申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US04958029A1
公开(公告)日:1990-09-18
A process for producing a compound of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group or an aralkyl group, and R.sup.2 is a hydrogen atom or a hydroxyl-protecting group, or a salt thereof, which comprises removing from a compound of the formula: ##STR2## wherein R.sup.3 is a hydrogen atom or a hydroxyl-protecting group, R.sup.4 and R.sup.5 which may be the same or different are N-protecting groups selected from the group consisting of lower alkyl groups and aralkyl groups, and X.sup..crclbar. is an anion, the N-protecting group(s), if necessary, together with the hydroxyl-protecting group.
一种制备化合物的方法,该化合物的化学式为:##STR1## 其中R.sup.1是氢原子,低级烷基或芳基烷基,R.sup.2是氢原子或羟基保护基,或其盐,包括从化合物中去除的步骤:##STR2## 其中R.sup.3是氢原子或羟基保护基,R.sup.4和R.sup.5可能相同或不同,是从下列群组中选择的N-保护基:低级烷基和芳基烷基,X.sup..crclbar. 是阴离子,必要时连同羟基保护基。