Total synthesis methods employ 7-amino (6-amino in the case of a penicillin derivative) group in the alpha configuration. The instant invention provides a general route for preparing the 7.beta.-amino (or 6.beta.-amino) compound, through the formation of an imino-containing intermediate, followed by hydrolysis to the desired epimer. Novel intermediate products are provided. The compounds having the desired beta epimer can be converted to acylamino-antibiotics.
总合成方法采用α构型中的7-
氨基(在
青霉素衍
生物的情况下为6-
氨基)基团。本发明提供了一种制备7-β-
氨基(或6-β-
氨基)化合物的通用途径,通过形成含
亚胺的中间体,随后
水解成所需的对映体。提供了新颖的中间体产物。具有所需β对映体的化合物可转化为酰
氨基抗生素。