Hydrochloric Acid → 1-(2,6-Dimethylphenyl)-3-(1,2-oxazolidine-2-carboximidoyl)urea;hydrochloride

HRID 1439223Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1439223
[OH-].[Na+].S(O)(O)(=O)=O.[C:8]([N:11]1[CH2:15][CH2:14][CH2:13][O:12]1)(=[NH:10])[NH2:9].S([O-])([O-])(=O)=O.[Na+].[Na+].[CH3:23][C:24]1[CH:29]=[CH:28][CH:27]=[C:26]([CH3:30])[C:25]=1[N:31]=[C:32]=[O:33].[N-]=C=O.[ClH:37]>O1CCCC1.CO.C(OCC)(=O)C>[ClH:37].[CH3:30][C:26]1[CH:27]=[CH:28][CH:29]=[C:24]([CH3:23])[C:25]=1[NH:31][C:32]([NH:10][C:8]([N:11]1[CH2:15][CH2:14][CH2:13][O:12]1)=[NH:9])=[O:33]

Komponenten

10

Edukt 6

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 24436Sodium SulfateHCID 987872,6-Xylyl isocyanateHCID 105034IsocyanateHCID 20465274N-amidinoisooxazolidine sulfate

Produkt 1

HCID 1457970781-(2,6-Dimethylphenyl)-3-(1,2-oxazolidine-2-carboximidoyl)urea;hydrochloride

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 887MethanolLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To 2.9 (36.0 mmol) of fifty percent (w/w) sodium hydroxide suspended in tetrahydrofuran (50 ml.) is added 6.0 g. (18.0 mmol) of N-amidinoisooxazolidine sulfate and the mixture stirred for 1 hour. Five (5.0) grams of anhydrous sodium sulfate are added and the mixture stirred for an additional hour. To this mixture are added 5.4 g. (36.0 mmol) of 2,6-dimethylphenylisocyanate and the mixture stirred for 3 hours. Thin layer chromotography (ethyl acetate) showed no starting isocyanate so the tetrahydrofuran is removed under vacuum. The residue is partitioned between water and chloroform. The layers are separated and the aqueous layer extracted with chloroform (1×100 ml.). The combined chloroform extracts are dried over anhydrous magnesium sulfate, filtered and concentrated to give an oil which is dissolved in methanol and acidified (pH=1) with methanolic hydrochloric acid. The methanol is removed to give an oil which is triturated with diethyl ether to give a solid which is crystallized from tetrahydrofuran/hexane to give N-[(2,6-dimethylphenylcarbamoyl)amidino] isooxazolidine hydrochloride, m.p. 147°-8° C.

Aufarbeitung

  1. additionis added 6.0 g
  2. additionTo this mixture are added 5.4 g
  3. customis removed under vacuum
  4. customThe residue is partitioned between water and chloroform
  5. customThe layers are separated
  6. extractionthe aqueous layer extracted with chloroform (1×100 ml.)
  7. dry with materialThe combined chloroform extracts are dried over anhydrous magnesium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customto give an oil which
  11. customThe methanol is removed
  12. customto give an oil which
  13. customis triturated with diethyl ether
  14. customto give a solid which
  15. customis crystallized from tetrahydrofuran/hexane

Quellen und Nachweise

ORD-Eintrag
ord-83e5f7d6e0f64825bb172210bd7252b8
Quelldatensatz
uspto-grants-1977_11
Patentnummer
US04058557

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