Syntheses of new substituted triazino tetrahydroisoquinolines and β-carbolines as novel antileishmanial agents1

A series of triazino tetrahydroisoquinolines (3–5) and β-carboline derivatives (15–27) have been synthesized as novel antileishmanial agents. Among them, compounds 15, 16 and 25 have shown 78.0%, 78.6% and 68.0% in vivo inhibition against Leishmania donovani at a dose of 50 mg kg–1 × 5 days, respectively, while compounds 3 and 18 exhibited 55.6% and 53.3% in vivo inhibitions, respectively, against L. donovani at a dose of 50 mg kg–1 × 5 days.

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