Triethylamine → 6-(3-[Carbamoyl]-acrylamido)-2,2-dimethyl-3-(5-tetrazolyl)penam

HRID 614143

Reaktionsgleichung

Reaktionsgleichung von HRID 614143
[C:1]([OH:8])(=O)/[CH:2]=[CH:3]\[C:4]([NH2:6])=[O:5].C(N(CC)CC)C.ClC(OCC(C)C)=O.[NH2:24][CH:25]1[C:38](=[O:39])[N:27]2[CH:28]([C:33]3[NH:37][N:36]=[N:35][N:34]=3)[C:29]([CH3:32])([CH3:31])[S:30][C@H:26]12>CN1CCOCC1.O1CCCC1.O>[C:4]([CH:3]=[CH:2][C:1]([NH:24][CH:25]1[C:38](=[O:39])[N:27]2[CH:28]([C:33]3[NH:34][N:35]=[N:36][N:37]=3)[C:29]([CH3:31])([CH3:32])[S:30][C@H:26]12)=[O:8])(=[O:5])[NH2:6]

Komponenten

8

Edukt 4

HCID 8471TriethylamineHCID 62365Isobutyl chloroformateHCID 5280451Maleamic acidHCID 178431949HCID 178431949, Verbindung

Produkt 1

HCID 1784319306-(3-[Carbamoyl]-acrylamido)-2,2-dimethyl-3-(5-tetrazolyl)penamAusbeute 33 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 79724-MethylmorpholineKatalysatorHCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To a stirred mixture of 1.15 g. (10 m mole) of maleamic acid and 1.40 ml. of triethylamine in 40 ml. of dry tetrahydrofuran, at 0° C., is added 1.57 ml. (12 m mole) of isobutyl chloroformate followed by three drops of N-methylmorpholine. Stirring is continued for a further 30 minutes at 0° C. To this mixed anhydride is then added a solution prepared by adding 2.40 g. (10 m mole) of 6-amino-2,2-dimethyl-3-(5-tetrazolyl)penam to a mixture of 15 ml. of water and 15 ml. of tetrahydrofuran and adjusting the pH to 7.5. The resulting mixture is then stirred for a further 1 hour at 0° C. At this point, the tetrahydrofuran is removed by evaporation in vacuo, and the residue is diluted with more water. The pH is adjusted to 8.0 with 6 N sodium hydroxide, and then the mixture is extracted with ethyl acetate. The extracts are discarded. The pH of the residual aqueous phase is adjusted to 2.0 with 4 N hydrochloric acid and then the product is extracted into ethyl acetate. The organic layer is dried and concentrated in vacuo to give 6-(3-[carbamoyl]-acrylamido)-2,2-dimethyl-3-(5-tetrazolyl)penam (1.03 g., 33% yield). The infrared spectrum (KBr disc) of the product shows absorption bands at 1818 cm-1 (β-lactam) and 1692 cm-1. The NMR spectrum (DMSO-d6) shows bands at 7.00 and 6.25 (quartet, 2H, J = 12 Hz, olefinic hydrogens), 5.80-5.48 ppm (multiplet, 2H, C-5 and C-6 hydrogens), 5.26 ppm (singlet, 1H, C-3 hydrogen), 1.65 ppm (singlet, 3H, C-2 methyl hydrogens) and 1.06 ppm (singlet, 3H, C-2 methyl hydrogens).

Aufarbeitung

  1. additionTo a stirred mixture of 1.15 g
  2. customprepared
  3. additionby adding 2.40 g
  4. stirringThe resulting mixture is then stirred for a further 1 hour at 0° C
  5. customAt this point, the tetrahydrofuran is removed by evaporation in vacuo
  6. additionthe residue is diluted with more water
  7. extractionthe mixture is extracted with ethyl acetate
  8. extractionthe product is extracted into ethyl acetate
  9. customThe organic layer is dried
  10. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-44e87e836fef40af80117f89a3231faf
Quelldatensatz
uspto-grants-1979_03
Patentnummer
US04143039

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