Multi-step reaction with 35 steps
1: 1.) N-BuLi / 1.) n-hexane, THF, -78 deg C, 1 h, 2.) n-hexane, THF, from -78 deg C, 30 min to RT, 1 h
2: 90 percent / H2, quinoline / 5percent Pd/BaSO4 / ethyl acetate / 0.25 h
3: 98 percent / 1N aq. HCl / methanol / 2 h / Ambient temperature
4: 96 percent / imidazole / CH2Cl2 / 1 h / Ambient temperature
5: 95 percent / TsOH*H2O / benzene / 17 h / Ambient temperature
6: 1.) DIBAH, 2.) dl-CSA / 1.) n-hexane, toluene, -78 deg C, 1 h, 2.) RT, 30 min
7: 97 percent / DDQ, phosphate buffer / methanol / 1 h / Ambient temperature
8: 74 percent / MCPBA, 4,4'-thiobis(6-tert-butyl-m-cresol) / CH2Cl2 / 40 h / Heating
9: 1.) Et2O, THF, 0 deg C, 1 h, 2.) Et2O, THF, RT, 3 d
10: 99 percent / Et3N, DMAP / CH2Cl2 / 0.5 h / Ambient temperature
11: 100 percent / TBAF, AcOH / tetrahydrofuran / 5 h / Ambient temperature
12: 96 percent / i-Pr2NEt / CH2Cl2 / 10 h / Ambient temperature
13: 97 percent / K2CO3 / methanol / 0.67 h / Ambient temperature
14: 93 percent / 2,6-di-tert-butylpyridine / CH2Cl2 / 1 h / Ambient temperature
15: 87 percent / H2 / 10percent Pd(OH)2/C / ethyl acetate / 7 h / 760 Torr / Ambient temperature
16: 1.) DMSO, (COCl)2, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 20 min, 2.) CH2Cl2, -40 deg C, 40 min
17: 1.) t-BuOK / 1.) THF, -20 deg C, 30 min, 2.) THF, RT, 40 min
18: 1.) disiamylborane, 2.) 15percent aq. NaOH, 30percent aq. H2O2 / 1.) THF, 0 deg C, 7 h, 2.) THF, RT, 10 h
19: 1.) DMSO, (COCl)2, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 20 min, 2.) CH2Cl2, a) -78 deg C, 30 min, b) -40 deg C, 30 min
20: 1.) t-BuOK / 1.) THF, 0 deg C, 30 min, 2.) THF, 0 deg C, 20 min
21: 97 percent / DIBAH / tetrahydrofuran; CH2Cl2 / 4.5 h / -78 °C
22: 91 percent / D-(-)-diethyl tartrate, (i-PrO)4Ti, t-butylhydroperoxide, MS 4 Angstroem / CH2Cl2; 2,2,4-trimethyl-pentane / 24 h
23: 98 percent / Et3N, DMAP / CH2Cl2 / 1 h / Ambient temperature
24: 97 percent / NaI, NaHCO3 / butan-2-one / 12 h / 60 °C
25: 94 percent / t-BuLi / toluene; diethyl ether / 1 h / -78 °C
26: 91 percent / Et3N, DMAP / CH2Cl2 / 1 h / Ambient temperature
27: OsO4, N-methylmorpholine N-oxide hydrate, H2O / 2-methyl-propan-2-ol; acetone / 4 h / Ambient temperature
28: aq. NaIO4 / tetrahydrofuran / 12 h / Ambient temperature
29: NaBH4 / tetrahydrofuran / 1 h / Ambient temperature
30: Et3N, DMAP / CH2Cl2 / Ambient temperature
31: 85 percent / BF3*Et2O, allyltriemthylsilane / acetonitrile / 0.25 h / Ambient temperature
32: 80 percent / BF3*Et2O, TMSOTf / acetonitrile / 3 h / 0 °C
33: Et3N / CH2Cl2 / 0.5 h / Ambient temperature
34: K2CO3 / methanol / 0.5 h / Ambient temperature
35: CSA / benzene / 2 h / Ambient temperature
With
1H-imidazole; quinoline; titanium(IV) isopropylate; hydrogenchloride; tert.-butylhydroperoxide; dmap; sodium hydroxide; sodium tetrahydroborate; sodium periodate; osmium(VIII) oxide; Santonox R; n-butyllithium; 2,6-di-tert-butyl-pyridine; phosphate buffer; oxalyl dichloride; diethyl (2S,3S)-tartrate; trimethylsilyl trifluoromethanesulfonate; DL-10-camphorsulfonic acid; MS 4 Angstroem; camphor-10-sulfonic acid; boron trifluoride diethyl etherate; potassium tert-butylate; tetrabutyl ammonium fluoride; water; hydrogen; dihydrogen peroxide; tert.-butyl lithium; bis-(1,2-dimethylpropyl)borane; diisobutylaluminium hydride; sodium hydrogencarbonate; potassium carbonate; toluene-4-sulfonic acid; acetic acid; dimethyl sulfoxide; 4-methylmorpholine N-oxide; triethylamine; N-ethyl-N,N-diisopropylamine; 3-chloro-benzenecarboperoxoic acid; 2,3-dicyano-5,6-dichloro-p-benzoquinone; sodium iodide; allyl-trimethyl-silane;
palladium dihydroxide; Pd-BaSO4;
In
tetrahydrofuran; methanol; 2,2,4-trimethylpentane; diethyl ether; dichloromethane; ethyl acetate; acetone; toluene; acetonitrile; butanone; tert-butyl alcohol; benzene;
DOI:10.1248/cpb.45.1558