Multi-step reaction with 15 steps
1.1: tetrahydrofuran / 1.5 h / Heating
2.1: H2O
3.1: 1.178 g / Cs2CO3; AsPh3 / PdCl2(dppf)2*CH2Cl2 / tetrahydrofuran / 24 h / 20 °C
4.1: chemical manganese dioxide / CH2Cl2 / 4 h / 20 °C
5.1: dibutylboryl triflate; Et3N / CH2Cl2 / 0 - 3 °C
5.2: 5.609 g / CH2Cl2 / 1 h / -78 - -5 °C
6.1: 88 percent / CH2Cl2; methanol / 0.17 h / -30 °C
7.1: Et3N; DMAP / CH2Cl2 / 2.75 h / 0 - 20 °C
8.1: 1.04 g / DIBAL / CH2Cl2; hexane / 0.5 h / -78 - 0 °C
9.1: N-methylmorpholine N-oxide; tetrapropylammonium perruthenate; MS4A / acetonitrile / 0.42 h / 0 - 20 °C
10.1: KHMDS; 18-crown-6 / tetrahydrofuran; toluene / -78 °C
10.2: 907 mg / tetrahydrofuran; toluene / 0.67 h / -78 - -10 °C
11.1: 76 percent / TFA / CH2Cl2 / 22.5 h / -10 - 20 °C
12.1: 68 percent / HMPA / tetrahydrofuran; hexane / 0.5 h / -78 °C
13.1: LiOH; H2O / tetrahydrofuran / 1.5 h / 0 °C
14.1: KHCO3 / dimethylformamide / 3 h / 20 °C
15.1: 86 mg / EDCI*HCl; DMAP / CH2Cl2 / 13 h / 20 °C
With
N,N,N,N,N,N-hexamethylphosphoric triamide; dmap; manganese(IV) oxide; lithium hydroxide; tetrapropylammonium perruthennate; 18-crown-6 ether; triphenyl-arsane; di-n-butylboryl trifluoromethanesulfonate; water; potassium hexamethylsilazane; diisobutylaluminium hydride; potassium hydrogencarbonate; caesium carbonate; 4-methylmorpholine N-oxide; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; trifluoroacetic acid;
dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2;
In
tetrahydrofuran; methanol; hexane; dichloromethane; N,N-dimethyl-formamide; toluene; acetonitrile;
1.1: Addition / 2.1: Hydrolysis / 3.1: Substitution / 4.1: Oxidation / 5.1: enolisation, boration / 5.2: Addition / 6.1: Substitution / 7.1: Substitution / 8.1: Reduction / 9.1: Oxidation / 10.1: deprotonation, Still-Horner olefination / 10.2: Condensation / 11.1: ether cleavage, lactonization / 12.1: Addition / 13.1: Hydrolysis / 14.1: Esterification / 15.1: Esterification;
DOI:10.1016/S0040-4020(00)00081-8