描述了使用液相平行合成法制备受天然产物启发的核苷类似物。开发了包含炔烃和 N 保护氨基部分的关键中间体,以允许使用点击化学和脲或酰胺键形成进一步的骨架和取代基多样性。使用固相萃取完成快速纯化。获得的文库包含 80 个包含两个多样性位置和一个手性中心的分子,每个分子都以良好的纯度和可接受的总收率有效制备。还进行了细菌形态学研究。
Oligonucleotide Analogues with Integrated Bases and Backbone. Part 13
作者:Xiaomin Zhang、Bruno Bernet、Andrea Vasella
DOI:10.1002/hlca.200690259
日期:2006.12
The self-complementary UA and AU dinucleotide analogues 41–45, 47, 48, and 51–60 were prepared by Sonogashira coupling of 6-iodouridines with C(5′)-ethynylated adenosines and of 8-iodoadenosines with C(5′)-ethynylated uridines. The dinucleotide analogues associate in CDCl3 solution. The C(6/I)-unsubstituted AU dimers 51 and 54 prefer an anti-oriented uracilyl group and form stretched linear duplexes
A linear and a convergent synthesis of uridine-derived backbone-base-dedifferentiated (backbone including) oligonucleotide analogues were compared. The Sonogashira cross-coupling of the alkyne 1 and the iodide 2 gave the dimer 4 that was C-desilylated and again coupled with 2 to give the trimer 6 (Scheme 1). Repeating this linear sequence led to the pentamer 10. Coupling yields were satisfactory up
Oligonucleotide Analogues with Integrated Bases and Backbone. Part 14
作者:Xiaomin Zhang、Bruno Bernet、Andrea Vasella
DOI:10.1002/hlca.200790081
日期:2007.4
self-complementary tetrameric propargyl triols 8, 14, 18, and 21 were synthesized to investigate the duplex formation of self-complementary, ethynylene-linked UUAA, AAUU, UAUA, and AUAU analogues with integratedbases and backbone (ONIBs). The linear synthesis is based on repetitive Sonogashira couplings and C-desilylations (34–72% yield), starting from the monomeric propargyl alcohols 9 and 15 and the iodinated