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Magnetic silyl scaffold enables efficient recycling of protecting groups

机译:磁性硅烷基支架可有效回收保护基

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A novel organic/inorganic hybrid material comprising carbon-coated cobalt nanoparticles and a poly(benzylchloride)styrene shell is the first magnetic support that complies with important requirements for immobilized reagents and scavengers, that is, stability under harsh conditions (e.g., acids), sufficient loading (up to 2 mmol g~(-1)), and satisfying magnetization. The durability of the scaffold was demonstrated by immobilization of a trialkylsilane reagent, which served as a "magnetic" protecting group for a number of primary and secondary alcohols. Importantly, the scaffold could be efficiently separated, recycled, and reused after alcohol cleavage (HF·pyridine) via regeneration of the silyl chloride moiety with BCl _3.
机译:包含碳包覆的钴纳米颗粒和聚(苄基氯)苯乙烯壳的新型有机/无机杂化材料是第一种磁性载体,符合固定化试剂和清除剂的重要要求,即在苛刻条件下(例如酸)​​的稳定性,足够的负荷(高达2 mmol g〜(-1)),并满足磁化强度。支架的耐久性通过固定三烷基硅烷试剂来证明,该试剂充当许多伯醇和仲醇的“磁性”保护基。重要的是,在醇裂解(HF·吡啶)之后,通过用BCl 3再生甲硅烷基氯部分,可以有效地分离,回收和再利用支架。

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