METHOD FOR PREPARING AZETIDINONE DERIVATIVE

摘要

A method for preparing a compound represented by the following formula: (III) [wherein R¹ represents a protecting group for a hydroxyl group, and R² and R³ may be the same or different from each other and represent a hydrogen atom or a lower alkyl group], characterized in that it comprises reacting a compound represented by the following formula: (I) [wherein R¹ represents the same meaning as described above, and Z represents an eliminating group] with a compound represented by the following formula: (II) [wherein R² and R³ represent the same meaning as described above] in the presence of a base and a magnesium catalyst.