The nucleophilic addition of alkyl, benzyl, and allyl organozinc reagents to protected pyridinium riboses proceeds under mild conditions and with yields of >90% in several cases and complete regioselectivity for the 4-position.

中文翻译：

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吡啶鎓核糖的区域选择性烷基化

烷基、苄基和烯丙基有机锌试剂与受保护的吡啶鎓核糖的亲核加成反应在温和条件下进行，在某些情况下产率 >90%，并且对 4 位具有完全的区域选择性。