New approach to l'<i>C</i>-modified riboside scaffold via stereoselective functionalization of D-(+)-ribonic-y-lactone
作者:Arnaldo Alzérreca
DOI:10.1002/jhet.5570400218
日期:2003.3
ylmethylene)-2′,3′-O-isopropylidene-α-D-ribofuranose 2b. When subjected to deoxydative reaction conditions with boron trifluoride etherate in the presence of triethylsilane at −45° C, lactol 2b was converted into 2′,3′-O-isopro-pylidene-1′-deoxy-1′-(benzenesulfonylmethylene)-β-D-ribofuranose 4b with excellent stereocontrol over the anomeric carbon in moderate yield. This method has the potential for
我们描述了一种新型的核苷类似物的制备和光谱性质,其中苯基磺酰基亚甲基连接到PD-呋喃呋喃糖的1'-碳原子上。5-的糖基化Ö - (叔-butyldiphenylsilyl)-2,3- Ô异亚丙基d-ribofuranolactone磅苯基甲基锂砜在THF中在-60℃下,得到5- ø - (叔-butyldiphenylsilyl) -1'-(苯磺酰基亚甲基)-2',3' - O-异亚丙基-α-D-呋喃呋喃糖2b。当在三乙基硅烷存在下于-45°C与三氟化硼醚化物进行脱氧反应条件时,乳糖醇2b将其转化为2',3'- O-异丙基亚吡啶-1'-脱氧-1'-(苯磺酰基亚甲基)-β-D-呋喃呋喃糖4b,对端粒碳具有良好的立体控制,且产率适中。该方法具有潜力,可以开发出更多的衍生自1'-脱氧-β-D-呋喃核糖的有用探针,用于核酸研究和通过进一步磺化偶联的磺酰基进行反义治疗剂。