Synthesis and deprotection of β-silylethyl protected O,O,O- and O,O,S-trialkylphosphorothioates
作者:Achim H. Krotz、Douglas L. Cole、Vasulinga T. Ravikumar
DOI:10.1016/0040-4039(96)00228-6
日期:1996.3
2-(diphenylmethylsilyl)ethyl protected thymidyl-thymidine phosphorothioate dimers are easily accessible and stable under conditions used in oligophosphorothioate synthesis. Deprotection with ammonium hydroxide occurs through β-fragmentation. Methylamine and tetrabutyl-ammonium fluoride rapidly and selectively remove the DPSE protecting group of O,O,O- and O,O,S-trialkylphosphorothioates.
在低聚硫代磷酸酯合成中使用的条件下,官能化的2-(二苯基甲基甲硅烷基)乙基保护的硫代磷酸胸苷-二聚体易于获得和稳定。氢氧化铵的脱保护作用是通过β片段化来实现的。甲胺和四丁基氟化铵可快速选择性地除去O,O,O-和O,O,S-三烷基硫代磷酸酯的DPSE保护基。