Multi-step reaction with 9 steps
1.1: triethylamine / toluene / 3 h / 125 °C
2.1: 77 percent / oxalyl chloride; DMSO; diisopropylethylamine / CH2Cl2 / -78 - 20 °C
3.1: 45 percent / acetic acid / 2 h / 90 °C
4.1: NH2NH2*H2O / tetrahydrofuran
5.1: 8 percent / TEA / acetonitrile / 20 °C
6.1: H2 / Pd/C / methanol / 8 h / 20 °C
7.1: 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium*BF4; TEA / dimethylformamide / 0.17 h / 20 °C
7.2: 26 percent / dimethylformamide
8.1: H2 / Pd/C / methanol / 8 h / 20 °C
9.1: 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium*BF4; TEA / dimethylformamide / 0.17 h / 20 °C
9.2: 43 percent / dimethylformamide
With
oxalyl dichloride; TEA; hydrogen; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; hydrazine hydrate; acetic acid; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; toluene; acetonitrile;
2.1: Swern oxidation;
DOI:10.1021/jm0499209