1.1R:N2H4-H2O, S:H2O, 0°C; 2 h, 0°C
2.1R:AcOH, R:NaNO2, S:H2O, 0°C; 2 h, 0°C
3.1R:p-MeC6H4SO3H, S:DMF, 2 h, 40°C
1.1R:K2CO3, S:DMF, 30 min, rt
1.2S:PhMe, 12 h, rt
2.1R:EtN(Pr-i)2, C:CuI, S:DMF, 10 min, 40°C
3.1R:R:C5H5N, 20 min, rt
3.2R:Et3N, S:H2O, 1 h, rt
4.1S:DMF, 2 h, 50°C; 50°C → rt
5.1R:S:DMF, 2 h, rt
6.1R:Et3N, S:H2O, 1 h, rt
7.1R:C5H5N, S:DMF, 1 h, rt
7.2R:MeOH, 30 min, rt
8.1R:20 h, rt
9.1R:NH4OH, S:H2O, 1-2 h, 50°C
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