With increasing interest in the control of the conformations of nucleicacids to define active riboswitch or siRNA, we present herein our efforts towards the stereocontrolled synthesis and conformational analysis of ribodinucleotides in which a and beta torsional angles are constrained within a dioxaphosphorinane structure (ribo-a,beta-D-CNA). The crystal structure analysis of one a,beta-D-CNA TU dimer
随着对控制核酸构象以定义活性核糖开关或 siRNA 的兴趣日益浓厚,我们在此展示了我们对核二核苷酸的立体控制合成和构象分析的努力,其中 a 和 β 扭转角被限制在二氧杂磷烷结构(ribo-a ,β-D-CNA)。一个 a,beta-D-CNA TU 二聚体的晶体结构分析证明了新创建的不对称中心的绝对立体化学。NMR 和 CD 分析允许完全分配和确定 a,beta-D-CNA UU 非对映异构体中的扭转角。