The present invention concerns compounds of the formula ##STR1## wherein X is hydrogen or halogen; R.sub.1 is hydrogen, halogen or trifluoromethyl; R.sub.2 is hydrogen or lower alkyl; and R.sub.3 is hydrogen, --COO lower alkyl or CON(R.sub.4).sub.2 wherein R.sub.2 is lower alkyl or hydrogen and may be different and the pharmaceutically acceptable salts thereof. Also provided are methods for the preparation of these compounds as well as pharmaceutical formulations which contain the active compounds of this invention. The compounds of the formula illustrated above are useful as anxiolytics, anticonvulsants, muscle relaxants and sedative agents.
本发明涉及公式为##STR1##的化合物,其中X为氢或卤素; R.sub.1为氢,卤素或三
氟甲基; R.sub.2为氢或较低的烷基; R.sub.3为氢,--COO较低的烷基或CON(R.sub.4).sub.2,其中R.sub.2是较低的烷基或氢,可能不同,并且其药学上可接受的盐。还提供了制备这些化合物的方法以及包含本发明活性化合物的制药配方。上述公式的化合物可用作抗焦虑剂,抗惊厥剂,肌肉松弛剂和镇静剂。