Multi-step reaction with 6 steps
1: 24 h / Ambient temperature
2: aq. sodium sulfite, aq. KOH / CH2Cl2
3: 99 percent / ethyldiisopropylamine / CH2Cl2 / 12 h / Ambient temperature
4: 1.) O3, 2.) Me2S / 1.) CH2Cl2, -78 deg C, 2.) CH2Cl2, reflux, 12 h
5: 1.) KO-t-Bu / 1.) THF, t-BuOH, 0 deg C, 20 min, 2.) THF, t-BuOH, -3 deg C to 0 deg C, 18 h
6: 81 percent / MeSO2Cl, Et3N / CH2Cl2 / 1.) -78 deg C, 5 min, 2.) 0 deg C, 20 min
With
potassium hydroxide; dimethylsulfide; potassium tert-butylate; ozone; methanesulfonyl chloride; triethylamine; N-ethyl-N,N-diisopropylamine; sodium sulfite;
In
dichloromethane;
DOI:10.1021/jo00230a008