Synthesis of 4-substituted phenyl 3,6-anhydro-1,3-dithio-d-glucofuranosides and -pyranosides as well as 2,6-anhydro-1,2-dithio-α-d-altrofuranosides possessing antithrombotic activity
作者:Éva Bozó、Sándor Boros、János Kuszmann
DOI:10.1016/s0008-6215(00)00218-4
日期:2000.11
altrofuranose (40). Glycosidation of 4-cyanobenzethiol with 32alpha in the presence of trimethylsilyl triflate as promoter afforded 4-cyanophenyl 3,6-anhydro-2,4-di-O-(4-nitrobenzoyl)-1,3-dithio-beta-D-glucopyranoside as a minor component only, besides 4-cyanophenyl 3,6-anhydro-2-S-(4-cyanophenyl)-4-O-(4-nitrobenzoyl)-1,2,3-trithio-beta-D-glucopyranoside. When boron trifluoride etherate was used as
从D-葡萄糖开始合成1,2,5-Tri-O-乙酰基-3,6-脱水-3-硫代-D-葡萄糖呋喃糖,并用作4-氰基和4-硝基苯硫醇糖基化的供体。在后一反应中,除了4-硝基苯基2,5-二-O-乙酰基-3,6-脱水-1,3-二硫代-D-葡糖呋喃糖苷的异头混合物外,相应的2,6-脱水-1,还获得了通过糖部分的重排形成的2-二硫代-D-呋喃呋喃糖苷。在三氟乙酸水溶液水解甲基3,6-脱水-2,4-二-O-(4-硝基苯甲酰基)-3-硫代-α-D-吡喃葡萄糖苷的糖苷键期间,可以观察到类似的重排,得到除1-O-乙酰基-3,6-脱水-2,4-二-O-(4-硝基苯甲酰基)-3-硫代-α-D-吡喃葡萄糖(32alpha),1,1,5-三- O-乙酰基-3,6-脱水-2,4-二-O-(4-硝基苯甲酰基)-3-硫代-D-葡萄糖,甲基3,6-脱水-2,4-二-O-(4-硝基苯甲酰基)-3-硫代β-D-吡喃葡萄糖苷和1,5-二-O-乙酰基-2