1.1R:NaBH3CN, S:MeOH, 2 d, 80°C
1.2R:HCl, S:H2O
1.3R:NaHCO3, S:H2O, neutralized
2.1R:H2, C:Pd, S:MeOH, 40°C, 1 bar
3.1R:H3BO3, S:H2O, 12 h, 105°C
3.2S:C5H5N, 6 h, rt
4.1R:NH3, S:MeOH, overnight, rt
5.1R:R:MgCl2, S:H2O, overnight, 37°C, pH 7.5

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