Ethylene Glycol → Benzyl oximino-acetoacetate ethylene ketal

HRID 1833791Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1833791
O.[N:2](=[CH:4][C:5](=[O:17])[CH2:6][C:7]([O:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[O:8])[OH:3].[CH2:18](O)[CH2:19][OH:20].C1(C)C(S(O)(=O)=O)=CC=CC=1>C1C=CC=CC=1>[CH2:19]1[O:20][C:5]([CH:4]=[N:2][OH:3])([CH2:6][C:7]([O:9][CH2:10][C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=2)=[O:8])[O:17][CH2:18]1

Komponenten

6

Edukt 4

HCID 174Ethylene GlycolHCID 962WaterHCID 69252-Methylbenzenesulfonic acidHCID 86734531HCID 86734531, Verbindung2×

Produkt 1

HCID 86734545Benzyl oximino-acetoacetate ethylene ketalAusbeute 35 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel

Versuchsvorschrift

In a two liter flask fitted with a Dean Stark water separator and an condenser were placed 186.5 g. (0.85 mole) of benzyl oximino-acetoacetate (17), 62 g. (1 mole) of ethylene glycol, 800 ml. of benzene (reagent grade) and 2 g. of toluenesulfonic acid. The reaction mixture was boiled at reflux until 15 ml. of water was removed (3 hours). The benzene solution was washed once with saturated sodium bicarbonate solution and once with brine. After drying over anhydrous sodium sulfate, the benzene solution was evaporated, leaving 212 g. (94%) of 17 as a light yellow oil. Its NMR spectrum was consistent with the assigned structure. Generally the compound was used as such in subsequent reaction but one of the isomers can be crystallized in 35% yield from toluene-petroleum ether, m.p. 52° C. ##STR177##

Aufarbeitung

  1. temperatureat reflux until 15 ml
  2. customof water was removed (3 hours)
  3. washThe benzene solution was washed once with saturated sodium bicarbonate solution and once with brine
  4. dry with materialAfter drying over anhydrous sodium sulfate
  5. customthe benzene solution was evaporated
  6. customleaving 212 g
  7. customsuch in subsequent reaction but one of the isomers
  8. customcan be crystallized in 35% yield from toluene-petroleum ether, m.p. 52° C.

Quellen und Nachweise

ORD-Eintrag
ord-07276b4fbc40415cb841c9e66316d329
Quelldatensatz
uspto-grants-1978_01
Patentnummer
US04066831

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