F. Guerrera et al., SYNTHESIS OF NOVEL 1-ALKYL OR RYL-2-(4-SUBSTITUTED-1-PIPERAZINYL)-1H-BENZOTHIENO [2,3-D]IMIDAZOLES, Journal of heterocyclic chemistry, 32(2), 1995, pp. 591-594
The synthesis of novel 1-alkyl or ted-1-piperazinyl)-1H-benzothieno[2,
3-d]imidazoles 7e-x starting from 2-nitro-3-bromobenza[b]thiophene is
described. These compounds were prepared as potential H-1-antihistamin
ic agents.