After acylation of 2-aminoindan (I) with propionyl chloride, the resulting propionamide (II) was reduced with borane to the amine (III). Further acylation of (III) with propionyl chloride furnished amide (IV). Nitration of (IV), followed by transfer hydrogenation of nitro derivative (V), gave rise to aniline (VI). Reduction of the amide function of (VI) with borane yielded diamine (VII). Subsequent reaction of aniline (VII) with thiocyanogen, generated from KSCN and Br2, provided the desired benzothiazole along with the regioisomeric analogue (VIII), which were separated by column chromatography.