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Abstract

An acetamide derivative of the formula (I): ##STR1## wherein X is --0-- or --NR.sub.4 --, R.sub.1 is H, lower alkyl, lower alkenyl or cyclolalkyl-lower-alkyl, R.sub.2 is lower alkyl, cycloalkyl, substituted or unsubstituted phenyl, etc., R.sub.3 is H, lower alkyl or hydroxy-lower alkyl, R.sub.4 is H, lower alkyl, etc., R.sub.5 is H, lower alkyl, lower alkenyl, hydroxy-lower alkyl, etc., R.sub.6 is H, lower alkyl, CF.sub.3, substituted or unsubstituted phenyl, or R.sub.5 and R.sub.6 may optionally combine to form --(CH.sub.2)n--, R.sub.7 is H, halogen, lower alkyl, lower alkoxy, CF.sub.3, OH, NH.sub.2, etc., R.sub.8 is H, halogen, lower alkyl or lower alkoxy, or a pharmaceutically acceptable acid addition salt thereof. The compounds of the present invention selectively act on the peripheral-type BZ.omega..sub.3 -receptor, and show excellent pharmacological activities, and hence, they are useful in the prophylaxis or treatment of central nervous disorders such as anxiety-related diseases, depression, epilepsy, etc.

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First Claim