Multi-step reaction with 12 steps
1: 83 percent / tetrahydrofuran / 12 h / 20 °C
2: 83 percent / 1,4-bis(methylamino)pyridine, DCC / CH2Cl2 / 18 h / 20 °C
3: 79 percent / NaH / tetrahydrofuran / 4 h / 20 °C
4: 79 percent / LiBr, H2O / dimethylformamide / 12 h / Heating
5: p-TsOH / toluene / 12 h / Heating
6: 1.) hydroquinone, 2.) 20percent AcOH / 1.) THF, 60 deg C, 2 d,2.) H2O, THF, 40 deg C, 72 h
7: 76 percent / LiOH, 30percent H2O2 / methanol / 5 h / 20 °C
8: 1.) NH2NH2*H2O, 2.) KOH, 3.) conc. HCl / 1.) diethylene glycol, 160 deg C, 1 h, 2.) 220-225 deg C, 4 h, 3.) H2O, 0 deg C, 4.) Et2O, 0 deg C
9: 1.) POCl3, 2.) 1M LiClO4, 3.) H2, 4.) 30percent ammonia / 3.) 10percent Pd/C / 1.) CH3CN, 100 deg C, 4 h, 2.) CH2Cl2, 10 min, 3.) DMF, 1 bar, 5 h
10: 70 percent / sodium bis(trimethylsilyl)amide / toluene; tetrahydrofuran / 2 h / 20 °C
11: 65 percent / tert-butyl nitrite, sodium bis(trimethylsilyl)amide / toluene; tetrahydrofuran / 1.5 h / 50 °C
12: p-TsOH, paraformaldehyde / acetic acid / 5 h / 100 - 105 °C
With
hydrogenchloride; potassium hydroxide; lithium hydroxide; ammonium hydroxide; formaldehyd; tert.-butylnitrite; 1,4-bis(methylamino)pyridine; water; hydrogen; dihydrogen peroxide; lithium perchlorate; sodium hexamethyldisilazane; sodium hydride; toluene-4-sulfonic acid; hydrazine hydrate; acetic acid; hydroquinone; dicyclohexyl-carbodiimide; lithium bromide; trichlorophosphate;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; dichloromethane; acetic acid; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jo9622690