Methanol → 1,6-Dihydro-5(4H)-pyrimidinone O-(2-propynyl)oxime monohydrochloride

HRID 129816

Reaktionsgleichung

Reaktionsgleichung von HRID 129816
O.[ClH:2].Cl.[NH2:4][CH2:5][C:6]([CH2:8][NH2:9])=O.Cl.[CH2:11]([O:14][NH2:15])[C:12]#[CH:13].[CH3:16]O>>[ClH:2].[CH2:11]([O:14][N:15]=[C:6]1[CH2:8][NH:9][CH:16]=[N:4][CH2:5]1)[C:12]#[CH:13]

Komponenten

4

Edukt 3

HCID 887MethanolHCID 13502403O-(prop-2-yn-1-yl)hydroxylamine hydrochlorideHCID 190837391,3-Diaminopropan-2-one--hydrogen chloride--water (1/2/1)

Produkt 1

HCID 736056041,6-Dihydro-5(4H)-pyrimidinone O-(2-propynyl)oxime monohydrochlorideAusbeute 36 %

Versuchsvorschrift

1,3-diaminoacetone dihydrochloride monohydrate (1.10 g, 6.14 mmol) was dissolved in refluxing methanol and O-(2-propynyl)hydroxylamine hydrochloride (0.730 g, 6.75 mmol) was added. After refluxing for 48 hours the solvent was evaporated. The crude product was dissolved in methanol and an excess of trimethylorthoformate was added to the reaction mixture and heated to reflux. After 24 hours the solvent was removed in vacuo. Crystallization from methanol/ethyl acetate afforded 410 mg (36%) of light-brown material. Mp. 205.0° C.

Aufarbeitung

  1. additionwas added
  2. temperatureAfter refluxing for 48 hours the solvent
  3. customwas evaporated
  4. dissolutionThe crude product was dissolved in methanol
  5. additionan excess of trimethylorthoformate was added to the reaction mixture
  6. temperatureheated to reflux
  7. customAfter 24 hours the solvent was removed in vacuo
  8. customCrystallization from methanol/ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-98086c9c03a94f4bbefe958470294dc0
Quelldatensatz
uspto-grants-1995_11
Patentnummer
US05470856

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