Sodium cyanoborohydride → 4-(3-Chlorophenyl)-1,2-dihydroimidazo[1,5-a]pyrimidine-8-carboxamide

HRID 477459Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 477459
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:13]3[CH:14]=[N:15][C:16]([C:17]([NH2:19])=[O:18])=[C:12]3[N:11]=[CH:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1.C([BH3-])#N.[Na+]>C(O)(=O)C.ClCCl>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:13]3[CH:14]=[N:15][C:16]([C:17]([NH2:19])=[O:18])=[C:12]3[NH:11][CH2:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1

Komponenten

5

Edukt 2

HCID 5003444Sodium cyanoborohydrideHCID 146774724-(3-Chlorophenyl)imidazo[1,5-a]pyrimidine-8-carboxamide

Produkt 1

HCID 146774854-(3-Chlorophenyl)-1,2-dihydroimidazo[1,5-a]pyrimidine-8-carboxamideAusbeute 59,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 176Acetic AcidLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a solution of 5.39 g of 4-(m-chlorophenyl)-imidazo[1,5-a]pyrimidine-8-carboxamide (Example 14) in 100 ml of glacial acetic acid, was added in portions 2.8 g of sodium cyanoborohydride at room temperature under nitrogen. The mixture stirred at room temperature for 2 hours. The solvent was evaporated in vacuo to give an oil, and this was dissolved in dichloromethane, then washed with saturated sodium bicarbonate solution, The organic layer was separated, dried over anhydrous sodium sulfate and filtered through a short column of hydrous magnesium silicate. Evaporation of the solvent gave a yellow solid which was recrystallized from acetonitrile to give 3.25 g of the desired product as a yellow solid, mp 182°-184° C.

Aufarbeitung

  1. customThe solvent was evaporated in vacuo
  2. customto give an oil
  3. washwashed with saturated sodium bicarbonate solution
  4. customThe organic layer was separated
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered through a short column of hydrous magnesium silicate
  7. customEvaporation of the solvent
  8. customgave a yellow solid which
  9. customwas recrystallized from acetonitrile

Quellen und Nachweise

ORD-Eintrag
ord-9fba55575c6545e9bdcfd1d9796ce859
Quelldatensatz
uspto-grants-1989_12
Patentnummer
US04888345

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