
1Freiburger Materialforschungszentrum und Institut für Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Strasse 21, 79104 Freiburg, Germany. haag@fmf.uni-freiburg.de
Journal of Combinatorial Chemistry
|March 12, 2002
Summary
Dendritic polyglycerol serves as a novel polymeric support for large-scale synthesis, enabling easy purification and high-yield reactions. This versatile material offers efficient recovery and orthogonal use in solution-phase organic synthesis.
Area of Science:
- Polymer Chemistry
- Organic Synthesis
Background:
- Traditional solid-phase synthesis often requires complex linker strategies.
- Developing efficient and recoverable polymeric supports is crucial for scalable organic synthesis.
Purpose of the Study:
- To introduce dendritic polyglycerol as a novel, high-loading polymeric support for solution-phase organic synthesis.
- To demonstrate the direct coupling of carbonyl compounds and the material's utility in library synthesis and purification.
Main Methods:
- Utilized dendritic polyglycerol with terminal 1,2-diol groups for direct coupling with carbonyl compounds.
- Employed a parallel dialysis apparatus for purification of polymer-bound products.
- Demonstrated polymer-supported nucleophilic substitutions and Suzuki couplings.
- Investigated acid-catalyzed acetal cleavage using a solid-phase acidic ion-exchange resin.
Main Results:
- Achieved direct coupling of carbonyl compounds with high yields and loading capacities up to 3.5 mmol ketone/g.
- Demonstrated efficient purification via parallel dialysis and high product yields (>95% recovery) after cleavage.
- Showcased orthogonal compatibility with conventional solid-phase reagents.
Conclusions:
- Dendritic polyglycerol is a versatile and efficient polymeric support for large-scale organic synthesis.
- The material facilitates direct coupling, easy purification, and high recovery, offering an advantage over traditional methods.