Multi-step reaction with 11 steps
1: MeNHNH2 / dimethylformamide / 80 °C
2: Et3N / CH2Cl2
3: 77 percent / K2S2O8, NaH2PO4, H2O / acetonitrile / 78 °C
4: 60 percent / Et3N, DMAP / CH2Cl2
5: Na2CO3, H2O / tetrahydrofuran
6: diethyl ether
7: 96 percent / H2 / Pd/C / dimethylformamide
8: 80 percent / O-(7-azobenzotriazol-1-yl-)-N,N,N',N'-tetramethyluronium hexafluorophosphate, 1-hydroxy-7-azobenzotriazole, (i-Pr2)NEt / CH2Cl2
9: 100 percent / H2 / Pd/C / dimethylformamide
10: 89 percent / TFA / CH2Cl2
11: 60 percent / (i-Pr)2NEt / CH2Cl2
With
dmap; sodium dihydrogenphosphate; dipotassium peroxodisulfate; 1-hydroxy-7-aza-benzotriazole; water; hydrogen; sodium carbonate; triethylamine; N-ethyl-N,N-diisopropylamine; methylhydrazine; HATU; trifluoroacetic acid;
palladium on activated charcoal;
In
tetrahydrofuran; diethyl ether; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1039/a804412k