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    • 7. 发明授权
    • Reagent and process for protecting nucleoside hydroxyl groups
    • 用于保护核苷羟基的试剂和方法
    • US06800751B2
    • 2004-10-05
    • US10120649
    • 2002-04-11
    • Yogesh S. SanghviEmmanuel A. TheodorakisKe Wen
    • Yogesh S. SanghviEmmanuel A. TheodorakisKe Wen
    • C07H2100
    • C07H19/06C07H19/16
    • Silylating reagents having a group other than a divalent oxygen separating two silyl groups provide regioselective protection of reactive groups under robust conditions, such as basic conditions used in alkylation, acylation and deoxygenation. In particular, silylating reagents having a group other than oxygen separating two silyl groups are useful for protecting two hydroxy groups of a ribonucleic or deoxyribonucleic acid. Alkylation of a 2′-hydroxy group of a ribonucleoside protected with the inventive silylating agents in the presence of an excess of a mild hindered base such as sodium HMDS may be carried out without protecting the exocyclic amine and oxo functionalities of nucleobases.
    • 具有分离两个甲硅烷基的二价氧以外的基团的硅烷化试剂在稳定的条件下,例如在烷基化,酰化和脱氧中使用的碱性条件下提供反应性基团的区域选择性保护。 特别地,具有分离两个甲硅烷基的氧以外的基团的甲硅烷基化试剂可用于保护核糖核酸或脱氧核糖核酸的两个羟基。 在过量的温和受阻碱例如HMDS的存在下,用本发明的甲硅烷基化剂保护的核糖核苷的2'-羟基的烷基化可以在不保护核碱基的环外胺和氧代官能团的情况下进行。