Multi-step reaction with 9 steps
1.1: 80.1 percent / (i-Pr)2NEt / CH2Cl2 / 10 h / 20 °C
2.1: NaOEt / ethanol / 2.5 h / 0 - 20 °C
2.2: H2O / acetonitrile / 2 h / Heating
3.1: 448 mg / Et3N / CH2Cl2 / 12 h / 20 °C
4.1: (Me3Sn)2; LiCl / PdCl2[P(o-tolyl)3]2 / tetrahydrofuran / 0.33 h / 50 °C
4.2: 154 mg / iodine / CH2Cl2 / 12 h / 20 °C
5.1: TBAF / tetrahydrofuran / 1 h / 0 °C
6.1: 64.8 mg / pyridine / 12 h / 20 °C
7.1: Zn / tetrahydrofuran / 2 h / 20 °C
7.2: LiCl; CuCN / tetrahydrofuran / -78 - 0 °C
7.3: 95.5 percent / tetrahydrofuran / -78 - 0 °C
8.1: 80.8 percent / Ti(i-PrO)4 / ethanol / 1 h / Heating
9.1: 83.1 percent / pyridine; tributylphosphine / 1.5 h / 20 °C
With
pyridine; titanium(IV) isopropylate; tributylphosphine; tetrabutyl ammonium fluoride; sodium ethanolate; hexamethyldistannane; triethylamine; N-ethyl-N,N-diisopropylamine; lithium chloride; zinc;
dichlorobis(tri-O-tolylphosphine)palladium;
In
tetrahydrofuran; ethanol; dichloromethane;
DOI:10.1021/jo0606002