Multi-step reaction with 7 steps
1: 59 percent / PPh3, diethyl azidodicarboxylate / dimethylformamide / a) from 0 deg C to RT, 1 h, b) RT, 30 min
2: 1.) MeMgCO3, CO2 / 1.) DMF, 1.5 h, 2.) DMF, 110 deg C, 3 h
3: hydrazine hydrate / ethanol / 3 h / Heating
4: pyridine / 2 h / 0 °C
5: H2, aq. 2 N HCl / 10percent Pd/C / ethanol; ethyl acetate
6: 1.) aq. HCl, NaNO2, 2.) SnCl2 / 1.) from -5 deg C to 0 deg C, 30 min, 2.) RT, 3 h
7: ethanol; H2O / 2 h / Heating
With
pyridine; hydrogenchloride; carbon dioxide; MeMgCO3; hydrogen; hydrazine hydrate; triphenylphosphine; tin(ll) chloride; sodium nitrite; diethylazodicarboxylate;
palladium on activated charcoal;
In
ethanol; water; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.1021/jm00018a016