Compounds represented by the general formulae:
wherein R means a lower alkyl group, Xs are identical to or different from each other and denote individually a hydrogen or halogen atom, Pr denotes a protecting group for a hydroxyl group, Q stands for an oxygen atom or CH2, M stands for a hydroxyl or leaving group, and A stands for CH or a nitrogen atom, or a salt thereof, and processes for the preparation thereof.
通式所代表的化合物:
其中 R 表示低级烷基,Xs 彼此相同或不同,并分别表示氢原子或卤素原子,Pr 表示羟基的保护基团,Q 表示氧原子或
CH2,M 表示羟基或离去基团,A 表示 CH 或氮原子,或其盐类,以及其制备方法。