Formaldehyde → (+/-)-cis-N1-Benzyl-N2-tert-butoxycarbonyl-N1-methyl-1,2-cyclohexanediamine

HRID 459475Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 459475
[CH2:1]([NH:8][C@@H:9]1[CH2:14][CH2:13][CH2:12][CH2:11][C@@H:10]1[NH:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C=O.[C:25]([BH3-])#N.[Na+].C(=O)([O-])O.[Na+]>CO>[CH2:1]([N:8]([CH3:25])[C@@H:9]1[CH2:14][CH2:13][CH2:12][CH2:11][C@@H:10]1[NH:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

6

Edukt 4

HCID 712FormaldehydeHCID 516892Sodium BicarbonateHCID 5003444Sodium cyanoborohydrideHCID 58822072(+/-)-cis-N1-Benzyl-N 2-tert-butoxycarbonyl-1,2-cyclohexanediamine

Produkt 1

HCID 58822120(+/-)-cis-N1-Benzyl-N2-tert-butoxycarbonyl-N1-methyl-1,2-cyclohexanediamineAusbeute 58,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

(±)-cis-N1-Benzyl-N2-tert-butoxycarbonyl-1,2-cyclohexanediamine (3.24 g) was dissolved in methanol (30 ml), and to the solution an aqueous solution (35%, 0.909 ml) of formaldehyde was added, and the mixture was stirred at room temperature for 10 minutes. Sodium cyanoborohydride (666 mg) was added to this mixture, and the resultant mixture was stirred at room temperature for 6 hours. Thereafter, a saturated aqueous solution of sodium hydrogencarbonate was added, and the solvent was concentrated under reduced pressure. Dichloromethane was added to the residue to separate an organic layer. The organic layer was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by flash column chromatography on silica gel (hexane:ethyl acetate=3:1) to obtain the title compound (1.98 g) as a yellow oil.

Aufarbeitung

  1. concentrationthe solvent was concentrated under reduced pressure
  2. additionDichloromethane was added to the residue
  3. customto separate an organic layer
  4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  5. distillationthe solvent was distilled off under reduced pressure
  6. customThe residue was purified by flash column chromatography on silica gel (hexane:ethyl acetate=3:1)

Quellen und Nachweise

ORD-Eintrag
ord-a74fbfba57f64c13874ae653636ac3f4
Quelldatensatz
uspto-grants-2007_03
Patentnummer
US07192968B2

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