Multi-step reaction with 7 steps
1: 1.) NaH / 1.) DMF, 2.) DMF, RT, overnight
2: 67 percent / NaH / dimethylformamide / Ambient temperature
3: 85 percent / SnCl2*2H2O, conc. HCl / methanol / 4.5 h
4: 80 percent / CH3ONa / methanol / 3 h / Heating
5: 1.) potassium hexamethyldisilazide, 2.) trimethylphosphite, O2 / 1.) THF, -78 deg C, 1 h, 2.) THF, 0 deg C, 30 min
6: 46 percent / LiI, H2O / pyridine / 1.5 h / Heating
7: 1.) NaH / 1.) DMF, 1 h, 2.) DMF, toluene, 80 deg C, 3 h
With
hydrogenchloride; water; oxygen; sodium methylate; potassium hexamethylsilazane; sodium hydride; tin(ll) chloride; lithium iodide; phosphorous acid trimethyl ester;
In
pyridine; methanol; N,N-dimethyl-formamide;
DOI:10.1021/jm00082a020