A problem to be solved by the present invention is to provide a process for producing an optically active bicyclic urea compound useful as an intermediate for β-lactamase inhibitor, in a simple and easy manner with high efficiency.
The present invention includes reacting a specific ester compound with a specific amine in the presence of a metal alkoxide and/or an alkaline earth metal salt to produce the corresponding amide compound, which is then reacted with phosgene or a phosgene equivalent, followed by, if necessary, treatment with an acid or a base, to produce an optically active bicyclic urea compound. This makes it possible to produce an optically active bicyclic urea compound in a simple and easy manner with high efficiency and in high optical purity, without using expensive reagents such as catalysts and condensation agents, and without passing through protection and deprotection steps.
本发明要解决的一个问题是提供一种工艺,以简单易行的方式高效生产一种光学活性双环
脲化合物,该化合物可用作β-内酰胺酶抑制剂的中间体。
本发明包括在金属氧化物和/或碱土
金属盐存在下,使特定酯化合物与特定胺反应,生成相应的酰胺化合物,然后与
光气或
光气当量物反应,必要时再用酸或碱处理,生成光学活性双环
脲化合物。这样就有可能以简单易行的方式生产出光学活性双环
脲化合物,而且效率高、光学纯度高,无需使用催化剂和
缩合剂等昂贵的试剂,也无需经过保护和脱保护步骤。