Compounds of the formula ##STR1## which are useful intermediates in the preparation of compounds of the formula ##STR2## which are useful as central nervous system depressants, tranquilizers, sedatives and muscle relaxants.
式为##STR1##的化合物是制备式为##STR2##的化合物的有用中间体,后者在中枢神经系统
抑制剂、镇静剂、催眠剂和肌肉松弛剂方面有用。