(2-Hydroxyphenyl)acetic acid → 2-(2-Hydroxyphenyl)acetic acid ethyl ester

HRID 73466

Reaktionsgleichung

Reaktionsgleichung von HRID 73466
[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]([OH:11])=[O:10].O.[C:13]1(C)C=CC(S(O)(=O)=O)=C[CH:14]=1>C(O)C>[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]([O:11][CH2:13][CH3:14])=[O:10]

Komponenten

4

Edukt 2

HCID 11970(2-Hydroxyphenyl)acetic acidHCID 521998p-Toluenesulfonic acid monohydrate

Produkt 1

HCID 5210752-(2-Hydroxyphenyl)acetic acid ethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

The stirred solution of 2-(2-Hydroxyphenyl)acetic acid (10 g, 65.7 mmol) and p-Toluenesulfonic acid monohydrate (1.40 g, 7.3 mmol) in abs ethanol (100 ml) was refluxed for 4 hours or until all the starting material is consumed. The reaction mixture was concentrated, diluted with ethyl acetate and washed with 1M HCl and brine. The organic layer was dried over Na2SO4, filtered, concentrated, and purified by flash chromatography on a silica gel column (hex:ethyl acetate 2:1) to give the title compound.

Aufarbeitung

  1. customis consumed
  2. concentrationThe reaction mixture was concentrated
  3. additiondiluted with ethyl acetate
  4. washwashed with 1M HCl and brine
  5. dry with materialThe organic layer was dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. custompurified by flash chromatography on a silica gel column (hex:ethyl acetate 2:1)

Quellen und Nachweise

ORD-Eintrag
ord-3444b0344ac24d3e987a63805847d5ac
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08829058B2

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