Polymer-Supported Crown Ethers: 5. Synthesis of Lariat Azacrown Ethers
Shim JH, Chung KB, Tomoi M
고분자 물질로 지지된 크라운 에테르류: 5. Lariat Azacrown Ether의 합성
심재우, 정광보, 友井正男
Abstract
Immobilization methods of lariat azacrown ether, containing oxyethylene spacer in the sidearm of crown ring, on the polymer matrix were studied. Crown ethers bound to polystyrene resins by oxyethylene spacer were obtained by the reaction of monoazacrown ether with 2-tosyloxyethoxy- or 2-(2-tosyloxyethoxy)ethoxy methylated polystyrene resins, derived from tosylation of 2-hydroxyethoxy- or 2-(2-hydroxyethoxy)ethoxymethylated polystyrene resins. This method presented a convenient route to immobilize various crown ether structure on polystyrene supports by poly(oxyethylene) spacers. Polymer supported simple crown ethers without oxygen donors in the spacer chain corresponding to the above lariat azacrowns were obtained by the reaction of crosslinked ω-bromoalkylated polystyrene resins with monoazacrown ether.