Multi-step reaction with 9 steps
1: 97 percent / pyridine / CH2Cl2 / 1 h / 0 °C
2: 66 percent / Et3N, (Ph3P)2PdCl2 / dimethylformamide / 2 h / 90 °C
3: 75 percent / K2CO3 / methanol / 3 h / Ambient temperature
4: 34 percent / Et3N, PdCl2(PPh3)2 / dimethylformamide / 2 h / 110 °C
5: 45 percent / pyridinium chloride / 2 h / 200 °C
6: 1.) NaH / 1.) DMF, RT, 15 min, 2.) DMF, RT, 12 h
7: 90 percent / NaClO2, NaH2PO4, 2-methyl-2-butene / N,N-dimethyl-acetamide; H2O / 2 h / Ambient temperature
8: 1.) diphenylphosphoryl azide, Et3N / 1.) toluene, reflux, 2 h, 2.) toluene, reflux, 8 h
9: 1.) NaH / 1.) DMF, RT, 15 min, 2.) DMF, 60 deg C, 3 h
With
pyridine; bis-triphenylphosphine-palladium(II) chloride; sodium chlorite; sodium dihydrogenphosphate; 2-methyl-but-2-ene; diphenylphosphoranyl azide; pyridine hydrochloride; sodium hydride; potassium carbonate; triethylamine;
In
methanol; dichloromethane; N,N-dimethyl acetamide; water; N,N-dimethyl-formamide;
DOI:10.1248/cpb.47.226