Although the deprotection of amides by hydrazinolysis is a well established method in carbohydrate chemistry, this reaction is dependent upon the nearby substituents. In our facile synthesis of intermediate benzyl 2-amino-3-azido-4-O-p-methoxybenzyl-6-O-benzyl-2,3-dideoxy-α-d-glucopyranoside (3), we found that the use of trifluoroacetamides provided a more efficient protection strategy.
尽管通过
肼解作用使酰胺脱保护是
碳水化合物化学中公认的方法,但该反应取决于附近的取代基。在我们轻松合成中间体苄基2-
氨基-3-
叠氮基-4- Op-甲氧基苄基-6- O-苄基-2,3-二脱氧-α- d-
吡喃
葡萄糖苷(3)时,我们发现使用了三
氟乙酰胺更有效的保护策略。