Multi-step reaction with 7 steps
1: 2N NaOH / H2O / 18 h
2: 370 mg / NIS, TfOH, MS 4 Angstroem / 1,2-dichloro-ethane; diethyl ether / 0.5 h / 20 °C
3: 304 mg / t-BuOK / methanol / 1 h
4: 575 mg / NIS, TfOH, MS 4 Angstroem / 1,2-dichloro-ethane; diethyl ether / 0.25 h / -30 °C
5: 93 percent / t-BuOK / methanol / 4 h
6: 1) MS 4 Angstroem, 2) NIS, TfOH / 1) 1,2-dichloroethane, Et2O, -30 deg C, 30 min, 2) 1,2-dichloroethane, Et2O, 90 min
7: 63 mg / HDTC / acetic acid; various solvent(s) / 20 h
With
sodium hydroxide; N-iodo-succinimide; trifluorormethanesulfonic acid; MS 4 Angstroem; potassium tert-butylate;
In
methanol; diethyl ether; water; acetic acid; 1,2-dichloro-ethane;
DOI:10.1016/S0040-4020(01)89043-8