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首页> 外文期刊>Advanced synthesis & catalysis >Polystyrene-Anchored Cinchona Ammonium Salts:Easily Recoverable Phase-Transfer Catalysts for the Asymmetric Synthesis of alpha-Amino Acids
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Polystyrene-Anchored Cinchona Ammonium Salts:Easily Recoverable Phase-Transfer Catalysts for the Asymmetric Synthesis of alpha-Amino Acids

机译:聚苯乙烯锚定的金鸡纳铵盐:α氨基酸不对称合成的易于回收的相转移催化剂

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摘要

Cinchonidine,epicinchonidine,cinchonine or quinine have been N-anchored to cross-linked polystyrene (Merrifield resin) or grafted polystyrene (Syn-Phase~(TM) Lanterns) affording polymer-supported chi-ral ammonium salts which are employed as phase-transfer catalysts in the asymmetric alkylation of N-(diphenylmethylene)glycine esters.These new polymeric catalysts can be easily recovered after the reaction by simple filtration and reused.
机译:辛可尼定,表氯可定,辛可宁或奎宁已被N锚定在交联的聚苯乙烯(Merrifield树脂)或接枝的聚苯乙烯(Syn-PhaseTM灯笼)上,提供了聚合物支撑的手性铵盐,可将其用作相转移N-(二苯基亚甲基)甘氨酸酯的不对称烷基化反应中的这些催化剂。这些新的聚合催化剂在反应后可通过简单过滤轻松回收并重复使用。

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