New types of spin-labelled sugar and nucleoside analogs: Pyrrolidine, morpholine and piperidine N-Oxyls
作者:Jean M.J. Tronchet、Guido Zosimo-Landolfo、Mirna Balkadjian、Alessandra Ricca、Martina Zsély、Françoise Barbalat-Rey、Daniel Cabrini、Patrick Lichtle、Michael Geoffroy
DOI:10.1016/s0040-4039(00)79882-0
日期:1991.8
Analogs of blocked furanose (20) or pyranose sugars (i.e. 15) and of nucleosides (i.e. 23) in which the ring oxygen has been replaced with a -N(OH)-bridge have been prepared in generally good yields by a general reductive cyclization procedure preserving the configuration of the preexistant asymetric centers and proceedings stereoselectively (in more favorable cases stereospecifically) when creating
通过一般的还原环化,通常以良好的收率制备了封闭的呋喃糖(20)或吡喃糖(即15)和核苷(即23)的类似物,其中环氧已被-N(OH)-桥取代。保留现有不对称中心的配置的过程,并在创建新的不对称中心时进行立体选择(在更有利的情况下,立体定向)进行处理。标题化合物被氧化成氮氧化物自由基,提供了可用的ESR光谱。