Multi-step reaction with 21 steps
1.1: imidazole / CH2Cl2 / 1.42 h / 20 °C
1.2: CH2Cl2; dimethylformamide / 20 °C
2.1: 46.9 g / pyridinium chlorochromate; 4A molecular sieves / CH2Cl2 / 2 h / Heating
3.1: tetrahydrofuran / 0 - 20 °C
4.1: BH3*SMe2 / tetrahydrofuran / -78 - 20 °C
4.2: 31.7 g / pyridinium chlorochromate; 4A molecular sieves / CH2Cl2 / 48 h
5.1: diisobutylaluminum hydride / tetrahydrofuran; toluene / -78 °C
6.1: Dowex 50WX8-200; aq. AcOH / tetrahydrofuran
7.1: TBAF / tetrahydrofuran / 0 - 20 °C
8.1: 1,3-dicyclohexylcarbodiimide; dichloroacetic acid; DMSO / 16 h
9.1: t-BuOK / tetrahydrofuran / 0.5 h
9.2: 240 mg / tetrahydrofuran
10.1: BH3*SMe2 / tetrahydrofuran / 17 h / -78 - 0 °C
10.2: 56 percent / NaBO3*H2O / tetrahydrofuran / 2 h / 0 - 20 °C
11.1: 1,3-dicyclohexylcarbodiimide; dichloroacetic acid; DMSO / 16 h
12.1: t-BuOK / tetrahydrofuran / 0.5 h
12.2: 150 mg / tetrahydrofuran
13.1: BH3*SMe2 / tetrahydrofuran / 17 h / -78 - 0 °C
13.2: 66 percent / NaBO3*H2O / tetrahydrofuran / 2 h / 0 - 20 °C
14.1: NaH / tetrahydrofuran / 0 °C
14.2: 80 percent / Bu4NI / tetrahydrofuran / Heating
15.1: 46 percent / aq. HCl / tetrahydrofuran / 0 - 20 °C
16.1: 89 percent / tetrapropylammonium perruthenate; 4-methylmorpholine N-oxide; 4A molecular sieves / CH2Cl2; acetonitrile / 0 - 20 °C
17.1: LDA / tetrahydrofuran; heptane; ethylbenzene / 2 h / -78 °C
17.2: tetrahydrofuran; heptane; ethylbenzene / -78 °C
18.1: Et3N / CH2Cl2 / 2.5 h / 0 - 20 °C
19.1: 58 mg / DBU / CH2Cl2 / 3 h / 20 °C
20.1: 58 percent / aq. 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / CH2Cl2 / 2.5 h
21.1: 91 percent / pyridine / CH2Cl2 / 0 °C
With
pyridine; 1H-imidazole; hydrogenchloride; dichloro-acetic acid; tetrapropylammonium perruthennate; dimethylsulfide borane complex; 4 A molecular sieve; DOWEX 50WX8-200; potassium tert-butylate; tetrabutyl ammonium fluoride; sodium hydride; diisobutylaluminium hydride; acetic acid; dimethyl sulfoxide; 4-methylmorpholine N-oxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; dicyclohexyl-carbodiimide; pyridinium chlorochromate; 2,3-dicyano-5,6-dichloro-p-benzoquinone; lithium diisopropyl amide;
In
tetrahydrofuran; n-heptane; dichloromethane; ethylbenzene; toluene; acetonitrile;
DOI:10.1021/jm030454h