1.1R:N2H4-H2O, 2 h, 0°C
1.2R:AcOH, R:NaNO2, S:H2O, 2 h, 0°C
2.1C:p-MeC6H4SO3H, S:DMF, 2 h, 40°C
1.1R:K2CO3, S:DMF
2.1R:EtN(Pr-i)2, C:CuI, S:DMF, 10 min, 40°C
3.1S:C5H5N, 20 min, rt
3.2R:Et3N, S:H2O, 1 h, rt
4.1R:Me3SiN=CMeOSiMe3, S:DMF, 2 h, 50°C
4.2R:SOCl2, 2 h, rt
4.3R:Et3N, 1 h, rt
5.1S:DMF, 1 h, rt
5.2R:MeOH, 30 min, rt
6.1R:2Bu3N •H4P2O7, 20 h, rt
7.1R:NH4OH, S:H2O, 1-2 h, 50°C
7.2R:DOWEX 50W, S:H2O, S:MeOH, 5 h, rt
7.3R:DOWEX 50W

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