| 摘要 |
<p>Cpds. of formula (I):- (where R1 is H, halogen, NO2, CN, lower alkoxy or CF3; R2 is pyridyl or R5, R6-phenyl in which R5 and R6 are H, halogen 1-2C alkyl or CF3; R3 is H or 1-4C alkyl; R4 is 1-4C alkyl, 3-6C cycloalkyl, (3-6C cycloalkyl)-(1-4C alkyl), aryl or aralkyl; m is 1 or 2; and n is 1,2,3 or 4) and their salts with acids, are useful as tranquillisers, sedatives, muscle relaxants, spasmolytics and hypnotics, and are produced in good yields by condensing a ketone of formula (II) with a 2,5-oxazolidinedione of formula (III) and opt. converting the product into a salt with (in)organic acid.</p> |
