Ethyl 3-isocyanatopropanoate → Ethyl 3-(8-carbamoyl-oxoimidazo[5,1-d][1,2,3,5]tetrazin-3(4H)-yl)propanoate

HRID 2098275Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2098275
[N:1]([CH2:4][CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])=[C:2]=[O:3].[N+:11](=[C:13]1[N:17]=[CH:16][N:15]=[C:14]1[C:18]([NH2:20])=[O:19])=[N-:12]>CS(C)=O>[C:18]([C:14]1[N:15]=[CH:16][N:17]2[C:2](=[O:3])[N:1]([CH2:4][CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])[N:12]=[N:11][C:13]=12)(=[O:19])[NH2:20]

Komponenten

4

Edukt 2

HCID 2733373Ethyl 3-isocyanatopropanoateHCID 534265854-Diazo-4H-imidazole-5-carboxamide

Produkt 1

HCID 44128731Ethyl 3-(8-carbamoyl-oxoimidazo[5,1-d][1,2,3,5]tetrazin-3(4H)-yl)propanoate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 679Dimethyl SulfoxideLösungsmittel

Versuchsvorschrift

Ethyl 3-isocyanatopropionate (Alfa Lancaster) (0.504 mL, 3.83 mmol) was added drop wise to a suspension of 5-diazoimidazole-4-carboxamide (0.450 g, 3.65 mmol) in dry dimethylsulfoxide (4.5 mL) at room temperature under nitrogen. The reaction was stirred in the dark at room temperature. After 16 hours, the reaction mixture was poured onto ice (approximately 25 mL) and the resulting precipitate was washed with ethyl acetate (10 mL) and ether (10 mL) to afford the title compound as a pale brown solid. Yield: 770 mg, 2.75 mmol, 75%. LCMS (ES+), m/z 281 (M+H)+ at 1.60 minutes. 1H NMR (400 MHz, d6-DMSO) δ: 8.86 (1H, s), 7.75 (1H, br s), 7.62 (1H, br s), 4.51 (2H, t), 4.07 (2H, q), 2.89 (2H, t), 1.17 (3H, t).

Aufarbeitung

  1. additionthe reaction mixture was poured onto ice (approximately 25 mL)
  2. washthe resulting precipitate was washed with ethyl acetate (10 mL) and ether (10 mL)

Quellen und Nachweise

ORD-Eintrag
ord-2316adc186f7463099a7ace2e4e29165
Quelldatensatz
uspto-grants-2013_05
Patentnummer
US08450479B2

Notizen zur Reaktion

Wird geladen…