cycloaddition of C-substituted nitrones with allyl nucleobases. The N-methyl-C-ethoxycarbonyl nitrone 1, and the C-α-silyloxymethyl-N-methyl nitrone 7 have been exploited: the stereochemical features of the obtained nucleosides are dependent on the nature of the dipole. The results obtained with DFT calculations fully agree with the experimental results and successfully reproduce the experimentally observed
一类新的均聚物Ñ,ö核苷已被设计,基于所述1,3-偶极环加成Ç取代与烯丙基的核碱基的硝酮。所述Ñ甲基Ç -乙氧基羰基硝酮1和Ç -α-silyloxymethyl- ñ -甲基硝酮7已经被利用:所得到的核苷的立体
化学特征依赖于偶极子的性质。通过DFT计算获得的结果与实验结果完全吻合,并成功地再现了实验观察到的对硝基的内/外选择性的逆转1和7。