A new method of anomeric protection and activation based on the conversion of glycosyl azides into glycosyl fluorides
作者:Wolfgang Bröder、Horst Kunz
DOI:10.1016/0008-6215(93)84071-d
日期:1993.10
Glycosyl azides provide reliable anomeric protection stable to conditions for hydrolytic removal of ester groups, for reductive opening or release of acetalic diol protection, for the introduction of ether-type protection, and for glycosylation processes. The utility of this anomeric protection is further enhanced as glycosyl azides may be converted into glycosyl fluorides, which can be activated for
糖基叠氮化物提供稳定的可靠的端基异构保护,该条件稳定于以下条件:水解除去酯基,还原性打开或释放缩醛二醇保护,引入醚型保护以及糖基化过程。由于可将糖基叠氮化物转化为可被糖基化反应活化的糖基氟化物,因此进一步提高了该端基保护的效用。为此,已经将糖基叠氮化物与乙酰二羧酸二叔丁酯进行了1,3-偶极环加成。用氟化氢-吡啶配合物处理时,N-糖基三唑衍生物直接得到糖基氟化物。