Synthesis of phosphoric acid diesters of 7β- hydroxycholesterol and of carbohydrates
作者:Xavier Pannecoucke、Gaby Schmitt、Bang Luu
DOI:10.1016/s0040-4020(01)89687-3
日期:——
phosphoramidite method (with protected C-1, 2, 3, 4 hydroxyl groups for the carbohydrates). As the protection of the sugars increased the length of the synthesis, we decided to use the hydrogen-phosphonate methodology which leads to a selective phosphorylation at the primary alcohol of carbohydrates and avoids the use of protected carbohydrates. Compound 2 was synthesized in good yield. However compound 1, probably
为了通过将7β-羟基胆固醇的作用定位于特定器官来增强7β-羟基胆固醇的抗肿瘤功效,通过亚磷酰胺法合成了3(7β-羟基胆固醇基)和6(半乳糖吡喃糖基)1或6(甘露吡喃糖基)2的磷酸酯(带有保护的C-1、2、3、4个羟基的碳水化合物)。由于糖的保护增加了合成的时间,我们决定使用膦酸氢盐方法,该方法可导致碳水化合物的伯醇选择性磷酸化,并避免使用受保护的碳水化合物。化合物2以高收率合成。然而,可能由于空间位阻的化合物1不能通过该第二种方法获得。