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Reagents and conditions: (a) BnOH, NaH, room temperature, 30 min. (b) BnOH, K2CO3, 70 °C, overnight. (c) Pd(OH)2, cyclohexene, MeOH, H2O, 80 °C, overnight. (d) R–NH2 (R = H, Bu, Pr), EtOH, room temperature.
