申请人:Gruppo Lepetit S.p.A.
公开号:US03985811A1
公开(公告)日:1976-10-12
Pharmacologically active diphenylmethane derivatives of formula (I) ##SPC1## wherein: R is halo, nitro or lower alkoxy; R.sub.1 is hydrogen, halo, nitro, lower alkyl or lower alkoxy; R.sub.2 is hydrogen, lower acyl, carbamyl or substituted carbamyl; X is an --OR.sub.3 or --NHR.sub.4 group wherein R.sub.3 is hydrogen, lower alkyl, phenyl, substituted phenyl, phenyl-lower alkyl, acyl, carbamyl or substituted carbamyl; R.sub.4 is hydrogen, lower alkyl or lower acyl; and x and y are integers from zero to two, provided that the sum of x and y is at least one. The compounds are prepared by hydrogenation of an o-benzoylbenzoic acid of formula (II) to the corresponding diol of formula (III) according to the following scheme: ##SPC2## Wherein R, R.sub.1, x and y have the same meaning given above and Z is O or H.sub.2. As hydrogenating agents, a hydride or mixed metal hydrides are used. The diols of formula (III) may be subsequently coverted to other inventive compounds of formula (I) by simple chemical operations. The compounds have CNS depressant activity.
公式(I)的药理活性二苯甲烷衍生物##SPC1##其中:R为卤素,硝基或较低的烷氧基;R.sub.1为氢,卤素,硝基,较低的烷基或较低的烷氧基;R.sub.2为氢,较低的酰基,氨基甲酰基或取代的氨基甲酰基;X为--OR.sub.3或--NHR.sub.4基团,其中R.sub.3为氢,较低的烷基,苯基,取代的苯基,苯基-较低的烷基,酰基,氨基甲酰基或取代的氨基甲酰基;R.sub.4为氢,较低的烷基或较低的酰基;x和y为从零到二的整数,前提是x和y的总和至少为一。该化合物通过将公式(II)的o-苯甲酰基苯甲酸氢化为相应的二醇(III)来制备,如下图所示:##SPC2##其中R,R.sub.1,x和y的含义与上述相同,Z为O或H.sub.2。作为氢化剂,使用氢化物或混合金属氢化物。公式(III)的二醇可以通过简单的化学操作随后转化为公式(I)的其他创新化合物。这些化合物具有中枢神经系统抑制活性。