Compounds of the formula (II):
or a salt thereof, wherein R is hydrogen or an alkyl group containing up to 6 carbon atoms; X is a covalent bond or oxygen; Y is -(CH2)n- where n is 0 or an integer from 1 to 5 wherein one carbon atom not bound to the nitrogen atom may be optionally substituted with a hydroxy group; and Z is hydrogen or halogen are useful intermediates in the preparation of pharmacologically active compounds described in European Patent Application No 79302141.
式 (II) 的化合物:或其盐,其中 R 是氢或最多含有 6 个碳原子的烷基;X 是共价键或氧;Y 是-(
CH2)n-,其中 n 是 0 或 1 至 5 的整数,其中未与氮原子结合的一个碳原子可任选被羟基取代;Z 是氢或卤素,是制备欧洲专利申请第 79302141 号所述药理活性化合物的有用中间体。