New process for the preparation of bipyrrolidinyl compounds of formula I wherein * signifies an asymmetric centre with an (R) or (S) configuration and X represents chlorine, bromine or iodine. The compounds of formula I are important building blocks for the production of useful products in the chemical and in the pharmaceutical industry. In particular they are useful for the production of antibacterial substances for example like vinylpyrrolidinone-cephalosporin derivatives.
1
新的制备含有式I的双
吡咯烷化合物的过程,其中*表示具有(R)或(S)构型的不对称中心,X代表
氯,
溴或
碘。式I的化合物是
化学和制药工业中生产有用产品的重要构建块。特别是它们对于生产抗菌物质非常有用,例如像
乙烯吡咯烷酮
头孢菌素衍
生物。1