Multi-step reaction with 11 steps
1: 88 percent / H2 / 5percent Pd/C / acetone / 6.5 h / Ambient temperature
2: 97 percent / pyridine / 12 h / Ambient temperature
3: 62 percent / DBU / toluene / 2 h / Heating
4: 1.) PhSeCl, BF3*Et2O, 2.) MPC / 1.) THF, reflux, 10.5 h 2.) 13 h, RT
5: 96 percent / NaBH4 / methanol; tetrahydrofuran / 0.75 h / Ambient temperature
6: 1.) NaH, imidazole / 1.) THF, reflux, 3h 2.) 30 min
7: 67 percent / 1.) Bu3SnH, α,α-bisisobutyronitrile 2.) HCl / 1.)toluene, reflux, 5h 2.) 50 deg C, 2.5 h
8: 62 percent / CaCl2, 3-ethylpentane-3-thiol / dimethylsulfoxide / 1 h / 140 - 145 °C
9: 13 percent / Bu4NBH4 / methanol / 1.17 h / 0 °C
10: 1.) NaH, imidazole 2.) Bu4NHSO4 / 1.) THF, reflux, 1h 2.) RT, 5h
11: 94 percent / LiAlH4, AlCl3 / tetrahydrofuran / 1 h / Ambient temperature
With
1H-imidazole; hydrogenchloride; sodium tetrahydroborate; lithium aluminium tetrahydride; aluminium trichloride; Phenylselenyl chloride; 2,2'-azobis(isobutyronitrile); 3-ethylpentan-3-yl thiol; boron trifluoride diethyl etherate; hydrogen; tri-n-butyl-tin hydride; tetra(n-butyl)ammonium hydrogensulfate; myristyl-gamma-picolinium chloride; sodium hydride; tetrabutylammonium borohydride; 1,8-diazabicyclo[5.4.0]undec-7-ene; calcium chloride;
palladium on activated charcoal;
In
tetrahydrofuran; pyridine; methanol; dimethyl sulfoxide; acetone; toluene;
DOI:10.1248/cpb.44.500