作者:Thomas Bachmann、Michael Rychlik
DOI:10.1016/j.carres.2020.107929
日期:2020.3
pyridoxine-5'-β-d-glucoside (5'-β-PNG) was investigated using various glucoside donors and promoters. Hereby, the combination of α4,3-O-isopropylidene pyridoxine, glucose vested with different leaving and protecting groups and the application of stoichiometric amounts of different promoters was examined with regards to the preparation of the twofold protected PNG. Best results were obtained with 2,3,4,6-te
使用多种葡萄糖苷供体和促进剂研究了吡ido醇5'-β-d-葡萄糖苷(5'-β-PNG)的化学合成。因此,关于双重保护的PNG的制备,研究了α4,3-O-异亚丙基吡啶并恶嗪,具有不同的离去和保护基的葡萄糖的组合以及化学计量的不同启动子的应用。在0°C(59%)下,使用2,3,4,6-四-O-乙酰基-d-吡喃葡萄糖基氟和三氟化硼醚化物(2.0当量)作为促进剂可获得最佳结果。用乙腈/水中的钾/氢氧化钠逐步完成脱保护,然后用甲酸进行酸水解,从而化学合成5'-β-PNG。