Synthesis and pharmacological evaluation of some 2-N-alkyl-and -aralkyl-3,4:6,7-dibenzomorphans.

2-N-Alkyl or 2-aralkyl-5,9-dimethyl-3,4:6,7-dibenzomorphans 3a-c were synthesized by condensing 1-alkyl or aralkyl-3,4-dimethylquinolinium iodides 1a-c with benzyl magnesium chloride followed by subsequent cyclization of 2-benzyl-1-alkyl or aralkyl-3,4-dimethylquinolines 2a-c. Their structures were established through elemental and spectral studies. The preliminary pharmacological screening of 3a-c and other 3,4:6,7-dibenzomorphans [16] on mice showed that these compounds have a depressant action on CNS.