tert-Butyl N-[3-(cyanomethyl)benzyl]-N-methylcarbamate → tert-Butyl N-[3-(2-aminoethyl)benzyl]-N-methylcarbamate

HRID 2228729Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2228729
[C:1]([O:5][C:6](=[O:19])[N:7]([CH2:9][C:10]1[CH:15]=[CH:14][CH:13]=[C:12]([CH2:16][C:17]#[N:18])[CH:11]=1)[CH3:8])([CH3:4])([CH3:3])[CH3:2]>C(O)C.N.[Ni]>[NH2:18][CH2:17][CH2:16][C:12]1[CH:11]=[C:10]([CH:15]=[CH:14][CH:13]=1)[CH2:9][N:7]([CH3:8])[C:6](=[O:19])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4]

Komponenten

5

Edukt 1

HCID 18470858tert-Butyl N-[3-(cyanomethyl)benzyl]-N-methylcarbamate

Produkt 1

HCID 18470795tert-Butyl N-[3-(2-aminoethyl)benzyl]-N-methylcarbamateAusbeute 78 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 935NickelKatalysatorHCID 222AmmoniaLösungsmittelHCID 702EthanolLösungsmittel

Versuchsvorschrift

tert-Butyl-N-[3-(cyanomethyl)benzyl]-N-methylcarbamate (preparation 14) (3 g, 11.5 mmol, slightly impure) was dissolved in ethanol saturated with NH3 (300 ml), a treated with Raney® Nickel (500 mg) and stirred under a hydrogen atmosphere (60 psi, room temperature, 18 hr). The catalyst was removed by filtration under nitrogen, the solvent evaporated to dryness and the resultant crude product purified by chromatography (SiO2, gradient elution with 100% CH2Cl2; 95:5 CH2Cl2:MeOH; 90:10 CH2Cl2:MeOH) to give the desired product (2.40 g, 78%). 1H NMR (CDCl3) δ 1.20 (s, 2H), 1.50 (s, 9H), 2.70-2.90 (m, 5H), 3.00 (s, 2H), 4.20 (s, br, 2H), 7.05 (s, br, 3H), 7.25 (s, br, 1H). LRMS m/z=265.1 (M+1)+.

Aufarbeitung

  1. customThe catalyst was removed by filtration under nitrogen
  2. customthe solvent evaporated to dryness
  3. customthe resultant crude product purified by chromatography (SiO2, gradient elution with 100% CH2Cl2; 95:5 CH2Cl2:MeOH; 90:10 CH2Cl2:MeOH)

Quellen und Nachweise

ORD-Eintrag
ord-1847b5f14222421e9f368c77f58a1d3b
Quelldatensatz
uspto-grants-2002_07
Patentnummer
US06417203B1

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