作者:Małgorzata Bogucka、Petr Nauš、Wimal Pathmasiri、Jharna Barman、Jyoti Chattopadhyaya
DOI:10.1039/b511406c
日期:——
Efficient and practical large scale synthesis of suitably protected 1′,2′-oxetane locked purine and pyrimidine nucleosides for incorporation in oligo-DNA or -RNA by solid-phase synthesis is reported. A high regio and stereoselectivity with preferential formation of the β-anomer in the glycosylation reaction, using the Vorbrüggen procedure, was achieved by a convergent synthetic procedure with orthogonal protection strategy using either 1,2-di-O-acetyl-3,4-O-isopropylidene-6-O-(4-toluoyl)-D-psicofuranose or 2-O-acetyl-6-O-benzyl-1,3,4-tri-O-(4-toluoyl)-D-psicofuranose as the glycosyl donor.
据报道,有效且实用的大规模合成适当保护的 1',2'-氧杂环丁烷锁定的嘌呤和嘧啶核苷,用于通过固相合成掺入寡聚 DNA 或 RNA。使用 Vorbrüggen 程序,通过采用 1,2-二-O-乙酰基-3,4- 的正交保护策略的收敛合成程序,实现了高区域选择性和立体选择性,并在糖基化反应中优先形成 β-端基异构体。 O-异亚丙基-6-O-(4-甲苯酰基)-D-呋喃酮糖或2-O-乙酰基-6-O-苄基-1,3,4-三-O-(4-甲苯酰基)-D-呋喃酮糖糖基供体。