Synthesis of the <i>C</i>-Glycosidic Analogue of Adenophostin A and Its Uracil Congener as Potential IP<sub>3</sub> Receptor Ligands. Stereoselective Construction of the <i>C</i>-Glycosidic Structure by a Temporary Silicon-Tethered Radical Coupling Reaction
作者:Hiroshi Abe、Satoshi Shuto、Akira Matsuda
DOI:10.1021/jo0001333
日期:2000.7.1
and its uracil congener 10 was achieved via a temporary silicon-tethered radical coupling reaction as the key step. Phenyl 3,4, 6-tri-O-(p-methoxybenzyl)-1-seleno-beta-D-glucopyranoside (27) and 3-deoxy-3-methylene-1, 2-O-isopropylidene-alpha-D-erythro-pentofuranose (30) were connected by a dimethylsilyl tether to give the radical coupling reaction substrate 24, which was successively treated with Bu(3)SnH/AIBN
腺磷蛋白A(一种非常有效的IP(3)受体激动剂)及其尿嘧啶同类物10的C-糖苷类似物9的合成是通过暂时的硅链自由基偶联反应作为关键步骤而实现的。苯基3,4,6-三-O-(对甲氧基苄基)-1-硒基-β-D-吡喃葡萄糖苷(27)和3-脱氧-3-亚甲基-1,2-O-异亚丙基-α-D-通过二甲基甲硅烷基系链连接赤型-五呋喃糖(30),得到自由基偶联反应底物24,将其依次用苯中的Bu(3)SnH / AIBN和THF中的TBAF处理,得到具有所需(3alpha)的偶联产物25 ,1'alpha)-组态为主要产品。通过Vorbrüggen方法引入腺嘌呤或尿嘧啶碱,并通过亚磷酰胺方法将羟基磷酸化,从25种目标9和10合成。