Technology Process of 1α,3β-bis(methoxymethoxy)-21-norchol-5-en-24-yl bromide
There total 1 articles about 1α,3β-bis(methoxymethoxy)-21-norchol-5-en-24-yl bromide which
guide to synthetic route it.
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synthetic route:
- Guidance literature:
-
Multi-step reaction with 8 steps
1: 1.) t-BuOK, 3.) pyridine, 4-dimethylaminopyridine
2: 66 percent / diethylaluminum chloride / CH2Cl2; hexane / 24 h / Ambient temperature
3: H2 / 5percent Pt/C / ethyl acetate / 1.5 h / Ambient temperature
4: 85percent KOH / methanol / a) reflux, 6 h, b) RT, 14 h
5: iso-Pr2NEt / tetrahydrofuran; dimethylformamide / 14 h / 45 °C
6: LiAlH4 / tetrahydrofuran / 2 h / Ambient temperature
7: pyridine / 14 h / Ambient temperature
8: LiBr / tetrahydrofuran / 20 h / 50 °C
With
pyridine; dmap; potassium hydroxide; lithium aluminium tetrahydride; potassium tert-butylate; hydrogen; diethylaluminium chloride; N-ethyl-N,N-diisopropylamine; lithium bromide;
platinum on activated charcoal;
In
tetrahydrofuran; methanol; hexane; dichloromethane; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.1248/cpb.40.648
- Guidance literature:
-
Multi-step reaction with 7 steps
1: 1.) n-BuLi / 1.) THF, n-hexane, 4 deg C, 2 h, 2.) THF, n-hexane, 4 deg C, 1 h
2: 83 percent / CH3I, H2O / acetone / 20 h / Heating
3: 60 percent / tetrahydrofuran / 0.5 h / Ambient temperature
4: 86 percent / 4-dimethylaminopyridine, pyridine / 49 h / Ambient temperature
5: 1.) NBS, NaHCO3, 2.) γ-collidine
6: 34 percent / LiAlH4 / tetrahydrofuran / 1.5 h / Heating
7: 18 percent / ethanol / 0.08 h / 0 °C / Irradiation
With
pyridine; 2,4,6-trimethyl-pyridine; dmap; N-Bromosuccinimide; lithium aluminium tetrahydride; n-butyllithium; water; sodium hydrogencarbonate; methyl iodide;
In
tetrahydrofuran; ethanol; acetone;
DOI:10.1248/cpb.40.648
- Guidance literature:
-
Multi-step reaction with 5 steps
1: 1.) n-BuLi / 1.) THF, n-hexane, 4 deg C, 2 h, 2.) THF, n-hexane, 4 deg C, 1 h
2: 83 percent / CH3I, H2O / acetone / 20 h / Heating
3: 60 percent / tetrahydrofuran / 0.5 h / Ambient temperature
4: 86 percent / 4-dimethylaminopyridine, pyridine / 49 h / Ambient temperature
5: 1.) NBS, NaHCO3, 2.) γ-collidine
With
pyridine; 2,4,6-trimethyl-pyridine; dmap; N-Bromosuccinimide; n-butyllithium; water; sodium hydrogencarbonate; methyl iodide;
In
tetrahydrofuran; acetone;
DOI:10.1248/cpb.40.648
