【摘要】 本文以交联的氯甲基化聚苯乙烯树脂为原料,合成了四种类型的含两个带α-H碳原子的季鏻盐树脂(Ⅰ)、(Ⅱ)、(Ⅲ)、(Ⅳ),它们在碱的作用下,与醛的Wittig反应表现出不同的位置选择性:季鏻盐树脂(Ⅰ)和(Ⅳ)与醛反应只生成带烯键的聚合物;季鏻盐树脂(Ⅲ)与醛反应只生成低分子烯烃产物;而季鏻盐树脂(Ⅱ)与醛反应则生成低分子烯烃产物又生成带烯键的聚合物。更多还原

【Abstract】 Polymer-supported phosphonium salts containing two α-H linked carbon atoms ( Ⅰ), (Ⅱ), (Ⅲ), (Ⅳ) have been synthesized on divinylbenzene cross-linked chloromethylated polystyrene.The Wittig reactions of resin (I) , resin (Ⅱ) , resin (Ⅲ) and resin (Ⅳ) show different position selectivity.The Wittig reactions of resin ( I ) and resin (Ⅳ) only produce polymers containing carbon-carbon double bond; The Wittig reactions of resin ( Ⅲ ) only produce low molecule alkenes; The Wittig reactions of resin ( Ⅱ) produce both polymers containing carbon-carbon double bond and low molecule alkenes.(?) -C6H4-CH2PPh2CH2CH2CH2CH3Br- (Ⅰ)(?)-C6H4-CH2PPh2CH2CH = CH2Br- (Ⅱ)(?)-C6H4-CH2PPh2CH2C6H5BR- (Ⅲ)(?)-C6H4-CH2PPh2CH2COOEtBR- (Ⅳ)更多还原