Convenient synthesis of N2-isobutyryl-2′-O-methyl guanosine by efficient alkylation of O6-trimethylsilylethyl-3′,5′-di-tert-butylsilanediyl guanosine
作者:Ivan Zlatev、Jean-Jacques Vasseur、François Morvan
DOI:10.1016/j.tet.2007.08.006
日期:2007.11
We present a novel route for the synthesis of N2-isobutyryl-2′-O-methyl guanosine, introducing 3′,5′-di-tert-butylsilyl and O6-trimethylsilylethyl groups as efficient protections during the 2′-O-methylation step with NaH/CH3I. These protections were then removed simultaneously in a single step with TBAF. The eight-step synthesis is easy to perform, employing convenient commercially available reagents;
我们提出了一种新颖的合成N 2-异丁酰基-2' - O-甲基鸟苷的途径,引入了3',5'-二叔丁基甲硅烷基和O 6-三甲基甲硅烷基乙基作为2'- O-期间的有效保护剂。用NaH / CH 3 I进行甲基化步骤。然后用TBAF在单个步骤中同时除去这些保护基。八步合成很容易进行,使用方便的市售试剂。粗混合物的纯度令人满意,因此仅需进行三次色谱纯化。从鸟苷中以25%的总收率获得标题化合物。