Compounds of the formula I: ##SPC1## wherein R.degree. is lower alkyl, n is 0, 1 or 2, R is lower alkyl, R' is a radical of the formula ##SPC2## In which Y and Y' are the same or different and represent hydrogen, lower alkyl, lower alkoxy, halo of atomic weight of 19 to 36 or one of Y and Y' is trifluoromethyl while the other is hydrogen, or a radical of the formula ##SPC3## In which Y" is hydrogen, fluorine, chlorine or alkyl of 1 to 3 carbon atoms, Are prepared by cyclizing a compound of formula II ##SPC4## in which R, R', R.degree. and n are as defined above, with phosgene, or, Where R is not a tertiary alkyl group in which the tertiary carbon atom is directly attached to the ring nitrogen atom, with a C.sub.1 -C.sub.2 alkyl chlorocarbonate or 1,1'carbonyldiimidazole. The compounds of formula I possess pharmaceutical activity in animals.
化合物的公式I:其中R.degree.是较低的烷基,n为0、1或2,R为较低的烷基,R'是公式##
SPC2##中的基团,其中Y和Y'相同或不同,代表氢、较低的烷基、较低的烷氧基、原子量为19到36的卤素或Y和Y'中的一个是三
氟甲基,另一个是氢,或者是公式##
SPC3##中的基团,其中Y"是氢、
氟、
氯或1到3个碳原子的烷基,通过将公式II##
SPC4##中的化合物与
光气环化制备而成,其中上述R、R'、R.degree.和n的定义如上所述,或者,当R不是直接连接到环氮原子的三级烷基基团时,使用C.sub.1-C.sub.2烷基
氯碳酸酯或1,1'羰基二
咪唑。 公式I的化合物在动物体内具有药理活性。