## Abstract Polymeric semiconducting materials are being utilized as components in a new generation of electronic devices. The generation of high quality polymeric semiconductors often involves transition metalβcatalyzed crossβcoupling reactions, which require long reaction times. Microwave heating
Rapid microwave-assisted preparation of amino-functionalized polymers
β Scribed by Natalie Ljungdahl; Laura Martikainen; Nina Kann
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- French
- Weight
- 257 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
Two different methods for the rapid microwave-assisted amination of halide-functionalized polymers were investigated. Nucleophilic substitution by phthalimide, followed by ring opening with methylamine to liberate the free amine, afforded amino-substituted polymers with up to 76% conversion. The second method involves nucleophilic substitution with azide ions and subsequent treatment with triphenylphosphine. The latter method was found to be more efficient, with up to 99% conversion in favourable cases and with a reaction time of 2 Γ 30 min.
π SIMILAR VOLUMES
A series of functionalized resins were synthesized from Merrifield resin by virtue of microwave irradiation. A significant reduction in reaction time was achieved. This method provides a rapid transformation of functionalized resin in solid-phase synthesis.
A robust, regioselective synthesis of 3-amino-1,2,4-triazoles is described. This reaction employs a key intermediate 2, which is coupled to carboxylic acids in good yields to afford intermediates 3a-d. These entities, in turn, react with a variety of hydrazines or hydrazine hydrochlorides to provide