Multi-step reaction with 34 steps
1: 81 percent / tetrahydrofuran / -78 - 23 °C
2: 94 percent / N-methylmorpholine-N-oxide, tetra-n-propylammonium perruthenate / CH2Cl2; acetonitrile
3: (R)-B-isopinocampheyl-9-borabicyclo<3.3.1>nonane
4: imidazole
5: aq. AcOH
6: I2, Ph3P, imidazole
7: 1.) t-BuLi / 1.) ether, -78 deg C, 30 min, 2.) ether, from -78 deg C to 0 deg C, 1.5 h
8: 1.) LDA / 1.) hexane, THF, -78 deg C, 5 min, 2.) hexane, THF, from -78 deg C to 0 deg C, 60 min
9: 5 percent aq. HCl / tetrahydrofuran / 1 h / Ambient temperature
10: 1.) sec-BuLi / 1.) cyclohexane, THF, 0 deg C, 30 min, 2.) cyclohexane, from -78 deg C to 0 deg C, 1 h
11: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h / Ambient temperature
12: 1.) Red-Al, 2.) N-iodosuccinimide / 1.) THF, Et2O, RT, 15 h, 2.) THF, Et2O, 0 deg C, 5 min
13: 97 percent / imidazole / dimethylformamide / 8.5 h / Ambient temperature
14: Ph3P, Pd(OAc)2, Ag2CO3 / tetrahydrofuran / 18 h / 65 °C
15: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / Ambient temperature
16: 95 percent / N-methylmorpholine N-oxide, tetra-n-propylammonium perruthenate / CH2Cl2; acetonitrile / 0.5 h / Ambient temperature
17: 1.) LiBr, Ni(acac)2 / 1.) Et2O, 0 deg C, 10 min, 2.) Et2O, RT, 17 h
18: 92 percent / 2-methoxy-1,3-dioxolane, Amberlyst-15 acidic resin / acetonitrile / 12 h / Ambient temperature
19: 99 percent / m-chloroperbenzoic acid, NaHCO3 / CH2Cl2 / 3 h / 0 - 20 °C
20: 90 percent / LiAlH4 / diethyl ether; tetrahydrofuran / 14 h / Ambient temperature
21: 74 percent / 20 percent aq. HCl / tetrahydrofuran / 12 h / 50 °C
22: 92 percent / N,N-diisopropylethylamine / CH2Cl2 / 7 h / Ambient temperature
23: 2.) Et3N / 1.) toluene, THF, 0 deg C, 10 h, 2.) THF, from 0 deg C to RT
24: 1M aq. HCl / tetrahydrofuran / 0.25 h / Ambient temperature
25: 90 percent / LiAlH4 / tetrahydrofuran / 0.5 h / -78 °C
26: 97 percent / pyridine, DMAP / CH2Cl2 / 2 h / 0 °C
27: 1.) LDA / 1.) hexane, THF, 0 deg C, 15 min, 2.) hexane, THF, 0 deg C, 2 h
28: K2CO3, KOH / methanol / 24 h / 140 °C
29: diethyl ether / 0.5 h / 0 °C
30: 88 percent / DMAP, pyridine / 5 h / 100 °C
31: 98 percent / aq. HCl / methanol / 0.75 h / 70 °C
32: 90 percent / pyridinium chlorochromate, 4 Angstroem sives / CH2Cl2 / 2.5 h / Ambient temperature
33: 72 percent / lithium n-propylmercaptide, HMPA / benzene / 8 h / Ambient temperature
34: 90 percent / H2 / 10 percent Pd/C / methanol / 9 h / Ambient temperature
With
2-methoxy-1,3-dioxolane; pyridine; 1H-imidazole; hydrogenchloride; N,N,N,N,N,N-hexamethylphosphoric triamide; dmap; palladium diacetate; bis(acetylacetonate)nickel(II); potassium hydroxide; N-iodo-succinimide; lithium aluminium tetrahydride; tetrapropylammonium perruthennate; B-isopinocampheyl-9-borabicyclo[3.3.1]nonane; 4 Angstroem sives; Amberlyst-15 acidic resin; tetrabutyl ammonium fluoride; hydrogen; iodine; tert.-butyl lithium; sec.-butyllithium; lithium n-propylmercaptide; sodium hydrogencarbonate; potassium carbonate; acetic acid; 4-methylmorpholine N-oxide; triethylamine; N-ethyl-N,N-diisopropylamine; 3-chloro-benzenecarboperoxoic acid; triphenylphosphine; sodium bis(2-methoxyethoxy)aluminium dihydride; silver carbonate; pyridinium chlorochromate; lithium bromide; lithium diisopropyl amide;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane; N,N-dimethyl-formamide; acetonitrile; benzene;
DOI:10.1021/ja990404v