A New Protocol for Selective Cleavage of Acyl Protecting Groups in 2′-O-Modified 3′,5′-O-(Tetraisopropyldisiloxane-1,3-diyl)ribonucleosides
作者:S. Mikhailov、M. Drenichev、I. Kulikova、G. Bobkov、V. Tararov
DOI:10.1055/s-0030-1258270
日期:2010.11
of choice for selective deacylation of N- or/and O-acyl protected nucleosides without notable cleavage of 3′,5′-TIPDS group. Several examples of the developed protocol for the preparation 2′-O-modified nucleosides with overall high yields are presented. nucleosides - blocking group stability - tetraisopropyldisiloxane-1,3-diyl - protecting group - N-deacylation - O-deacylation
研究了在甲醇和乙醇中氨/胺溶液中核苷中四异丙基二硅氧烷-1,3-二基(TIPDS)保护的稳定性。在环境温度下的氨甲醇中,观察到TIPDS的部分裂解。当使用乙醇代替甲醇时,这种不希望的副反应被完全抑制。发现市售的8M甲胺-乙醇溶液是N-或/和O-酰基保护的核苷选择性脱酰而不显着裂解3',5'-TIPDS基团的选择试剂。给出了制备具有整体高产率的2'- O-修饰的核苷的已开发方案的几个实例。 核苷-封端基团稳定性-四异丙基二硅氧烷-1,3-二基-保护基-N-脱酰-O-脱酰