Lithium hydroxide, monohydrate → [Methyl-(toluene-4-sulfonyl)-amino]-acetic acid

HRID 81862Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 81862
[CH3:1][N:2]([CH2:13][C:14]([O:16]C)=[O:15])[S:3]([C:6]1[CH:11]=[CH:10][C:9]([CH3:12])=[CH:8][CH:7]=1)(=[O:5])=[O:4].O[Li].O>CO.C1COCC1.O>[CH3:1][N:2]([CH2:13][C:14]([OH:16])=[O:15])[S:3]([C:6]1[CH:7]=[CH:8][C:9]([CH3:12])=[CH:10][CH:11]=1)(=[O:4])=[O:5]

Komponenten

4

Edukt 2

HCID 168937Lithium hydroxide, monohydrateHCID 3277444Methyl 2-{methyl[(4-methylphenyl)sulfonyl]amino}acetate

Produkt 1

HCID 802555[Methyl-(toluene-4-sulfonyl)-amino]-acetic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 21892291Methanol tetrahydrofuran waterLösungsmittel

Versuchsvorschrift

Methyl ester 6 (2.60 g, 10.1 mmol) was dissolved in a 3:1:1 mixture of MeOH-THF—H2O. LiOH.H2O (0.53 g, 12.6 mmol) was added at room temperature and the reaction allowed to stir for 3 h. All solvents were evaporated, apart from water. The remaining aqueous solvent was diluted further and thoroughly washed with ethyl acetate. The aqueous basic aqueous layer was then acidified to pH 2 with 1 M HCl and the product extracted with ethyl acetate. The organic layers were then combined and dried over Na2SO4, filtered and concentrated to afford the title compound. (2.33 g, 95%): δH (400 MHz, CDCl3) 2.43 (s, 3H, CH3), 2.87 (s, 3H, CH3), 3.99 (s, 2H, CH2), 7.32 (d, J=8.0 Hz, 2H, CH), 7.69 (d, J=8.0 Hz, 2H, CH); δC (100 MHz, CDCl3) 21.4, 35.7, 50.6, 127.3, 129.6, 134.8, 143.7, 173.5; LRMS (ES+) calcd for [C10H13NO4S+H] 244.06. found 244.07 [M+H].

Aufarbeitung

  1. customAll solvents were evaporated, apart from water
  2. additionThe remaining aqueous solvent was diluted further
  3. washthoroughly washed with ethyl acetate
  4. extractionthe product extracted with ethyl acetate
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-3bdff2d074c44c9987c94d2ad11978b5
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846707B2

Notizen zur Reaktion

Wird geladen…