Multi-step reaction with 8 steps
1: 39 percent / potassium peroxomonosulfate, KHSO3 / CH2Cl2; acetone; H2O / 2 h / 0 °C / KH2PO4 and Na2HPO4 buffer, pH 7.5
2: 67 percent / TsOH*H2O / H2O / 2 h
3: CBr4, PPh3 / CH2Cl2 / 1 h / 0 °C
4: benzene / 2.5 h / Heating
5: t-BuOK / tetrahydrofuran / 1.5 h
6: 99 percent / TsOH*H2O / methanol; H2O / 5 h / 20 °C
7: 94 percent / NaIO4 / acetone; H2O / 2 h / 20 °C
8: 1.) <(4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-bis(diphenylmethoxy)>cyclopentadienyl-chlorotitanium / 1.) THF, 0 deg C, 1 h, 2.) THF, -78 deg C, 1.5 h
With
potassium bisulfite; sodium periodate; oxone; carbon tetrabromide; ((4S,5S)-2,2-dimethyl-1,3-dioxolane-4,5-bis(diphenylmethoxy))cyclopentadienyl-chlorotitanium; potassium tert-butylate; toluene-4-sulfonic acid; triphenylphosphine;
In
tetrahydrofuran; methanol; dichloromethane; water; acetone; benzene;
DOI:10.1016/0040-4020(96)00899-X