Scheme 1.
Synthesis of N-9H-alkyltiocarbazoles 5–7a–c. Reagents and conditions: (i) 1, N-dibromoalkane, NaH 60%, DMF, rt; (ii) Thiourea, i-PrOH, reflux, 12 h; NaOH 6 N, reflux, 5 h; HCl 3 N, rt, 10 min.
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