Novel process for the preparation of azetidin-2-ones of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently from each other are hydrogen, or an organic group linked to the ring carbon via a carbon atom, a nitrogen atom or an oxygen atom, characterized in that a corresponding 4-acyloxyazetidin-2-one, which is substituted by a group --O--CO--R.sup.3 at the 4-position, wherein R.sup.3 is hydrogen or an organic radical stable at the reaction conditions, is reacted with a complex metal hydride comprising reactive hydride ions, such as, lithium borohydride, sodium borohydride, potassium borohydride, zinc borohydride or tetraorganoammonium borohydride.
制备azetidin-2-酮的新方法,其
化学式为##STR1##其中R.sup.1和R.sup.2独立地是氢,或通过碳原子、氮原子或氧原子与环碳相连的有机基团,其特征在于,将相应的4-酰氧基azetidin-2-酮与在4位被一个--O--CO--R.sup.3基团取代的基团反应,其中R.sup.3是在反应条件下稳定的氢或有机基团,所用的试剂是包含反应性
氢化物离子的复杂
金属
氢化物,如
硼氢化
锂、
硼氢化钠、
硼氢化钾、
硼氢化锌或四有机
铵硼氢化物。