Multi-step reaction with 14 steps
1: 1)lithium diisopropylamide (LDA), 2) HMPA / 1)THF, -78 deg C to -25 deg C, 1.5 h, 2)THF, -25 deg C to 25 deg C, 3.75 h
2: 90 percent / NaIO4 / H2O; methanol / 12 h / 0 - 25 °C
3: t-BuOK/t-BuOH / tetrahydrofuran; 2-methyl-propan-2-ol / 1) 0-5 deg C, 22.5 h, 2) 25 deg C, 23 h
4: 61 percent / K2CO3 / acetone / 72 h / Heating
5: 98 percent / H2 (1 atm) / Pd/C / tetrahydrofuran / 24 h / 25 °C
6: 72 percent / Al(i-OPr)3 / toluene; cyclohexanone / 1.5 h / Heating
7: 1) NaH / 1) THF, 30 min, 0 deg C, 2)10 min, 25 deg C, 3) THF, 0-10 deg C, 2.5 h
8: 75 percent / toluene / 21 h / 140 °C
9: 100 percent / LiAlH4 / tetrahydrofuran / 1.5 h / 0 - 25 °C
10: 100 percent / HBr(g) / benzene / 0.25 h / Ambient temperature
11: 99 percent / acetonitrile / 18 h / 25 °C
12: 1)t-BuOK, 2)H2O/HOAc/THF (1:3:3) / 1) DME, -15 to 0 deg C, 1 h, 2) 25 deg C, 1.5 h, 3) 25 deg C, 16 h
13: n-butyllithium / 1)hexane, THF, 25 deg C, 15 min, 2)THF, 25 deg C, 17 h
14: 84 percent / ethanethiol, methyllithium / hexamethylphosphoric acid triamide / 1) 0 deg C, 2) 25 deg C, 3) 160 deg C, 6 h
With
N,N,N,N,N,N-hexamethylphosphoric triamide; sodium periodate; lithium aluminium tetrahydride; n-butyllithium; potassium tert-butylate; water; hydrogen bromide; methyllithium; hydrogen; aluminum isopropoxide; sodium hydride; potassium carbonate; acetic acid; ethanethiol; tert-butyl alcohol; lithium diisopropyl amide;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; N,N,N,N,N,N-hexamethylphosphoric triamide; water; cyclohexanone; acetone; toluene; acetonitrile; tert-butyl alcohol; benzene;
DOI:10.1021/jo00195a034