Multi-step reaction with 7 steps
1: 80 percent / SOCl2 / benzene / 10 h / Heating
2: 1.) lithium diisopropylamide / 1.) THF, -78 deg C, 0.5 h, 2.) THF, a) -78 deg C, 4 h, b) 25 deg C, 8 h
3: 1.) CuI / 1.) THF, -20 deg C, 2.) THF, -78 deg C, 1 h
4: 1.) NaH / 1.) ether, 10 min, 2.) ether, 2 h
5: 1.) CuI / 1.) ether, -20 deg C, 2.) ether, 4 h
6: 1.) O3, 2.) Me2S / 1.) MeOH, CH2Cl2, -78 deg C, 2.) MeOH, CH2Cl2, 25 deg C, overnight
7: p-TsOH / benzene / 6 h / Heating
With
copper(l) iodide; thionyl chloride; dimethylsulfide; sodium hydride; toluene-4-sulfonic acid; ozone; lithium diisopropyl amide;
In
benzene;
DOI:10.1021/jo00221a027