Methods for the alkylation of alcohols, amines and thiols by the use of cyclic sulfates are disclosed. The alkylated sulfates formed are versatile intermediates which may be further elaborated by methods of the invention. In particular, methods for the alkylation of the 2′, 3′ or 5′-hydroxy position of nucleosides and nucleoside analogs with cyclic sulfates to form the 2′, 3′ or 5′-O-alkyl sulfate modified compounds are disclosed. Displacement of the 2′,3′ or 5′-O-sulfate with a nucleophile provides 2′, 3′ or 5′-O-modified nucleosides and nucleoside analogs useful for the synthesis of oligomeric compounds having improved hybridization affinity and nuclease resistance.
本发明揭示了使用环状
硫酸酯对醇、胺和
硫醇进行烷基化的方法。形成的烷基化
硫酸酯是多功能的中间体,可以通过本发明的方法进一步加工。特别地,揭示了使用环状
硫酸酯对核苷和核苷类似物的2'、3'或5'-羟基位置进行烷基化,形成2'、3'或5'-O-烷基
硫酸酯修饰化合物的方法。用亲核试剂取代2'、3'或5'-O-
硫酸酯,提供了用于合成具有改善杂交亲和力和
核酸酶抗性的寡聚物化合物的2'、3'或5'-O-修饰核苷和核苷类似物。