Multi-step reaction with 7 steps
1: 94 percent / K2CO3, CuO, pyridine / 21 h / 120 °C
2: 80 percent / H5IO6, I2, aq. H2SO4 / acetic acid / 2 h / 90 °C
3: 99 percent / DIBAL-H / diethyl ether; cyclohexane / 7 h / -78 °C
4: 94 percent / KN(TMS)2, 18-crown-6 / tetrahydrofuran; toluene / 1.) -78 deg C, 10 min, 2.) -78 deg C, 10 h
5: 94 percent / DBU / tetrahydrofuran / 30 h / Heating
6: 99 percent / DIBAL-H / diethyl ether; cyclohexane / 1.) -78 deg, 2 h, 2.) ice-bath cooling, 30 min
7: 79 percent / Pd(OAc)2 / various solvent(s) / 1.) r.t., 30 min, 2.) 25 deg C, 40 h
With
pyridine; palladium diacetate; 18-crown-6 ether; sulfuric acid; iodine; potassium hexamethylsilazane; diisobutylaluminium hydride; potassium carbonate; 1,8-diazabicyclo[5.4.0]undec-7-ene; periodic acid; copper(II) oxide;
In
tetrahydrofuran; diethyl ether; cyclohexane; acetic acid; toluene;
DOI:10.1021/jo00097a052