Multi-step reaction with 21 steps
1: 91 percent / aq. HCl / tetrahydrofuran / 2 h / Ambient temperature
2: 100 percent / NaBH4, ZnCl2 / tetrahydrofuran / 1 h / -60 - -15 °C
3: 63 percent / KH, n-Bu4NI / tetrahydrofuran / 1.) room temp., 24 h, 2.) reflux, 3 d
4: 90 percent / I2 / tetrahydrofuran; H2O / 18 h / Ambient temperature
5: 98 percent / DIBAL-H / CH2Cl2 / 1.) -10 deg C, 15 min, 2.) 0 deg C, 15 min
6: 99 percent / 1,5-diazabicyclo<5.4.0>undecene-5 / CH2Cl2 / 1 h / Ambient temperature
7: 94 percent / NaBH4 / methanol / 0.5 h / Ambient temperature
8: Et2NLi / diethyl ether / Heating
9: 95 percent / Et3N, 4-dimethylaminopyridine / CH2Cl2 / 48 h / Ambient temperature
10: 98 percent / SOCl2, pyridine / diethyl ether / 0.05 h / 0 °C
11: 88 percent / tetrahydrofuran / 1.5 h / Ambient temperature
12: 98 percent / Bu4NF / tetrahydrofuran / 18 h / Ambient temperature
13: 94 percent / SO3*pyridine, Et3N, DMSO / CH2Cl2 / 1.) 0 deg C, 1 h, 2.) room temp., 4 h
14: KHMDS / toluene / 1.) 0 deg C, 1 h, 2.) room temp., 2 h
15: aq. HCl / tetrahydrofuran / 18 h
16: 1.) t-BuLi / 1.) Et2O, pentane, -78 deg C, 30 min, 2.) Et2O, pentane, -78 to -20 deg C, 1 h
17: NaHCO3, Dess-Martin reagent / CH2Cl2 / 2 h / Ambient temperature
18: 85 percent / Na2WO4*2H2O, aq. H2O2 / CH2Cl2 / 4 h / Ambient temperature
19: aq. HCl / tetrahydrofuran / 1.5 h / Ambient temperature
20: HONH2*HCl, Et3N / ethanol / 1.5 h / Ambient temperature
21: 77 percent / N-chlorosuccinimide / dimethylformamide / 1.17 h / Ambient temperature
With
pyridine; hydrogenchloride; dmap; sodium tetrahydroborate; sodium tungstate; N-chloro-succinimide; thionyl chloride; pyridine-SO3 complex; hydroxylamine hydrochloride; lithium diethylamide; tetrabutyl ammonium fluoride; dihydrogen peroxide; iodine; tert.-butyl lithium; tetra-(n-butyl)ammonium iodide; potassium hydride; potassium hexamethylsilazane; diisobutylaluminium hydride; sodium hydrogencarbonate; Dess-Martin periodane; dimethyl sulfoxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; zinc(II) chloride;
In
tetrahydrofuran; methanol; diethyl ether; ethanol; dichloromethane; water; N,N-dimethyl-formamide; toluene;
DOI:10.1016/S0040-4020(99)00305-1