Multi-step reaction with 14 steps
1.1: 83 percent / LiBH4 / ethanol; diethyl ether; tetrahydrofuran / 0.33 h / 0 °C
2.1: 24 mg / triphenylphosphine; diisopropyl azodicarboxylate / tetrahydrofuran / 6 h / Heating
3.1: 81 percent / pyridine; AcOH; NaH2PO3*H2O / Raney nickel / H2O / 6 h / 50 °C
4.1: tetrahydrofuran / 0.5 h / 0 °C
5.1: triphenylphosphine; diisopropyl azodicarboxylate / diethyl ether / 10 h / 20 °C
6.1: 7.8 mg / potassium carbonate / ethanol / 5 h / 20 °C
7.1: 98 percent / Et3N / CH2Cl2 / 3 h / 20 °C
8.1: 95 percent / aq. lithium hydroxide / tetrahydrofuran; methanol / 6 h / 20 °C
9.1: 80 percent / DCC; HOBt / 24 h / 0 - 20 °C
10.1: 96 percent / aq. lithium hydroxide / tetrahydrofuran; methanol / 2 h / 20 °C
11.1: 2,6-lutidine / CH2Cl2 / 1 h / 20 °C
12.1: 80 percent / aq. potassium carbonate / tetrahydrofuran; methanol / 0.5 h / 20 °C
13.1: DIPEA; 2,4,6-trichlorobenzoyl chloride / tetrahydrofuran / 2.5 h / 20 °C
13.2: 82 percent / DMAP / benzene / 8 h
14.1: 90 percent / TBAF / tetrahydrofuran / 0.17 h / 0 °C
With
pyridine; 2,6-dimethylpyridine; lithium hydroxide; lithium borohydride; sodium dihydrogen phosphate; di-isopropyl azodicarboxylate; 2,4,6-trichlorobenzoyl chloride; tetrabutyl ammonium fluoride; potassium carbonate; benzotriazol-1-ol; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; dicyclohexyl-carbodiimide; triphenylphosphine;
nickel;
In
tetrahydrofuran; methanol; diethyl ether; ethanol; dichloromethane; water;
2.1: Mitsunobu reaction / 5.1: Mitsunobu reaction;
DOI:10.1021/ol070855h