Oxalic Acid → (+/-)-1-[3-[[(3,4-Dihydro-2h-1-benzopyran-2-yl)-methyl]amino]propyl]tetrahydro-2(1h)-pyrimidinethione ethanedioate

HRID 23333Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 23333
[O:1]1[C:6]2[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=2[CH2:4][CH2:3][CH:2]1[CH:11]=O.[NH2:13][CH2:14][CH2:15][CH2:16][N:17]1[CH2:22][CH2:21][CH2:20][NH:19][C:18]1=[S:23].[C:24]([OH:29])(=[O:28])[C:25]([OH:27])=[O:26]>CO.[Pd]>[C:24]([OH:29])(=[O:28])[C:25]([OH:27])=[O:26].[O:1]1[C:6]2[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=2[CH2:4][CH2:3][CH:2]1[CH2:11][NH:13][CH2:14][CH2:15][CH2:16][N:17]1[CH2:22][CH2:21][CH2:20][NH:19][C:18]1=[S:23]

Komponenten

6

Edukt 3

HCID 971Oxalic Acid2×HCID 20627851HCID 20627851, VerbindungHCID 225732481-(3-aminopropyl)tetrahydro-2(1H)-pyrimidinethione

Produkt 1

HCID 22573245(+/-)-1-[3-[[(3,4-Dihydro-2h-1-benzopyran-2-yl)-methyl]amino]propyl]tetrahydro-2(1h)-pyrimidinethione ethanedioateAusbeute 7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 887MethanolLösungsmittel

Versuchsvorschrift

A mixture of 3,4-dihydro-2H-1-benzopyran-2-carboxaldehyde (0.015 mol) and 1-(3-aminopropyl)tetrahydro-2(1H)-pyrimidinethione (0.01 mol) in methanol (150 ml) was hydrogenated for 2 days at room temperature (atmospheric pressure) with palladium on activated carbon (2 g) as a catalyst. After uptake of H2 (1 eq.), the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography over silica gel (eluent: CH2Cl2/(CH3OH/NH3) 95/5). The pure fractions were collected and the solvent was evaporated. The residue (0.3 g) was dissolved in ethanol (30 ml) and converted into the ethanedioic acid salt (1:1) with ethanedioic acid (0.3 g; 0.0124 mol). The precipitate was filtered off and dried (vacuum), yielding 0.3 g (7%) of (±)-1-[3-[[(3,4-dihydro-2H-1-benzopyran-2-yl)methyl]amino]propyl]tetrahydro-2(1H)-pyrimidinethione ethanedioate(1:1); mp. 217.6° C. (comp. 14).

Aufarbeitung

  1. filtrationAfter uptake of H2 (1 eq.), the catalyst was filtered off
  2. customthe filtrate was evaporated
  3. customThe residue was purified by column chromatography over silica gel (eluent: CH2Cl2/(CH3OH/NH3) 95/5)
  4. customThe pure fractions were collected
  5. customthe solvent was evaporated
  6. dissolutionThe residue (0.3 g) was dissolved in ethanol (30 ml)
  7. filtrationThe precipitate was filtered off
  8. customdried (vacuum)

Quellen und Nachweise

ORD-Eintrag
ord-c3402315e4fc4880929d664c83ca3266
Quelldatensatz
uspto-grants-2005_02
Patentnummer
US06852714B2

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